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Andrews [41]
2 years ago
10

Plz help me out to get the answer

Mathematics
2 answers:
Gnoma [55]2 years ago
8 0

Answer:

<h2>y = -8</h2>

Step-by-step explanation:

Put x = -1 to the equation -2x + 7y = -54

(-2)(-1) + 7y = -54

2 + 7y = -54            <em>subtract 2 from both sides</em>

7y = -56              <em>divide both sides by 7</em>

y = -8

vaieri [72.5K]2 years ago
6 0

-2(-1) + 7y = -54

2 + 7y = -54

7y = -56

y = -8

When x = -1, y = -8.

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Part B if the height of each prism is 10 Cm what is the surface area prism
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Answer:

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Prism B:

Area =250cm^2

Step-by-step explanation:

Given

See attachment for prisms

Height(h) = 10cm

Required

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Prism A is triangular and as such, the surface area is:

Area = 2 * A_b + (a + b + c) * h

Where

A_b = \sqrt{s * (s - a) * (s -b) * (s - c)}

and

s = \frac{a + b + c}{2}

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From the attachment;

a = 8; b =6; c =10

So, we have:

s = \frac{a + b + c}{2}

s = \frac{8 + 6 + 10}{2}

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A_b = \sqrt{s * (s - a) * (s -b) * (s - c)}

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Answer:

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