How old was Lisa x years ago us she is now 13?

Which expression represents this?

A) x+13

B) x-13

C) 13-x

The cross-sectional area of a hole is 725 cm². Given that the area of a circle is A = πr², find the radiusof that hole.

What's the standard form of the line that passes through (7,-3) and has a y-intercept of 2?

Ryan bought a digital camera with a list price of $150 from an online store offering a 5% discount. He needs to pay $5.50 for shipping. What was Ryan's total cost?

A certain atore has a fax machine available for use by its customers. the store charges $2.30 to send the first page and $0.40 for each subsequent page. use an inequality to find the maximum number of pages that can be faxed for $5.10

What is the circumference of the earth?

Adriana uses 1 1/4 cups of pretzels for every 1/2 cup of raisins when making a snack mix. What is the number of cups of pretzels Adriana uses for 1 cup?

What is a sum for 4/3.

The average adult working male spends approximately $60 per week on a moderate cost healthy diet plan. The average cost for 3 fast food meals per day is approximately $20. On average, what can you save per week with the healthy diet plan?

If the probability of a chance event is 0.82 it is more likely to happen than which of the following probabilities of another chance event? A) 0.9 B) 0.85 C) 0.8

Which of the following are mathematical sentences? A. 10r B. 6r C. 61 D. x=12 E. 9g=45 F. r+9=6