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3 years ago

I need to know this answer asap

Mathematics

1 answer:

kvv77 [185]3 years ago

8 0

Answer:

Step-by-step explanation:

It is the only equation given with multiple exponents and terms

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Follow the directions to solve the system of equations by elimination. 8x + 7y=39 4x – 14y = -68

harina [27]

Step-by-step explanation:

Hey there!

Here;

The equations are;

$8x + 7y = 39.......(i)$

$4x - 14y = - 68..........(ii)$

Multiplying equation (i) by 2.

16x + 14y = 78

4x - 14y = -68

20x = 10

$x = \frac{10}{20}$

x = 1/2.

Putting value of 'x' in equation (i).

$8 \times \frac{1}{2} + 7y = 39$

$4 + 7y = 39$

$7y = 3 9 - 4$

$y = \frac{35}{7}$

Therefore the value of y is 5.

Check:

Put value of x and y in equation (i).

8x + 7y = 39

$8 \times \frac{1}{2} + 7 \times 5 = 39$

$4 + 35 = 39$

$39 = 39$

(True).

Therefore, the solution is ; (1/2,5).

Hope it helps...

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4 years ago

A truck drove at an average rate of 45 miles per hour on the highway and 20 miles per hour once it entered the city. If it took

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Square root (8-0)^2 + (8+7)^2

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Step-by-step explanation:

6.) 8p = 8x9 = 72

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The graph of the function f(x) = x2 + 8x + 12 is shown. Which statements describe the graph? Check all that apply.

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The domain is all real numbers.
The x-intercepts are at (–6, 0) and (–2, 0).

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