Which is a variable expression for the word phrase? the product of 3 and a number decreased by 7

a. 3n + 7

b. 7 - 3n

c. 3n - 7

d. 7n - 3

Radio signals travel at a rate of 3 * 108 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of the Earth if the satellite is orbiting at a height of 7.5 * 106 meters?

What fraction of 1.050 is 68%

12r - 6s = t for r solve the equation for the indicated variable

Not an 8, or a heart

What is 10,504,006 in word form and in exapnded form

Find the value or values of y in the quadratic equation y2 + 4y + 4 = 7. A. y = - 2 + √ 7, y = - 2 - √ 7 B. y = 2, y = 7 C. y = - 2√ 7, y = 2√ 7 D. y = 2 + 2√ 7, y = 2 - 2√ 7

What is the solution of the equation 4x + 17 = 45? -7 -6 6 7

What is the area of the circle? d = 8 m 6471 m2 50.24 m2 100.48 m2

The y intercept of the line 5y + 2x - 3=0

The mean age of 3 women in an office is 35 years old. The mean age of 12 men in an office is 23 years old. What is the mean age (nearest year) of all the people in the office?