Solve the system of equations by the substitution method.

x+y=4

y=-3x

a phone company charges for service according to the formula: C (n) = 10+0.08n, where n is the number of minutes talked and C (n) is the monthly charge, in dollars what is the slope?

he graph represents the function f (x) = x2 + 3x + 2. If g (x) is the reflection of f (x) across the x-axis, g (x) =. (Write the function in standard form. Use ^ to indicate an exponent.)

Mode and median mean and range of 14,19,16,13,16,14

W/5=w-14/9 this is a proprtion

Derick studied 13 1/2 hours this week for a spelling bee. Write the number of hours as a decimal.

The seventh term of an arithmetic sequence is 10.2 and the twelfth term is 17.7. What is the common difference of the arithmetic sequence? The common difference is

Assume that the heights of men are normally distributed with a mean of 70.7 inches and a standard deviation of 2.1 inches. If 36 men are randomly selected, find the probability that they have a mean height greater than 71.7 inches.

Write an equation of the line that passes through (-6,5) and (0,2).

Which interval is the solution set to 0.35x - 4.8 < 5.2 - 0.9x? i solved this i just wanted to post the answers for others

If 5 times a number n is subtracted from 15 the results is negative. Which of the following gives the possible values for n