What is the value of the expression below?

Answer:

4 and 5

Step-by-step explanation:

xy = 20

x + y = 9 ⇒ x = 9 - y

y(9 - y) = 20

9y - y² = 20

y² - 9y + 20 = 0

D = ( - 9)² - 4(1)(20) = 81 - 80 = 1

[tex]y_{1}[/tex] = (9 + 1) ÷ 2 = 5

[tex]y_{2}[/tex] = (9 - 1) ÷ 2 = 4

The numbers are 4 and 5

Answer:

x = 1000

Step-by-step explanation:

To solve for x, you do the same thing to both sides to isolate x.

To isolate x in this equation, you divide both sides by 10.

10x = 10,000

10x/10 = 10,000/10

x = 1,000

Answer:

the answer is 12 thankyou lorcolantro for wasting our time

Step-by-step explanation:

ya lorcolantro you made me F

The value of the given expression j³k/h⁰ at h = 8, j = -1, and k = –12 will be 12 so option (B) will be correct.

A mixture of variables, numbers, addition, subtraction, multiplication, and division are called expressions.

An expression is a mathematical proof of the equality of two mathematical expressions.

A statement expressing the equality of two mathematical expressions is known as an equation.

Given the expression is

j³k/h⁰

Substituting h = 8, j = -1, and k = –12 into the expression

(-1)³(-12)/(8)⁰ = -1 × (-12)/1 = 12

Hence " The value of the given expression j³k/h⁰ at h = 8, j = -1, and k = –12 will be 12".

To learn more about expression,

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Answer:  Aaron was at the sitter for 5 hours

Step-by-step explanation:

12x + 10 = 58

the 12x is for each hour after the first hour and the 10 is the first hour

-10 from each side

12x = 48

/12

x = 4

4 additional hours plus the original hour

Answer:

C.) y=-2/3+4

Step-by-step explanation:

You can look at the y-intercept to find the equation really quickly!

For example, the line crosses the y-axis at the value of 4, therefore, the y-intercept is 4.

The only option with a y-intercept of 4 is C

Answer:

153.94cm²

Step-by-step explanation:

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[tex]Area = \pi \times ({radius})^{2} [/tex]

[tex]Area = \pi \times ({7})^{2} [/tex]

[tex]Area = \pi \times 49[/tex]

[tex]Area = 49\pi[/tex]

Done...

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Answer:

89

Step-by-step explanation:

180 - (50 + 41)

180 - 91

89

.ie x= 89

because total sides of triangle = 180 degree

hope this answer helps!!!!

Answer: 1.75

Step-by-step explanation:

12x-3=18

+3 +3

12x=21

12 12

x=1.75

Answer:

[tex]5110, 5111, 5112[/tex]

Step-by-step explanation:

Let [tex]x=[/tex] first consecutive number

[tex]x + (x+1)+(x+2) = 15333[/tex] ([tex]x[/tex] is the first number, [tex]x+1[/tex] would be the second consecutive number of the sequence, and [tex]x+2[/tex] would be the third)

[tex]3x + 3 = 15333[/tex]

[tex]3x = 15330[/tex]

[tex]x = 5110[/tex]

[tex]x+1 = 5110+1[/tex]

[tex]= 5111[/tex]

[tex]x+2 = 5110 + 2[/tex]

[tex]= 5112[/tex]

[tex]\therefore[/tex] the consecutive numbers that sum up to [tex]15333[/tex] are [tex]5110, 5111,[/tex] and [tex]5112[/tex]

Hope this helps :)

Answer:

1. A'B'C'

(2, 4) (4, 10) (14, 2)

A''B''C'' (2, 8) (8, 14) (14, 6)

2. D'E'F'G

(-6, 3) (-9, 3) (-6, 12) (-9, 12)

D''E''F''G'' (-2, 1) (-3, 1) (-2, 4) (-3, 4)

Step-by-step explanation:

Ok. So, when you are dialating, you first step is to determine wether it is bigger or smaller. If the scale factor is more than one, it is an enlargment or getting bigger. If it is less than 1, it is a reduction and getting smaller. Then, it is just math. Lets say that the point is (2, 4) and your scale factor is 2. Multiply 2 times 2 to get 4. Then multiply 4 times 2 to get 8. Your new cordinante is (4, 8).

You are not stupid you can do it!

Answer: 32 first 12 second 16 last Yw!

Step-by-step explanation:

Answer:

To find the slope of a line from a graph, first choose 2 points along the line and write down the X and Y coordinates for each. Next, find the rise by taking the difference between the 2 Y coordinates. If the line slopes up as it moves to the right, the rise will be positive. If it slopes down, the rise will be negative.

Step-by-step explanation:

Answer:

true because when you add negatives it's the same as subtracting, so, you're just going further negative

Answer: 44/7

Step-by-step explanation:     Hope it helps pls give brainliest

6 2/7= ?/7

multiply 6 by 7

= 6 2/7= 42/7

add 42 and 2= 44

= 44/7

The given mixed number 6 2/7 expressed as an improper fraction is 44/7.

The given mixed numbers s as follows:

6 2/7

To convert the mixed number 6 2/7 to an improper fraction, we can follow these steps:

Multiply the whole number (6) by the denominator (7).

⇒ 6 x 7 = 42

Add the product from Step 1 to the numerator (2).

⇒ 42 + 2 = 44

Write the sum from Step 2 as the new numerator over the denominator (7).

The improper fraction equivalent of 6 2/7 is 44/7.

Therefore, 6 2/7 expressed as an improper fraction is 44/7.

Learn more about the fraction here:

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Answer:

We need to see the graph in order to solve this.

Step-by-step explanation:

No graph

Answer:

.15 or 15%

Step-by-step explanation:

5+8+4+3=20

3 purple marbles/20 total marbles= .15

Answer:

|| slope= 1/3

⊥ slope=-3

Step-by-step explanation:

The line is y=1/3x+5

Parallel slopes are the same (think about parallel lines and how they will never intersect- that means that slopes of those lines will never intersect so they have to be the same)

That means that the || slope will be 1/3.

Perpendicular slopes are negative and reciprocal (if you multiply them, they will equal -1)

Which means to solve for the slope perpendicular, use this equation

1/3m=-1

multiply by 3 on both sides

m=-3

So that means the ⊥ slope will be -3.

hope this helps!

Answer:

[tex]\frac{1}{3}[/tex] and - 3

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = [tex]\frac{1}{3}[/tex] x + 5 ← is in slope- intercept form

with slope m = [tex]\frac{1}{3}[/tex]

Parallel lines have equal slopes, thus

[tex]m_{parallel}[/tex] = [tex]\frac{1}{3}[/tex]

Give a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{\frac{1}{3} }[/tex] = - 3

Answer:

you would have to find the other value of the ratio.

If you look at the original ratio of 5:4, you can tell that 45 is just 8×5 and therefore you can also multiply 4×8 which would 32.

Step-by-step explanation:

I hope this helps :)

Also like your picture <3

Answer:  3 and 18

Step-by-step explanation:

x + 6x = 21

7x = 21  Divide both sides by 7

x = 3   That's the first number. Multiply by 6 for the second number:

6 × 3 = 18

Answer:

i got 4

Step-by-step explanation:

Answer:

2²

Step-by-step explanation:

[tex]\frac{a^{m}}{a^{n}}=a^{m-n} , m>n\\\\\\\frac{2^{7}}{2^{5}}=2^{7-5}=2^{2}[/tex]

Answer:

C-7/8

R-8/9

P-61/66

L-11/18

I-3/4

A-7/12

O-47/55

H-29/40

S-28/33

T-4/5

M-11/12

E-71/84

U-13/42

N-19/20

I swear to god if I don’t get brainliest I’m going to lose it I haven’t done this math in like four years and it kinda took a while.... but I hope it helped u ☺️☺️☺️❤️❤️❤️❤️

Step-by-step explanation:

Answer:

I-9/12 or 3/4

T- 8/10 or 4/5

C- 7/8

A- 7/12

M- 11/12

R- 7/9

O- 36/55

E- 71/84

P- 61/66

H- 29/40

U- 13/42

L- 11/18

S- 28/33

N- 19/20

Step-by-step explanation:

if any are wrong, just lmk and i'll see what I did. But, i'm pretty sure they're right

Answer:

100 boys at the concert

Step-by-step explanation:

When changing the ratio between the number of boys to the number of girls, it always has to be equivalent to the original ratio 2:7

So, convert the ratio 2:7 to a different ratio, but it still has to be equivalent to the ratio 2:7. By doing that, multiply both sides of the 2:7 ratio by 50:

  2   :   7

×50   ×50

To get:

100:350  ⇒  This ratio means that the ratio between the number of boys to the number of girls is now 100:350, but that’s okay to have because it’s still equivalent to the original 2:7 ratio.

So, using the new ratio 100:350, this means that there are 100 boys at the concert and 350 girls at the concert, and 350 is 250 more than 100 which proves what the question is asking. So there are 100 boys at the concert.

Answer: 100 boys at the concert

I hope you understand and that this helps with your question! :)

Answer:

there is no picture sir

Answer:

3/4

Step-by-step explanation:

Please give brainliest!

Answer:

(a) The system of two equations are

c = $300...(1)

p = x × ($2.50 - $1.25)...(2)

(b) The number of candles she must sell to break even are 240 candles

Step-by-step explanation:

The cost of of producing a candle = $1.25

The price at which Adah sells a candle = $2.50

The stat-up cost of producing candles = $300

(a) Let c represents the start-up cost of producing candles, let p represent the profit Adah makes from selling candles and x represents the number of candles sold, we have;

c = $300...(1)

p = x × ($2.50 - $1.25)...(2)

(b) The number of candles Adah must sell to break even is given as follows;

At break even point, Start-up cost = Profit

∴ c = p

300 = x × (2.50 - 1.25) = 1.25·x

∴ x = 300/1.25 = 240

Therefore;

The number of candles she must sell to break even = 240 candles

Answer:

$686.94

Step-by-Step Explanation-

FORMULA ~ A= P(1+r)^n

A= 600(1+0.07)^2

A=600(1.07)^2

A=600( 1.1449)

A= $686.94

So, ya that's the ans

9514 1404 393

Answer:

  A.  Multiplication with 3×3 matrices

Step-by-step explanation:

Multiplication with real or complex numbers is commutative. Matrix multiplication is not commutative, in general.

Answer:

1. 7/12

2. 6  2/5

3. 18/5

Step-by-step explanation:

Answer:

1st is 7/12

2nd is 6and 2/5

3rd is answer is not shown

Step-by-step explanation: Brainliest pls

hope this helped

Answer:

so first we will find the interior angle:  

1 angle :  31 (given )

2 angle :31 ( the base angles of isoscles triangle are equal)

3 angle : 31 + 31 + x = 180                     ( angle sum property of triangle)

              x = 180 - 62 = 118

now the exterior angles :

1 angle : 180 - 31 = 149 ( exterior angle and the angle adjacent usually forms  a line (= 180) )

2 angle : 149 ( same reason as the first)

3 angle : 180 - 118 = 62 (  same reason as the first)

( i dont know if there is any other way, but this is one)