Help asap!!! compute $\left(-3\sqrt{128}\right)\left(-4\ sqrt{50}\right)$

The mean temperature for the first 4 days in january was 7°c. the mean temperature for the first 5 days in january was 5°c. what was the temperature on the 5th day?

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?

Indicate the formula for the following conditions: p^c(n, r)=