Ok smart math people, why does this work. u have 78 subtract your age add 40 and its year your born

The product of seven less than a number and eight

The formula for the surface area of a cylinder is A=2πr (r+h). Find h if A=80π and r=5.

The two longer sides of a measure 204 feet and 192 feet. The two shorter sides measure 92 feet and 54 feet. What is the perimeter of the lot?

A car dealership advertises a used Toyota Tercel for only $400 down and $170 per month for 4 years. What is the total cost of the car? Given answer: The total cost of the car is $8,016.

Solve the equation. First estimate using the perfect square closest to 45. Then use a calculator. n2=45

Solve for x: 2 over 3 (x - 4) = 2x. 2 - 2 - 8 - 4

kyle mom made a pone and a cake. she cut the pone into 6 equal parts and the cake into 8 equal parts. his family ate 3/4 of the cake. if his family ate more cake than pone. what fraction of the pone coulh have been eaten.

A Cashier at the local bank is expected to serve 12 customers every hour. In the past 15 minutes, he served 4 customers. Assuming the the cashier continues to work at the same rate, will he meet his goal? Explain

A wise man once said "300 reduced by 3 times my age is 138"

Write 4.1 - 3 using words