Simplify plzzzz ill give brainliest

Answer:

C

Step-by-step explanation:

We start by calculating the z-score of 27 minutes

Mathematically z-score = (x-mean)/SD

FROM the question, mean = 21 and SD = 2

so z-score = (27-21)/2 = 6/2 = 3

The probability we want to calculate is P(z > 3)

we proceed to the standard normal distribution table to get this

P(z > 3) = 0.0013499

Now seeing this, we want to calculate the number of days.

Since there are 180 days in a year and we have 4 years, the total number of days = 180 * 4 = 720 days

The number of days in which the school bus took more than 27 minutes will be ;

720 * 0.0013499 = 0.971928 which is approximately 1

Answer:

C.1

Step-by-step explanation:

On edmentum this is correct.

Answer: The "rise over run" is equivalent to 1/3

Step-by-step explanation:

Since the m variable in the equation is 3, the line is going to be wider, there for it will go up 1 and 3 to the right with each point on the line, therefore the answer is B.

The requried slope of the line is 3, which is a positive number. Therefore, the line has a positive slope, and option D is true.

The equation is the relationship between variables and represented as y = ax + b.

Here,
A.

The y-intercept is -7.
The equation y = 3x - 7 is in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept. Therefore, the y-intercept of this line is -7, not 7, as given in option A.

B.
The "rise over run" is equivalent to 3. Option B is not correct.

C.
point (1, 4) lies on the line.

To check whether the point (1, 4) lies on the line, we can substitute x = 1 and y = 4 into the equation y = 3x - 7 and see if the equation is true:

y = 3x - 7

4 = 3(1) - 7

4 = -4

Since the equation is not true, the point (1, 4) does not lie on the line, and option C is false.

D.
The line has a positive slope.

As we determined earlier, the slope of the line is 3, which is a positive number. Therefore, the line has a positive slope, and option D is true.

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Answer:

40-24=16 16/2 = 8

Step-by-step explanation:

Answer:

The answer is 8.5

Step-by-step explanation:

50-46.10=3.9

you then divide 3.9 by 46.10 and you get 0.0845...

so you estimate and get your answer

The percent error in Wesley's estimate is 8.5% if the estimated total purchase is $50 and the actual total purchase is $46.10.

Percentage is a form of writing numbers as part of 100. The symbol used to denote percentage is '%'.

Percentage of a number can be calculated by dividing the number with the whole and then multiplying with 100.

Percentage is a dimensionless number because it has no measurement units.

The percent error can be calculated by the formula,

Percent error = [(Estimated value - Actual value)/ actual value] × 100

Estimated total purchase of groceries by Wesley = $50

Actual total purchase made by Wesley = $46.10

Percent error = [(50 - 46.10) / 46.10] × 100

                      = (3.9 / 46.10) × 100

                      = 0.0846 × 100

                      = 8.46%

                      ≈ 8.5%

Hence the percent error for the estimation of total purchase of groceries by Wesley is 8.5%.

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Answer:

Step-by-step explanation:

All you have to do here is divide 80 by 50.

80/50 = 8/5 = 1.6

Therefore if you convert this into a percentage:

1.6 = 160%

This means that her balance increased by 160%.

Answer:

80 red pencils

Step-by-step explanation:

240/3=80

Answer:

30,000 milliliters

Step-by-step explanation:

There are 15 2-liter bottles, so you must get the total number of liters by multiplying 15 and 2 to get 30. Then, because there are 1,000 milliliters per liter, you multiply 30 by 1,000 to get 30,000 milliliters total.

Step-by-step explanation:

a, b, c are real number

Then,

Always True statements are -

Answer:

ABC are real numbers

Step-by-step explanation:

Answer:

Simplifying

75 = 2x + -1

Reorder the terms:

75 = -1 + 2x

Solving

75 = -1 + 2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2x' to each side of the equation.

75 + -2x = -1 + 2x + -2x

Combine like terms: 2x + -2x = 0

75 + -2x = -1 + 0

75 + -2x = -1

Add '-75' to each side of the equation.

75 + -75 + -2x = -1 + -75

Combine like terms: 75 + -75 = 0

0 + -2x = -1 + -75

-2x = -1 + -75

Combine like terms: -1 + -75 = -76

-2x = -76

Divide each side by '-2'.

x = 38

Simplifying

x = 38

Step-by-step explanation:

Answer:

The number of line symmetry in a regular polygon of n sides is 'n'. For example a regular pentagon has 5 line symmetry,Hexagon has 6 line symmetry etc.

Step-by-step explanation:  hope this help =)

Answer:

n

Step-by-step explanation:

A regular polygon with n sides has ____ lines of symmetry.

A square has 4 lines of symmetry

A pentagon has 5 lines of symmetry

A n-agon will have n lines of symmetry

Answer:

Translation Followed by Rotation

Step-by-step explanation:

Figure 1 is Translated to the right, becoming figure 2. Figure 2 is then rotated  to become figure 3.

Hope it helped :)

Answer:

21.06 square feet

Answer:

7 CA I don't know what you think of the year

Answer:

The 25 paisa coin is worth 1⁄4 of a rupee (1 rupee = 100 paise).

Step-by-step explanation:

The 25 paisa coin is worth 1⁄4 of a rupee (1 rupee = 100 paise).

Answer:

y=2x-7

Step-by-step explanation:

2 would equal M because m is your slope.

-7 would be your y intercept

following y=mx+b

The required equation of the line is given as y = 2x -7.

Given that,
The slope of 2 and y-intercept of −7

The slope of the line is a tangent angle made by line with horizontal. i.e. m =tanx where x in degrees.

Here,
The equation of the line is given as.
y = mx + c
Substitute the value in the equation,
y = 2x - 7

Thus, the required equation of the line is given as y = 2x -7.

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The value of A is 7, the value of B is 31, the value of C is 28, the value of D is 13, and the value of E is 65.

Sets are the collection of well-defined elements. A set is represented by a capital letter symbol and the number of elements in the finite set is shown as curly bracket {..}. Venn diagrams are a representation of the sets by the diagram.

A group of 65 baseball players was surveyed about which hand they favor for batting. The data from the survey are shown in the Venn diagram.

The table is shown below.

More about the sets link is given below.

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Answer:

Step-by-step explanation:

A=7 B=31 C=28 D=13 E=65

Answer:

if you mean by addition its 5 and if its multiplication then its 6

Step-by-step explanation:

Answer:

55 MOVIES???!!               ok here's the answer: 33 is 60 percent of 55 = 60

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

because you it is greater

Answer:

Let s = each square foot of wood installed

Step-by-step explanation:

Total cost of laying wood = base price + price for each square foot installed

Base price = $250

Price for each square foot installed = $3.50

Let

s = number of each square foot installed

Total cost of laying wood = $250 + $3.50s

The correct answer is

Let s = each square foot of wood installed

Answer:

-4 5/12

Step-by-step explanation:

Answer:

In order to describe the pattern of the number of dots as a function of the picture number you have to take the average values of each number and find the line of best fit between each dot. This gives you a function, such as, f(x) = mx+b.

Answer:A- Proportion

Step-by-step explanation:

Answer:

The correct answer is B $887.5

Answer:

B.

887.50

Step-by-step explanation:

[tex]si = p \times r \times t \div 100[/tex]

[tex]si \: = 2500 \times 7.1 \times 5\div 100[/tex]

[tex]25 \times 7.1 \times 5[/tex]

[tex] = 887.50[/tex]

As we know that perimeter of a shape is the sum of all it's boundaries. Also , let assume that the missing side be y . So ,here ;

[tex]{:\implies \quad \sf (4x-4)+(3x+1)+y=13x-8}[/tex]

[tex]{:\implies \quad \sf 4x-4+3x+1+y=13x-8}[/tex]

[tex]{:\implies \quad \sf y+7x-3=13x-8}[/tex]

[tex]{:\implies \quad \sf y=13x-8-7x+3}[/tex]

Collecting like terms :

[tex]{:\implies \quad \sf y=(13x-7x)+(-8+3)}[/tex]

[tex]{:\implies \quad \bf \therefore \quad \underline{\underline{y=6x-5}}}[/tex]

Hence , the length of Missing side is 6x-5

Answer:y=-4.6667

Step-by-step explanation:

Answer:  y= -4

Step-by-step explanation:

6y + 2 = 9y + 14      Subtract 2 from both sides

      -2             -2

6y = 9y + 12             Subtract 9y from both sides

-9y    -9y

-3y = 12      Divide both sides by -3

y= -4

Answer:

40 fluid ounces

Step-by-step explanation:

Step-by-step explanation & answer:

When a dilation in the coordinate plane has the origin as the center of dilation, we can find points on the dilated image by multiplying the x and y coordinates of the original figure by the scale factor.

For example, if the scale factor is "k", the algebraic representation of the dilation is

(x, y) → (kx, ky)

For enlargements, k > 1 and for reductions, k < 1.

Hope this is what you needed:)

The after the dilation by scale factor of 3, coordinates the point P(x, y) will become P'(3x, 3y).

A dilation is an enlargement or reduction of a figure about a center of dilation by a specified scale factor [k].

Given is a algebraic rule for a dilation with a scale factor of 3.

Suppose that we have a point P(x, y) which is dilated by the

scale factor of 3. Now, after dilation of the coordinate, the final coordinates of that point P(x, y) will become P'(3x, 3y). If the scale factor would have been less than one the point will contract.

Therefore, the after the dilation by scale factor of 3, coordinates the point P(x, y) will become P'(3x, 3y).

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