Which of the following choices is equivalent when solving the system by the elimination method? x + 2y = 1
2x + y = 12

a)x + 2y = 1
-4x − 2y = -24

b)x + 2y = 1
-2x − 2y = -1

c)x + 2y = 1
4x − 2y = 24

d)None of these choices are correct.

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week