Expand the expression 2(r - 4) + 5(r + 2). Express your answer in simplest form
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So, you have to draw a line like this in the picture that I have provided. Down there. Then, you gotta do the Pythagorean theorem for that. Since it is a rectangular prism, we know that the angle in the triangle in 90 degrees, so we can use the Pythagorean Theorem. So, the Pythagorean Theorem is a^2+b^2=c^2. 2^2+3^2=x^2 4+9=x^2 13=x^2 sqrt13=x sqrt13 is 3.605551275. That is the length of the leg on the triangle you are trying to look for. Then, use the Pythagorean Theorem again, 3.60551275^2+6^2=x^2
12.99972219+36=x^2 48.99972219=x^2 sqrt48.99972219=x x=6.999980156, but when you round to the nearest tenth, it is 7. #QuickMaths
12.99972219+36=x^2 48.99972219=x^2 sqrt48.99972219=x x=6.999980156, but when you round to the nearest tenth, it is 7. #QuickMaths