Marks brother is five years older than Mark. Their combines ages add up to 23. How old is Mark?

Factor over the complex numbers, if possible: x^2+2xyi-y^2

The temperature at 6:006:00 a. m. was - 3.5°C-3.5°C. From 6:006:00 to 7:007:00, the temperature increased 2.5°C2.5°C. From 7:007:00 to 8:008:00, it decreased by 0.25°C0.25°C, and from 8:008:00 to 11:0011:00, the temperature dropped 3.25°C3.25°C.

Solve the inequality 7 (x 4) > 0.

6x9x (-5) what is the answer to this question?

Solve this problem for N N - (2 x 7) = 7 A. 20 B. 21 C. 22

The equation (x-6) (8+x) = (x-6) (8) + (x-6) (x) illustrates the use of which property?

Consider the equation x^2=36

If AB=BC, AB=4x-2, and BC = 3x+3, find AB

A circular flower bed is 24 m in diameter and has a circular sidewalk around it that is 4 m wide. Find the area of the sidewalk in square meters

An amount of $49,000is borrowed for 13 years at 7.25% interest, compounded annually. If the loan is paid in full at the end of that period, how much must be paid back? Use the calculator provided and round your answer to the nearest dollar.