Is this right? Please help me.

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.

Which law states that if a conditional is true and its hypothesis is true, then the conclusion is true? a. the law of syllogism c. the law of detachment b. the law of conditional d. the law of deductive reasoning