Solve each system by substitution method x+y=4 y=3x

What is the value of n in this proportion? 8/12 = 10/n

Nellie is buying bird seed to put in her bird feeders. She uses about 10 pounds of bird seed each week, but has room to store any extra that she purchases. The bird seed comes in 3 different sizes as given below: 3.5 pounds for $2.52 7.

What are the factors in the expression 4x squared 2 + 5x - 7

Select all that apply. Which of the following are equivalent ratios? A. 10/15 B. 12/16 C. 8/12 D. 14/21

The radius of a clock face is 8.5 centimeters. What is the area of the clock face?

A students tuition was $4200. A loan was obtained for 6/7 of the tuition. How much was the loan?

Solve the equation for y. 4.2x-1.4y=2.1

A company sells a bicycle to a store for $17.39. the store marks it up $27.63.

Which of the following is the simplified fraction its equivalent to 0.315. a) 35/999, b) 35/111, c) 105/333, d) 31/99

What is the sum? 7/4 (-1/5) ?