Solve the system of linear equations using linear combination
3a + 6b = 45
2a - 2b = -12
which is the solution to the system?

(-3, 3)

Step-by-step explanation:

Let's solve this system using elimination through addition and subtraction.

Notice that if we multiply 2a - 2b = -12 by 3, we get 6a - 6b = -36, which cancels out the +6b in 3a + 6b = 45:

3a + 6b = 45

-6a - 6b = -36

-3a         = 9.  Thus, a = -9/3, or a = -3.

Subbing -3 for a in the second equation, to find b, we get:

2(-3) - 2b = -12, or

-6 - 2b = -12, or -2b = -6.  Thus, b = 3.

The solution is (-3, 3).

Next time, would you please share the possible answer choices.

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.