Larry is solving this system of equations: y=2x-3
3x-y=4
He used the following steps to solve the system:
2x+y=-3
3x-y=4
5x=1
x=1/5
y=-17/5
He made a mistake. Find the mistake and explain what he did wrong.

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm

Jessica and martha each have a bag of cookies with unequal quantities. they have 30 cookies total between the two of them. each of them ate 6 cookies from their bag. the product of the number of cookies left in each bag is not more than 80. how many more cookies will jessica have martha? if x represents the number of cookies jessica started with, complete the statements below.the inequality that describes the relationship between the number of cookies each one of them has is x^2 - x +224 > = 0.jessica has at least cookies more than martha.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?