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natima [27]
3 years ago
14

2x + 3y = -9 -x + 4y = 10 Solve the system

Mathematics
1 answer:
Vladimir79 [104]3 years ago
4 0

Answer:

x = -6

y= 1

Step-by-step explanation:

make one of the variables equal to each other

4(2x+3y) = -9

3(-x+4y) = 10

subtract

8x+12y = -36

- -3x+12y =30

----------------------

11x = -66

x = -6

plug back in to find y

8(-6)+12y = -36

12y= 12

y = 1

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The rectangle below has an area of x^2-x-72x 2 ?x?72 square meters and a length of x+8x+8 meters. What expression represents the
Varvara68 [4.7K]

Answer:

Area of the rectangle is given by:

A = l \times w

where

A is the area of the rectangle

l is the length of the rectangle

w is the width of the rectangle respectively.

As per the given statement:

Area of the rectangle(A) =  x^2-x-72 square meters

length of the rectangle(l) = x+8

Substitute these in the given formula we have;

x^2-x-72 = (x+8) \times w

x^2-9x+8x-72 = (x+8) \times w

x(x-9)+8(x-9)= (x+8) \times w

or

(x+8)(x-9)= (x+8) \times w

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w = (x-9) meters.

Therefore, the expression represents the width of the rectangle is x-9 meters


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3 years ago
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Usimov [2.4K]
The answer is 288 :)
3 0
3 years ago
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lora16 [44]

Answer:

8

Step-by-step explanation:

Jeremiah bought x toy sets for $20 each and then a video game for $60. Jeremiah spent a total of $220. How may toy sets did he buy?

To find our answer, we can solve the equation:

20x + 60 = 220

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20x = 160

/20    /20

x = 8

Jeremiah bought 8 toy sets!

I hope this helps :)

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