10r-5r+3r-8r how do I do this?

If it's - 5 and increases 10 degrees, how do you find the new temperature?

If $7300 is invested into a savings account for which interest is compounded monthly, and if the $7300 turns into $8600 in 2 years, what is the interest rate of the savings account?

If the volume of a cylinder 30 cm high 4620cm^3 find radius

Suppose a brand of light bulbs is normally distributed, with a mean life of 1300 hr and a standard deviation of 50 hr. Find the probability that a light bulb of that brand lasts between 1225 hr and 1365 hr.

When i think of a number, double it and add three i get 11. what number did i think of

What is the value of x in the figure below? Leave answer in simplest radical form.

0.08 divided by 3.16

Write the set in roster form: N is the set of real numbers that are factors of 12. A. {2, 4, 6} B. {1, 2, 3, 4, 6} C. {1, 2, 3, 4, 6, 8, 12} D. {1, 2, 3, 4, 6, 12}

Write the explicit formula for the geometric sequence. 2,8, 32, 128, A) an = 2n-1 B) an = 2.61-1 C) an = 2 - 2n-1 D) an=2.40-1

Angle θ is in standard position. If tanθ < 0 and cosθ = - 4/5, find sinθ.