The degree measurements of three angles of a triangle are represented by the expression 5x, 2x + 3, 3 x -3. find the measure of all three angles

The 3 angles of a triangle will add up to 180 degrees.

5x + 2x + 3 + 3x - 3 = 180...combine like terms
10x = 180
x = 180/10
x = 18

one angle is : 5(x) = 5(18) = 90 degrees
the other angle is : 2x + 3 = 2(18) + 3 = 39 degrees
the last angle : 3x - 3 = 3(18) - 3 = 51 degrees

C. i believe it is (5×(-20))+(100×(0.7))