Which of these strategies would eliminate a variable in the system of equations?
8x + 5y = -7
-7+ 6y = -4

choose all answers that apply:

a. multiply the top equation by 6, multiply the bottom equation by -5, then add the equations.

b. multiply the top equation by 7. then add the equations.

c. multiply the bottom equation by 8, then add the equations.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

Olga fue a comprar unas botas que costaban $675 con un descuento del 25%y al pagar en caja como fue el cliente 100 de ese día obtuvo otro descuento ? cuanto pago olga por las botas?