180 is the answer 3(30+18+12) distributive property gives you 90+54+36 which equals 180 <span />
Answer:
5. C
6. A
Step-by-step explanation:
To find the answer, plug in the x- and y-values into each equation. When the equation comes to be true that is your answer.
So for question 5, you plug -5 into the x and 13 into the y for each equation. The first equation will give you an answer of 13 = -7, which isn't true.
The second will give you 13 = 7, so you keep going.
The third gives you 13 = 13, which is true, so that one must be the answer.
Do this for every question and it will give you the answer.
Answer:
37.66
Step-by-step explanation:
Answer: 3 1/2
Hope this helps:)
What we know:
Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 7 liters of natural oil for every 5 liters of synthetic oil.
What we need to find:
If 355 liters of synthetic oil are used, how many liters of petrolyn oil will be made?
Set up a proportion to find how much natural oil is used.
7L natural oil/5L synthetic oil = x/355 synthetic oil where x=natural oil
7/5=x/355
(5)(x)=(7)(355) cross multiplied
5x=2485 simplified
5/5x=2485/5 multiplicative inverse
x=497L
Now, add both synthetic oil and natural oil to find amount of petrolyn oil.
355 L synthetic oil + 497 L natural oil= 852 L of petrolyn oil
