Answer:
Step-by-step explanation:
Do the thing
Answer:
If you think of it logically, this problem is saying:
x ⋅ 1 % = 39
1 % is 1/100 so it's
x ⋅ 1/100 = 39
Divide both sides by 1/100 and you get
x = 39/1/100
Remember that when there is a fraction in the denominator we flip it and multiply that on top and bottom:
x = 39 ⋅ 100 (1/100) ⋅ 100
Therefore
x = 3900
You can check this by multiplying our answer by 1 %
3900 ⋅ 0.01 = 39
Answer:
1.5 gallons
Step-by-step explanation:
2 x 0.75
1.5 gallons
Brainliest appreciated!
Answer:
x = -4
Step-by-step explanation:
To make this easier to explain and easier to solve, we're going to first multiply the second equation of 9x-7y=-15 by -1 to make the y coefficient positive.
This results in -9x+7y=15.
When we line up the two equations on top of each other now, we'll see that both the first and second equations have opposite y coefficients, which is vital for elimination.
The next step is to add the second equation to the first one. Teachers may tell you to subtract, but I find it easier to add if you make the two y coefficients of negative value to each other.
4x-7y=5
+ -9x+7y=15
___________
-5x+0y=20, or just -5x=20, because you have successfully eliminated the y variable.
From there, you're going to solve like a normal equation (divide both sides by -5) toget you x=-4.
