What is 30% of 42?
I’ve given up on my hw pls help

The area of the shaded region would be 4π - 8 square units.

What is the area of a circle?

The area of a circle is given by the formula: A = πr^2, where A is the area, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius of the circle. The radius is the distance from the center of the circle to its edge.

In the given figure we have to find the height of the triangle and that will be the radius of the triangle.

In the triangle LMO,

Angle opposite to 45 = 1/√2* hypotenuse

MO = 1/√2 * 4

MO =2√2

Radius of the circle= 2√2

Area of the triangle = 1/2* MO * LN

                                  = 1/2 * 2√2*4√2

                                  = 8

Area of semi-circle =1/2 * πr²

                      =1/2 * π(2√2)²    

                     = 4π  

Area of shaded region = 4π - 8

Hence, the area of the shaded region would be 4π - 8 square units.

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Accordingly, the cylinder's volume would be 115.45 cubic inches given its parameters.

By multiplying the base area and height of a cylinder, one may get its volume. The radius of the circular base equals half its diameter, and the area of the base is equal to the area of a circle, which is denoted by the formula A = r2. As a result, a cylinder's volume equals:

Cylinder volume equals (r2)

h = 12 inches, where r = D/2 = 3.5 inches, 2 inches, and 1 inch.

Cylinder volume equals (1.75")2. ( 12 in )

147/4 in3 or 115.45353 in3 is the volume of the cylinder.

Accordingly, the cylinder's volume would be 115.45 cubic inches given its parameters.      

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In the overlapping triangles, the statements needed to be match to the reasons are explained below.

A triangle is sometimes referred to as trigon because it is bounded by three straight sides, and has a measure of internal angles which add up to 180^o.

Considering the overlapping triangles given in the question, the statements  to be matched to the reasons are given below:

                 STATEMENT                                      REASON

1. ΔRTN ≅ ΔSTM                                        Side-Angle-Side (SAS)

2. <T ≅ <T                                                   Betweenness

3. RN = SM                                                  Reflexive property

4. RM = SM, TM = TN                                 Given

5. RT = ST                                                   Substitution

6. RM + TM = TN  + SN                              CPCTE

7. RM + TM = SN + TM                                Addition property of equality

The match of statements with the reasons are required to proof that RN = SM

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Answer:

6[tex]x^{2}[/tex] + 8x

Step-by-step explanation:

4x(3x + 2) = 12[tex]x^{2}[/tex] + 8x  is the area of the big rectangle

2x(3x) = 6[tex]x^{2}[/tex]  is the area of the small rectangle.

Subtract the small rectangle from the large rectangle to find the area of the shaded region

12[tex]x^{2}[/tex] + 8x - 6[tex]x^{2}[/tex]

6[tex]x^{2}[/tex] + 8x

Substitute the values into the Pythagorean theorem and show that a false statement results.

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Work Shown:

x = his age now

x+11 = his age 11 years into the future

x-7 = his age 7 years ago

The equation to set up is

x+11 = 3(x-7)

since his age 11 years into the future is triple that of his age 7 years ago.

-------

Let's solve for x.

x+11 = 3(x-7)

x+11 = 3x-21

x-3x = -21-11

-2x = -32

x = -32/(-2)

x = 16

He is currently 16 years old.

11 years from now he'll be 16+11 = 27, and 7 years ago he was 16-7 = 9.

Note that 9*3 = 27 to help confirm the answer.

Answer:

16

Step-by-step explanation:

3(x-7)=x+11

Plug into equation and find value of x

Cost is equal to Selling price plus Loss ( when selling price and loss is given )Therefore, the cost price (C.P.) is 350.

Cost is the same as the selling price plus the loss ( when selling price and loss is given ).

The Profit and Loss Percentage Formula

Profitability (P%) is calculated as (Profit /Cost Price) / 100.

Loss percentage (L%) Equals 100 divided by (Loss / Cost price).

S.P. = {(100 + P%)/100}

if SP > CP, then CP

If SP > CP, S.P. = (100 - L%)/100 CP

C.P. = {100/(100 + P%)}

if SP > CP, then SP

C.P. = SP (if SP > CP)/100/(100 - L%)

Loss percent = 10%

To find:

The C.P.

Solution:

Let x be the C.P.

We have,

S.P. = 315

Loss percent = 10%

S.P = C.P - 10% 0f C.P

315 = X- 0.1X

315 = 0.9 X

Divide both sides by 0.9.

315/0.9 =X

350  = x

Therefore, the cost price (C.P.) is 350.

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The 4 properties of solutions are:

1) Consistency

2) Validity

3) Feasibility

4) Stability

In mathematics, a solution to an equation or system of equations is a set of values that can be substituted into the equation(s) to make the statement(s) true. The four properties of a solution are:

1) Consistency: A solution exists and is unique, or multiple solutions exist.

2) Validity: The solution(s) must satisfy the equation(s) and any constraints or boundary conditions.

3) Feasibility: The solution(s) must be within the domain of the equation(s) and any constraints or boundary conditions.

4) Stability: The solution(s) should be insensitive to small changes in the equation(s) or initial conditions.

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The value of exponential 2 is 2^2, or 4. This means two multiplied by itself two times or squared.

Exponential notation is a way of expressing a number, usually greater than 10, as a base number, the number 2 in this case, raised to a power, which in this case is 2. Therefore, exponential 2 is written as 2^2, which means two multiplied by itself two times or squared.

For example, if we wanted to find the value of exponential 8, we could easily calculate 2^8, or 256, which is much faster than multiplying 2 by itself 8 times. Exponential notation is also helpful when calculating exponents with variables.

For example, if we wanted to find the value of 3^x, we could use exponential notation to find the answer quickly. In summary, exponential notation is a useful tool for quickly finding the value of a number raised to a power.

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The product (x+5)(x - 1)(x+2) is equal to  x³ +6x² + 3x - 10 (C)

According to the Product Rule, the derivative of a product of two functions is equal to the product of the first function times the second function's derivative plus the second function times the first function's derivative.

The sum rule explains how many different methods there are to choose between two distinct groups of options. The product rule explains how many different methods there are to choose from each of two sets of options. Both laws apply to bigger sets families in general.

In the given question:-

=(x+5)(x - 1)(x+2)

=(x+5)(x^2+x-2)

=x^3+6x^2+3x-10

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The total cost of the rectangular frame is C = $240.

After a small search online, I found the original question, it is written at the end of the answer.

Remember that for a rectangle of length L and width W, the perimeter is given by:

P = 2*(L + W)

In this case, we know that the frame is 6 inches by 14 inches, then the perimeter will be:

P = 2*(6in + 14in)

P = 2*20in = 40in

And we know that the framing material costs $6 per inch, then the total cost of the frame will be:

cost = 40*$6 = $240

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After a small search online, I found that the complete question is:

"You decide to buy a custom frame for a painting which measures 4 by 6 inches. If the framing material costs $2 per inch, what is the total cost of framing material?"

An equation that can be used to determine the number of hours, h, that Moira needs to read to finish the book is h + 178 = 214.

In order to write an equation that model this situation, we would assign a variable to the number of hours that is needed to read to finish the book and the total number of hours respectively, and then translate the word problem into algebraic equation as follows:

Next, we would translate the word problem into an algebraic equation based on the fact that she read for 178 hours yesterday as follows;

h + 178 = T

Substituting the given parameters into the algebraic equation, we have the following;

h + 178 = 214

Solving for h, we have the following;

h = 214 - 178

h = 36 hours.

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Answer:

Step-by-step explanation:

x36 + 24

x39x² + 24x - 28

x3(x2 + 9x - 28/3)

x3(x + 28/3)(x - 3)

The distance across the river (BD) is 800 yards

An equation is an expression that shows the relationship between two or more numbers and variables. Types of equation are linear, quadratic, cubic and so on.

From the image shown, triangle ABC and triangle ADE are similar triangles. For similar triangles, the ratio of corresponding sides are proportional to each other. Hence:

AD/AB = DE/BC

substituting values:

AD / 200 = 500/100

AD = 1000 yards

AD = AB + BD

substituting:

1000 = BD + 200

BD = 800 yards

The value of BD is 800 yards

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The first packet by the second packet is the better size packet because the first packet is more expensive than the first packet.

The unit technique is a method of problem-solving that entails calculating the value of a single unit, multiplying that value, and then calculating the required value. To put it simply, the unit method is used to extract a single unit value from a specified multiple. One pen costs 400 rupees, thus 40 pens would cost 400 rupees. There might be a regular procedure for doing this out. merely one nation. anything containing a distinctive component. Mathematics of matrices or operators, linear algebra, mathematical analysis, and its adjoint and reciprocal are all equivalent.

given

The price of a 500 g packet of Healthy Flakes is €3.20.

Healthy Flakes come in packets of 750 g for €4.50.

A better size packet of 500 g costs €3.20. A two-pack of 750 g costs €166.66.

The first packet by the second packet is the better size packet because the first packet is more expensive than the first packet.

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To reflect a line over the line y = -2, we can first graph the line and then apply a transformation. A reflection in the y = -2 line can be thought of as a reflection in the x-axis, followed by a translation 2 units upward.

The transformation for a reflection over the line y = -2 is given by (x, y) → (x, -y - 4). To reflect a point (x, y) over the line y = -2, we substitute the coordinates of the point into the transformation and solve for the reflected point.

For example, to reflect the point (3, 4) over the line y = -2, we would substitute the coordinates into the transformation to get (3, -4 - 4) = (3, -8).

To reflect a line, we can reflect each point of the line over the line y=-2 and plot the reflected points.

In conclusion reflecting a line over y=-2 is done by applying a transformation (x, y) -> (x, -y - 4) to each point of the line, this can also be thought of as reflecting the line over x-axis and then translating 2 units upward.

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Answer:

x=14

Step-by-step explanation:

The angles inside a triangle add up to 180 degress all the time, therefore

58+80+3x=180

simplify

138+3x=180

subtract 138 from both sides of the equation

3x=42

divide both sides by 3

x=14

It is "3 pairs" not "3 pair", because a pair is a set of two things, so if you have 3 of them it would be 3 sets of two things or 3 pairs.

The rate of change for a linear function, also known as the slope, can be found by calculating the change in the y-coordinate (rise) divided by the change in the x-coordinate (run) between two points on the line. The slope of a line describes how steep the line is and whether it is increasing or decreasing.

In this case, the slope of the linear function can be found by using the coordinates of points E and F:

Slope = (y2 - y1) / (x2 - x1)

Slope = (-8 - 27) / (5 - 0)

Slope = -35/5

The slope of the linear function is -35/5 or -7.

The initial value of a linear function is the y-intercept, which is the point where the line crosses the y-axis. To find the y-intercept, we can use the slope and one point on the line (in this case point E (0,27)):

y = mx + b

27 = -7(0) + b

b = 27

The y-intercept of the linear function is 27.

So, the linear function starts at point E (0,27) with an initial value of 27, and has a rate of change or slope of -7.

Answer:

119 cm²

Step-by-step explanation:

Area of white triangle:

             base = 9 cm

           height = 14 cm

       [tex]\sf \boxed{Area \ of \ triangle = \dfrac{1}{2}*base *height}[/tex]

                                    [tex]\sf =\dfrac{1}{2}*9*14\\\\ = 9*7\\\\= 63 \ cm^2\\[/tex]

Area of trapezium:

          [tex]\sf \boxed{Area \ of \ trapezium =\dfrac{(a+b)*h}{2}}[/tex]

Here, a and b are the parallel sides of trapezium & h is the height.

           a = 9 cm ; b = 17 cm and h =14 cm

[tex]\sf Area \ of \ trapezium = \dfrac{(9+17)*14}{2}[/tex]

                           [tex]= \dfrac{26*14}{2}\\\\\\=13*14\\\\= 182 \ cm^2[/tex]

Area of shaded region = area of trapezium - area of white triangle

                                      = 182 - 63

                                      = 119 cm²

Answer:

area of shaded region = 119 cm²

Step-by-step explanation:

the outer figure has one pair of parallel sides and is a trapezium.

the shaded area (A) is calculated as

A = area of trapezium - area of white triangle

the area of a trapezium is calculated as

area = [tex]\frac{1}{2}[/tex] h (b₁ + b₂ )

where h is the perpendicular height between the bases b₁ and b₂

here h = 14 , b₁ = 9 , b₂ = 17 , then

area = [tex]\frac{1}{2}[/tex] × 14 × (9 + 17) = 7 × 26 = 182 cm²

the area of the triangle is calculated as

area = [tex]\frac{1}{2}[/tex] bh ( b is the base and h the height )

here b = 9 and h = 14 , then

area = [tex]\frac{1}{2}[/tex] × 9 × 14 = 4.5 × 14 = 63 cm²

then area of shaded region (A) is

A = 182 - 63 = 119 cm²

Answer: THE ANSWER IS 12

Step-by-step explanation:

HOPE IT HELPS =D

Using quadratic equation, the value of x is 5 and -1/3

3x²+16x-5

3x² +16x -5= 0

Split the middle term using two factors

3x² -15x -x -5= 0

Take out the common factors

(3x-1)(x-5)= 0

3x+1= 0

3x= 0-1

3x= -1

x= -1/3

x-5= 0

x= 0+5

x= 5

Hence x = 5 and x= -1/3

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The length of the side BD is;  8

The measure of the angle DAB is; ∠DAB = 53°

Two triangles are said to be congruent by any of the following postulates;

1) SSS (Side Side Side) Congruence Postulate.

2) SAS (Side Angle Side) Congruence Postulate.

3) ASA (Angle Side Angle) Congruence Postulate.

4) AAS (Angle Angle Side) Congruence Postulate.

5) HL (Hypotenuse Leg) Congruence Postulate

Now, for the given triangles that are congruent, we can say that;

∠ADC ≅ ∠ACB

∠DAB ≅ ∠CAB

BD ≅ BC

AC ≅ AD

Thus;

BD = 8

∠DAB 53°

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Answer: 439.2 miles

Step-by-step explanation:

213.5/3.5=61

61*7.2=439.2 miles in total

Answer:

Length = 18inch

Width = 15inch

Step-by-step explanation:

(Process/Explanation Below)

⇒ 66 ÷ 2 = 33  (We divide by 2 because we need to find two measurements which are our length and width)

⇒ 33 - 3 = 30  (Since the width is 3inches smaller than the length we have to subtract by 3.)

⇒ 30 ÷ 2 = 15in width  (This is our width because since a rectange has 2 sides we have to divide by 2.)

⇒ 5 + 3 = 18in length (This is our length because it says the length is 3inches longer than the width and the width is 15inches.)

Professional librarians should be accessible to pupils, according to administrators

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The volume, surface area, and ratio of the height of the box to the length will be 296.98 cubic inches, 292.35 square inches, and 0.88, respectively.

A closed solid with two parallel rectangular bases joined by a rectangle surface is known as a rectangular prism.

A rectangular box has a length of √90 inches, a width of √14 inches, and a height of √70 inches.

The volume of the box is given as,

V = LBW

V = (√90) x (√14) x (√70)

V = 296.98 cubic inches

The area of the top of the box is given as,

SA = 2(LW + WB + BL)

SA = 2(√90 x √14 + √14 x √70 + √70 x √90)

SA = 292.35 square inches

The ratio of the height of the box to the length of the box is given as,

H / L = √70 / √90

H / L = 0.88

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The population of the Boom town increased by 25% compared to last year, present population is 6000 then last year population is equal to 4800.

As given in the question,

Given population of the present year is equal to 6000

Let us consider 'x' be the last year population.

Increased in population compared to last year = 25%

Required equation is given by :

x + (25/100)x = 6000

⇒ (125 / 100 )x = 6000

⇒ x = ( 6000 × 100 ) / 125

⇒ x = 4800

Therefore, the population of the last year as per given data of the present year is equal to 4800.

The above question is incomplete, the complete question is:

Compared to last year, the population of Boom Town has increased by 25%. The population is now 6,000. What was the population last year?

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The interest rate for first loan is 5% and for the second loan is 7%.

The amount of first loan = $5000

Let the rate of interest for first loan = r

The interest from first loan = ($5000 × r)/100

= 50 r

The amount of second loan = $5000

Let the rate of interest for second loan = r+2

The interest from first loan = ($8000 × (r+2))/100

= 80 r + 160

Total interest = 50 r + 80 r + 160

= 130 r + 160

As per the question statement combined annual interest = $810

810 = 130 r + 160

r = (810-160)/130

r = 5%

Rate of second loan = r+2 = 5+2

= 7%

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Answer: The equation -x = 1 has only one solution, x = -1.

This can be shown by solving the equation for x:

-x = 1

x = -1

To show that this equation has only one solution, we can plug in -1 for x and check that the equation is true:

-(-1) = 1

1 = 1

So x = -1 is the solution.

No other values of x would work here and make the equation true.

Step-by-step explanation: