Solve each system by substitution.

6x - y + 2 z = 4

2 x + 3 y - 3 z = - 5

4 x + 2 y + 5 z = - 9

Percent of change 8 feet to 10 feet

Sarah says that you can use the area of a circle to figure out its circumference, but Dan does not agree. Who is correct?

If PR = 4x - 2 and RS = 3x - 5, which expression represents PS? x - 7 x - 3 7x - 7 7x + 3

Mary mixies white paint and blue paint in the ratios 2:3. She makes a total of 20 litres of paint. How much more blue paint does she needs to add to the mixture so the ratios of white paint to the blue paint become 1:7?

Numerical WebAssign will do simple calculations for you, using +, -, *, /, parentheses, and e-notation. For example, if a question asks for half the sum of 246 and 388, you can enter " (246+388) / 2".

60,000 pounds is how many tons

Greg sets his watch for the correct time on Wednesday. one week later, he finds his watch lost 3 1/4 minutes. if this continues what will be the overall change in time after 8 weeks.

1) What is the product of 0.976 and 1.2? A) 1.1712 Eliminate B) 0.11712 C) 11.712 D) 117.12

Kara started working for $9 per hour she earns a 4% raise every year what his her hourly rate wage after 3 years

Each wheel of Gia's bicycle is 24 inches in diameter. Gia rides her bike 1,884 feet. To the nearest whole number, how many times does her front bicycle wheel turn all the way around?