The solution to 5x - 7 = 21?

How do I vote someone Brainliest? I'm new, and I can't seem to figure it out.

A student has some $1 and $5 bills in his wallet. he has a total of 1919 bills that are worth $5959. how many of each type of bill does he hav

Is the product of - 5 + XNX + 4 equal to the product of 5 + X and X - 4

The first and second year's sales for a company were $328,000 and $565,000. The expenses for the first year were $117,000. The company had a net profit of $113,000 after two years. What were the company's expenses for the second year? A. $230,000 B.

Carly's number is four less than Henry's number. The sum of their numbers is 77. Find the number

Two accounts each begin with a deposit of $5000. Both accounts have rates of 5.7 %, but one account compounds interest once a year while the other account compounds interest continuously.

Blue whales eat an average of 5,000 pounds of fish daily, with a standard deviation of 850 pounds. Approximately what percentage of blue whales eat more than 7,550 pounds of fish? 15.87% 5% 0.3% 0.15%

A car travels 450 miles in the same time that a motorcycle travels 390 miles. if the car's speed is 10 miles per hour more than the motorcycle's, find the speed of the car and the speed of the motorcycle. the speed of the motorcycle is ___ mph.

How many gallons in a 100 lb propane tank?

What is the quatient of (*3+6*2+11*+6) : (*2+4*+3