A few more math problem

solve each system by elimination

1. 7x+y=10

-7x-10y=26

2. 4x-2y=-14

3x-2y=-14

3. 6x+2y=20

-3x+3y=-30

4. - 5x+4y=-3

-9x-4=-30

5. - 9x+6y=27

-x+3y=10

6. 5x+y=-12

5x-7y=4

At a automobile factory, 1211 parts are made in 6 hours. What is the average rate at which parts are made per hour?

Which is an example of the associative property? (-8 + 10) + 4 = - 8 + (10 + 4) -17 + 0 = - 17 -5 + 7 = 7 + (-5) - (18 + 3) = - 18 + (-3)

Use the substitution method to solve the system of equations. Choose the correct ordered pair. 2y + 4x = 18 2y - 3x = 4 A. (6, - 3) B. (5, - 1) C. (2, 5) D. (3, 3)

Which number has the same value as 28 tens?

The sum of k and 5 is 11

What is the approximate area of a circle with a radius of 11 centimeters? Use π ≈ 3.14. A: 87.9 square centimeters B: 379.9 square centimeters C: 2461.8 square centimeters D: 4923.5 square centimeters

If the probability of an event is 5/9, what is the probability of its complementary event

You find a job that pays $11.25 per hour. You plan ti work a 40 hour week. What will your weekly gross pay be?

A man in a photograph is 1.5 inches in height. If the man is 6 feet tall, what is the scale?

Wake up cereal comes in 2 types, crispy and crunchy. If researcher has 10 boxes of each, how many ways can this be done?