David is twice as old as Sara, and Jessica is three times as old as Sara. If their ages add up to 30, how old is David?

x = Sara's age

2x = David's age

3x = Jessica's age

Determine if each pair of rates are equal $36 for for baseball hats and $56 for seven baseball hats

What is the slope of a line that is perpendicular to the line v = 2x - 62 O A. - 1/2 O B. 2 O c. 2 O D. 1/6

In the mall, 1/15 of the stores sell shoes. there are 180 stores in the mall. how many of the stores sell shoes

Bob is asked to construct a probability model for rolling a pair of fair dice. He lists the outcomes as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. Because there are 11 outcomes, he reasoned, the probability of rolling a three must be one eleventh .

Design a product to show your understanding of the zero product property. Include specific values of the variables.

What is the product? (4%) (-3x0) (-7x)

The ratio of guppies to angelfish in a shop is 2 : 3. The number of angelfish was 23the number of goldfish. The shopkeeper decided to replace 14of the guppies with some angelfish.

How many cups of lemonade were sold in all? Write and solve an equation

A 3pack of boxes of juice costs 1.09. A 12 pack of boxes cost 4.49. A case of 24 boxes costs 8.78. Which is the best buy? Explain your reasoning

What is the answer to: 2.8 x 103 x 3.07 x 105 (written in scientific notation) ?