Using substitution how do you solve - 4x+y=6 - 5x-y=21

Rene's parents have put a half hour daily limit on how long the tv is watched in their house. What is the maximum number of hours that can be watched over 7 days if they stick to the limit?

Suppose r is plotted in the above coordinate plane and is collinear with a the ratio ar:ab is 1/3 then what are the coordinates of r

Kate begins solving the equation (6x - 3) = (6x - 4). Her work is correct and is shown below. (6x - 3) = (6x - 4) 4x - 2 = 3x - 2 When she adds 2 to both sides, the equation 4x = 3x results.

How to simplify 21/12 to the simplest fraction

The mean gas mileage for a hybrid car is 57mpg. Suppose that the gasoline mileage is approx normally distributed with a standard deviation of 3.5mpg. what proportion of hybrids gets over 61mpg?

Find the radical equivalent of 272/3 and compute it.

Simone takes dance lessons. Her shoes cost $150 per year, her tights and leotards cost $70 per year, her hair accessories cost $15 per year, and the dance lessons cost $1,000 per year. How much will Simone pay for five years of dance lessons?

Solve for all zeros, reduce as much as possible, show all work. x^4 + 14x^2 + 45 = 0

The 3 inside angles of a right angled triangle are in the ratio 7; 18; 11. The smallest angle is 35. work out angle ab b c

Which inequality is true when x = 4 A. x + 5 < 3 B. 9x > 36 C. * / 2 < 3 D. 18 < x + 8