Solve this system of equations by using the elimination method -2x-2y=-6, 3x+4y=8
1 answer:
Step-by-step explanation:
- 2x-2y=-6
3x+4y=8
multiply equation (1) by 3 and equation (2) by 2
- 6x-6y=18
6x+8y=16
Add
2y=34
y= 34÷2
y=17
substitute 17 for y in equation (2)
3x+4y=8
3x+4(17)=8
3x+68=8
3x=8-68
3x=-60
x=-60÷3
x=-20
x=-20,y=17
You might be interested in
Answer:23 cm
Step-by-step explanation:
Because it would equal the same amount because there are 10 mm in a cm
There are many. For example, 32 x 0.5 is 16. You can multiply 4 x 4 to get 16, so it is rational.
Answer:
C
Step-by-step explanation:
The answer: d. < 1 and < 8
Answer:
70%
Step-by-step explanation:
56 vanilla cupcakes
------------------------------- = 0.7, or 0.7(100%), or 70%
80 students
70% of students picked vanilla.