Betty can mow a lawn in 90 minutes. Vanessa can mow the same lawn in 60 minutes. How long does it take for both Betty and Vanessa to mow the lawn if they are working together?

What is the repeating digit for 7/12

Solve: x^2-x-6/x^2=x-6/2x+2x+12/x After multiplying each side by the equation LCD and simplifying, the resulting equation is ...

The table shows two options provided by high speed internet. option 1 have set up fee of $50 with $30 per month. option 2 have no set up fee and is $80 per month.

The grades of a science test are normally distributed. Thanh finds that his grade on the test has a z-score of - 2.5. Which statement must be true?

Simplify the expression. 6 + (14 - 6) • 3 + 2 • 3

Solve the problem. Sergio's internet provider charges its customers $7 per month plus 3¢ per minute of on-line usage. Sergio received a bill from the provider covering a period and was charged a total of $28.70.

Two lines, parallel to the bases of a trapezoid divide each leg into three congruent parts and divide the trapezoid into three parts as well. Find the area of the middle part if the top and bottom parts have area S1 and S3.

Robin is making bows to sell at her mother's yard sale. She will use 3/4 foot of red ribbon and 2/3 foot of blue ribbon to make each bow. What is the ratio of the length of red ribbon to blue ribbon?

Explain why the polynomial 144x2 - 200x + 81 is not a perfect square. A. 81x ≠ 2 (20x ∙ 9) B. 144x ≠ 2 (20x ∙ 12) C. 200x ≠ 2 (9x ∙ 12) D200x ≠ 2 (12x ∙ 9)

Two factors of - 48 have a difference of 19. The factor with a greater absolute value is positive. What is the sum of the factors? a. - 19 b. - 13 c. 13 d. 16