Solve the system of equations using substitution.

a) (2,8)

b) (2, -8)

c) (10,24)

d) no solution

option D. no solution

Step-by-step explanation:

y = 2x + 4. (1)

2x - y = 6. (2)

Substituting the value of y into equation 2., the x variable disappears. Therefore there is no solution to the equation.

1- 40 pennies

2- 4 dimes

Step-by-step explanation:

one penny is one cent => 40 pennies is 40 cents

one dime is 10 cents => 4 dimes is 40 cents