A boy is three years than his sister. Three years ago he was two-thirds of his sister's age. What are their present ages?

Look at the function f (x) = x3 - 4 x. which describes an interval in which the function is increasing?

How do you solve an equation with Fractions? Ex. 1/2 (7x + 48) Ex. - (1/2 x - 3) + 4 (x + 5)

Type the correct answer in each box. Spell all words correctly, and use numerals instead of words for numbers. If necessary, use / for the fraction bar (s). The solution set for all real numbers x such that 2x + 3 < 19 and 2x - 3 ≤ - 7 is (, ].

What is the square root of 28.09

Jamie took an 8 week keyboarding class

What is a better buy 5 minutes of a game for $10 or 7 minutes for $12

An art student wants to make a model of a rectangular classroom. The length of the classroom is 2.4 times its width. The length of the student's model is 42 in. What should the width of the model be? a. 17.5in b. 20.5 in c. 83. 6in d. 100.8in

The length of a rectangle is 4 times the width. The perimeter of the rectangle is 45 inches. What is the area of the rectangle / 9960871/ce166f9f? utm_source=registration

Dominic books with 12 postcards in each book. He has 4 boxes with 20 coins in each box. If he gives 15 post cards to his friends, how many postcards and coins does he have?

Which system of equations has exactly one solution? - 2x-4y = 8 x+y=7 3x+y=-1 x-2y = -2 3x+3y=3 -Ex-by=3 3x-2y=4 -3x+2y=4