How do you solve this system by elimination?

-3x+4y=12

2x+y=-8

I dont know how to solve it.

the arithmetic mean is 12 and the number of observations are 20 then the sum of all of the values id A.) 8 B.) 1667 C.) 32 D.) 240

What is j / 6 = 9/10

What is the slant height of a square pyramid that has a surface area of 189 square feet and a side length of 7 feet? A. 14 ft B. 12 ft C. 10 ft D. 8 ft

Factor completely or identify as prime. 16p3 - 48p2 - 25p + 75 A. (p - 3) (4p - 5) 2 B. Prime C. (p - 3) (4p + 5) (4p - 5) D. (p - 3) (4p + 5) 2

Which of the following is equivalent to 1 5/8?

Lisa is loading 75 chairs into a truck. If h represents the number of chairs that she can carry in one load, which expression represents the total number of loads needed to move all the chairs?

Bruce wants to make sure that each tiger at the zoo has 1,000 square feet of space. He wants to write an equation to represent the relationship between the number of tigers, t, and the number of square feet of space, f.

What is 120 times 250

The circumference of the earth is approximately 24,901 miles. The circumference of the earth's moon is about 72.76% smaller than the earth's circumference. What is the approximate radius of the earth's moon? A. 1,079.55 miles B. 6,783.03 miles c.

What greater than. 375?