Fifteen more than three times a number is 45

At noon, ship a is 180 km west of ship b. ship a is sailing east at 35 km/h and ship b is sailing north at 30 km/h. how fast is the distance between the ships changing at 4:00 pm?

the width of a rectangle is three less than four times the length. the perimeter of the rectangle is 29 centimeters. find the dimensions of the rectangle.

Read the problem below. Angelo is riding in a hot air balloon. The balloon begins at 700 feet above the ground. It drops 200 feet, rises 500 feet, and then drops 100 feet.

Write the improper fraction as a mixed number, 17/5

At Pizza hut, 9% of the pizzas made last week had extra cheese. if 27 pizzas had extra cheese, how many pizzas in all were made last week?

Give an example of a real number that is not rational

Tyler baked 702 cookies. He sold them in boxes of 18. After selling all of the boxes of cookies for the same amount each, he earned $136.50. What was the cost of one box of cookies?

Juan selects 2 colored pencils randomly. There are 4 green, 3 yellow, 4 red, 3 blue and 2 orange. What is the probability Juan chooses a red, replaces it, and then chooses an orange? A: 1 over 32 B: 1 over 30 C: 8 over 225 D: 3 over 8

How do you find the lcd

Process of substitution y=2x-4 4x+5y=22