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

Si el área total de un prisma recto es de 4368 cm cuadrados y la altura lateral es de 10 cm, sabiendo que la base es un octágono regular, encuentre: la longitud de uno de sus lados si la apotema es de 17.3 cm.

Chris purchased two uniforms for his new job. He was given a $5 discount on the total purchase for being a new employee. If he spent $95, what was the original cost per uniform?

Confuscius was born in 551 BC and died 72 years later. What year was that?

20. A cheetah can chase after its prey at about 80 kilometers per hour. Use a proportion to calculate about how many kilometers a cheetah could run in 1 minute.

Natalie is paid $2 more per hour than Travis when Natalie works for 40 hours and Travis works for 35 hours they aren't $755 between them how much is each earn per hour

A bank loans you $5000 for school to be repaid with 4% interest how much do you owe after 2 years? 4 years? and 7 years?

1. The speed of a planet's moon in orbit is about 29500 feet per second. How many miles per hour does the planet's moon travel?

What times what equals 152

What is equivalent to (3 root 8^1/4 x) ?

4. Find 2 solutions to 2x>-20