
- Solve 2m + n = 2 and 3m - 2n = 3 using substitution.

We can use the substitution method to solve linear equations of this form. Let's solve for m & n.

To solve a pair of equations using substitution, first solve one of the equations for one of the variables. Then substitute the result for that variable in the other equation.

Choose one of the equations and solve it for m by isolating m on the left-hand side of the equal sign.

Subtract n from both sides of the equation.

Divide both sides by 2.

Multiply 1/2 times -n+2.

Substitute
for m in the other equation, 3m-2n=3.

Multiply 3 times
.

Add
to -2n.

Subtract 3 from both sides of the equation.

Divide both sides of the equation by
, which is the same as multiplying both sides by the reciprocal of the fraction.

Substitute 0 for n in
. Because the resulting equation contains only one variable, you can solve for m directly.

The system is now solved.

If she got a 100 on her last test the highest her average would be is an 87%
Answer:
Step-by-step explanation:
The submarine is underwater for 6 seconds. The submarine hits the water after 1 second and comes back up at the 7th second.