How do you add fractions and why does africa not have much houses and poor people?

A ladder 26ft long leans against a vertical wall. The lower end is being moved away from the wall at a rate of 5ft/sec how fast is the top decreasing when the lower end is 10 ft. from the wall

Maria invested $450 in a savings account and earned $126 in interest at the end of 7 years. What was the interest rate? A. 3.5% B. 4% C. 4.5% D. 5%

Find the equation of the line parallel to y=-5x+3 and passing through (4 3)

A pack of pencils sells for $4.00. what is the sales tax rate if the total cost was $4.32

This week in school, there is a 75 percent probability of having a fire drill, a 50 percent probability of a tornado drill, and a 25 percent probability of having both drills. Let event F be a fire drill and event T be a tornado drill.

10+2 (47-40) ^2-50:2=?

Which number identifies the amount of fuel remaining in the tank? cross out A. 0.312 cross out B. 0.375 cross out C. 0.550 cross out D. 0.625

Which is greater 30.50 or 3.50

513=51.3x =5.13x =0.513x

Round 3,989.23655 to the nearest thousandth.