How do I simplify the form of expression?

(4x + 5) (x - 7) - 4x^2 + 10x = 9

The circumference of a circle varies directly as the diameter of a circle. When the diameter of a circle is 5, the circumference of the circle is approximately 15.7.

A pyramid has a square base that is 3232 centimeters on each side. The slant height is 2424 centimeters. What is the lateral surface area? A. 768 square centimeters B. 1,536 square centimeters C. 2,560 square centimeters D. 8,192 square centimeters

Reflection definition in your words

1/2 x + 3/4 y = - 2 2/3 x + 5/6 y = - 2 Solve the system.

At a concert, there are 3 times as many women as men. 3/5 of the men and 1/3 of the women wear glasses. there are 120 more women wearing glasses than men wearing glasses. how many people are at the concert?

A = 16, b = 30, c = ? what is c equivalent to

A fair coin is tossed four times. what is the probability that the sequence of tosses is hhtt?

16^x=64^x+4 a x=-12 b x=-2 c x=2 d x=12

The cost of a ski-lift ticket is $31. how much will 17 tickets cost?

Which equation is true? 0.1 / 0.35 - 0.35 0.5 / 0.35 = 7 0.7 / 0.35 = 2 0.35 / 0.7 = 5