The ratio of bous to girls in the school is 1 to 4. If there are 20 girls, how many boys are there?

If I buy something for $25.40 with 15% tax, what would it be?

Two angles are supplementary. One angle measures 2x, and the other angle measures 3x - 15. Which equation can you use to find the measure of each angle? a) 2x + 3x - 15 = 90° b) 2x - 3x - 15 = 180° c) 2x - 3x - 15 = 90° d) 2x + 3x - 15 = 180°

What is the answer to 3 (2n-7) + 7 (4-2n)

A plumber charges $52.50 per hour plus a $75 service charges. you father's firm hires him to fix leaky pipes. Find the total charge if it takes him 4.5 hours to complete the task?

If 200 vitamins cost $4.75 what should 500 vitamins cost

If f (x) = 5x + 4, what is the inverse of f (x)

Marcie bought a jacket using the British currency pounds the jacket costs 45 pounds if 1.00$ = 1.64 pounds what was the cost in dollars

What is coterminal angle

Evaluate: 4 + 8: 2 * (6 - 3)

What is the first step in which the student made an error