MATHEMATICS MIDDLE SCHOOL

What is the surface area of a triangular pyramid if each face has an area of 80 m2? A. 240 m2 B. 160 m2 C. 320 m2 D. 20 m2

Answers

Answer 1
Answer: If each face is 80m² and there are 4 identical faces, the answer would be 4 x 80 = 320m² - C

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MIDDLE SCHOOL

Algebra Find the values of the variables.
(3x + 2) -

Answers

Is something missing in the question?
HIGH SCHOOL

Simplify ( 1/2A + 1/2B )^2

Answers

Notice that both A and B are multiplied by (1/2).

Thus, the given expression can be re-written as [(1/2)(A+B)]^2.

Square the (1/2) and the (A+B) separately, and then multiply together the resulting squares:

(1/4)(A^2 + 2AB + B^2)

A^2     ab     b^2
___+  ___+ ___
  4        2       4

this is your answer
HIGH SCHOOL

Find the length of the side marked x. the perimeter is 12 feet.

Answers

I might be wrong but I think it is 93 cause each sides of the triangle equals 31.
This seems like it is a Pythagorean theorem problem.  Using the height and half the base for a^2 +  b^2 = c^2 so 2^2+3^2 = c[x]^2. the answer is square root of 13. 
HIGH SCHOOL

A wallpaper salesman earns a base pay of 15,600 per year and a commission of 16% of all sales made. If he sold 25,400 worth of merchandise last year, what were his total earnings last year

Answers

$15,600
+
$25,400x16% ($4,064)

= $19,664

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