5x and 3x+10 are "vertical angles", opposites about the intersection of two lines, thus they are equal so:
5x=3x+10
2x=10
x=5
so 3x+10 is
3(5)+10=25°
FEG and GEC are complementary angles meaning they sum to 90° so
FEG=90-25=65°
8 (D)
12(C) (Considering it is (square root of x) - 87, and not square root of (x-87).)
18(C) (Again, same as above. You need to write in parentheses, if applicable.)
13 I can't understand the question. Am I missing an equation?
Best answer me please.
2) I believe that this is false. The amount of interest is the amount of extra money that has to be paid (total interest). The interest rate is <em>how</em> you calculate that.
3) true, because decimal equations are simpler.
The coefficient of y∧15×∧2 in expansion of (y∧3+x)∧7 is (15×2)+(3×7)= 51
It would be 14 because if you look at a picture of the 30-60-90 triangle the short side is labeled with the variable x and the hypotenuse is labeled 2x. We know that the shorter leg is 7, so 2 multiplied by 7 is 14:)