How to write 12+n=19 in a sentence?

The average of 3 numbers is 7. two of the numbers are 8 and 9. what is the third?

How is net worth calculated

Jason spent $20.00 for school lunches. if each lunch cost 2.50, how much lunches did he buy

If a humming were to get all of its food from a feeder then a 16-ounce nectar feeder could feed about 80 hummingbirds a day. How many hummingbirds would you expect to be able to feed with a 12-ounce feeder?

7.21 repeating as a fraction

Four times a number, subtracted from nine, is twice the number. How do I solved this?

What are zeros of f (x) = (x-3) (x+8) ?

Find the missing measures for the rectangle. l = _?_ w = 2 cm A = _?_ P = 25 cm A) 12.5 cm; 25 cm2 B) 10.5 cm; 21 cm2 C) 12.5 cm; 21 cm2 D) 10.5 cm; 25 cm2

A lottery offers two options for the prize. Option A: $1000 a week for life. Option B: $600 000 in one lump sum. Which option would the winner choose if s/he expects to live for another 50 years?

Write the answer in standard form on the line. 100,000 less than five hundred sixty thousand, three hundred thirteen is