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3 years ago

If P =4 q=-2 r = 3 s =-5find pq + rs

1 answer:

6 0

PQ+RS
I’m assuming are multiplying each variable together so...

P=4
Q=-2

4 x -2 = -8

R=3
S=-5

3 x -5=-15

Final Solution: -8+(-15)=-23

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ddd [48]

Step-by-step explanation:

Dod you mean

$= \frac{ {n}^{5} }{ {n}^{ - 2} } \times \frac{ {n}^{2 - 6} }{ {n}^{8} }$

$= {n}^{5 - ( - 2)} \times {n}^{2 - 6 - 8}$

$= {n}^{7} \times {n}^{ - 12}$

$= {n}^{7 + ( - 12)}$

$= {n}^{ - 5} = \frac{1}{ {n}^{5} }$

5 0

3 years ago

4x²-y²=171 and 2x-y=9, value of 2x+y

11111nata11111 [884]

So you will need to solve for x and y before evaluating 2x+y....

2x-y=9, y=2x-9 now this will make 4x^2-y^2=171 become:

4x^2-(2x-9)^2=171

4x^2-(4x^2-36x+81)=171

36x-81=171

36x=252

x=7, now we can use 2x-y=9 to solve for y...

2(7)-y=9

14-y=9

-y=-5

y=5

now we know that x=7 and y=5, 2x+y becomes:

2(7)+5

14+5

19

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3 years ago

What is the slope-intercept equation of the line below?

marissa [1.9K]

The correct answer is B. y=-3x+4

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3 years ago

Godfrey is planning to make muffins for the community bake sale. He only has 1 3/4 cup of sugar. If one batch requires him to us

aivan3 [116]

Answer:

3 1/2 Batches.

Step-by-step explanation:

1 3/4 (or 1.75) divided by 1/2 (or 0.5) equals 3.5

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3 years ago

Help me I need the answer ASAP ! Aundrea painted the background of a square mural on the wall using 138ft^2 of paint .which meas

Klio2033 [76]

Hey there! I'm happy to help!

Since this mural is a square, all the sides are the same. This means that you square on of the sides to get the area (multiply it by itself). If we have the area and want to find a side, we just go backwards and use something called the square root!

If we plug this into our calculators...

√138≈11.74734

We see that is closest to B. 12 ft.

You could also figure this out without a calculator. 138 is very close to 144, which is 12². All the other answer options are way too big.

Have a wonderful day! :D

8 0

3 years ago

If P =4 q=-2 r = 3 s =-5find pq + rs​

If P =4 q=-2 r = 3 s =-5find pq + rs