Answer:
1. 2.6
2. 29.1
3. 2490
4 3.4
Step-by-step explanation:
The answer is A A number line with a closed circle on 3-
Find the soluiton
2x+2y=16
3x-y=4
x+y=8
<u>3x-y=4+</u>
4x=12
x=3
3(3)-y=4
9-y=4
y=5
(3,5)
test them to see if get true statment
obviously the first equatons of 1,2,4 work
1 doesn't work
2, works
4. doesn't work
2 is the same as the first except both euations are just doubled
answer is 2
Answer:

Step-by-step explanation:
7 x 21 is equivalent to 21 x 7
also 3 x 49