What is the sum of the first nine terms of the geometric series where a1 = 7 and r = - 3?

At a local fitness center, members pay aa $10 membership fee and $5 for each aerobics class. Nonmembers pay $6 for each aerobics class. For what number of aerobics classes will the cost for members and nonmembers be the same?

Find the volume of a regular triangular pyramid if it has height h=12 cm, base edge b=10 cm and height of the triangular base hb ≈ 8.7 cm.

Edgar borrowed a total of $10,000 from three sources: the bank, his mom, and a close friend. After one year, he paid a total of $624 in simple interest toward the three loans.

What is 1/3*4 I need it for homework I am working on Fraction Multiplication

Convert the decimal expansion 0.2777 ... to a fraction

Solve the inequality. -6 < 2 x - 4 < 4 A) - 5 < x < 0 B) - 4 < x < 6 C) - 1 < x < 4 D) - 12 < x < - 2

Law of sines: StartFraction sine (uppercase A) Over a EndFraction = StartFraction sine (uppercase B) Over b EndFraction = StartFraction sine (uppercase C) Over c EndFraction In △BCD, d = 3, b = 5, and m∠D = 25°.

Name the property used to make the conclusion. If x=y and y=4, then x=4.

Find tje prime factorazation 79

What is equal to 20/40?