Answer:
-28
Step-by-step explanation:
well first u gotta use order of operations. So first u would do
10 x 4 which = 40
next u would hafta do 40 / -2 which = -20
and finally -20 + -8 =-28
hope this helped!!
7x+5y=-24 (1)
4x+y=42 (2)
multiply equation (2) by 5 to get
20x+5y=210 (3)
then calculate (3)-(2) which gives you
13x=234 hence x=18
then substitute for x in either equation to get y=-30
Second one tell me if im wrong
Answer:
180 cars
Step-by-step explanation:
Like you can see in the picture, I like to set up a proportion, so 81 over X and 45 over 100. Then, you can cross multiply, so 81 x 100 = 8100 and then divide, 8100 ÷ 45 = 180, your answer!