Use mental math techniques

25/6.25

The sum of 12 times a number and 180 is opposite of 720. What is the number.

What is this answer 2x - 5x?

A thermometer reading 8 degrees is brought into a room with a constant temperature of 28 degrees. If the thermometer reads 13 degrees after 3 minutes, what will it read after being in the room for 5 minutes? For 10 minutes?

What is the square root s of the number 144

Va rog, e urgen! Cati elevi sunt intr-o clasa daca pot fi impartiti exact in grupe de cate 2,3 sau 5?

Joana wants to buy a car. Her parents loan her $5,000 for 5 years at 5% simple interest. How much will Joana pay in interest?

Movie Ticket Sales : 6x + 9y = 1,500 Suppose on this day all tickets were on sale for the child price of $6. How many tickets were sold?

Yesterday, two friends went into a bank to open savings accounts. Megan started by putting $80 in her account, and she will deposit an additional $15 each week. Noah made no initial deposit, but he will add $25 more each week.

Write the equation of a line with a slope of - 2 and a y-intercept of 5: A) - 2 + y = 5 B) 2x - y = 5 C) y = - 2 + 5 D) y = 5x - 2

Find (19 x 10*5) - (5 x 10 * 4)