Question

In equilateral triangles STU:

Answer 1

Answer:  B) 39

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Explanation:

Equilateral triangles have three equal sides, ie the sides are all the same length.

Let's set sides ST and TU equal to each other and solve for x

7x-10 = 2x+25

7x-2x = 25+10

5x = 35

x = 35/5

x = 7

Then we use this to compute each side

• ST = 7x-10 = 7*7-10 = 49-10 = 39
• TU = 2x+25 = 2*7+25 = 14+25 = 39
• US = x^2 - 10 = 7^2 - 10 = 49-10 = 39

Each side is 39 units long, so this confirms we have the correct answer.

Answer 2

The answer is b 39 pretty sure that’s correct