Answer:
4,6
Step-by-step explanation:
Good Luck =)
Overall, the goal is to find the value of x and then use this and the given total to find the percentage of x. First, to do this, we must set up our equations based on the given information.
x + y + z = 510
z = (3/2)y
y = 3x
Now, we can begin to solve with substitution. The ultimate goal is to get the first equation to be regarding one variable and them work backwards using that found value.
Substitute the 3rd equation into the second.
z = (3/2)(3x) ----> Simply
z = (9/2)x
Now, when we plug in z and y into the first equation, only x will be present.
x + (3x) + (9/2)x = 510 ---> Combine like terms.
4x + (9/2)x = 510 ---> Get a common denominator.
(8/2)x + (9/2)x = 510
(17/2)x = 510 -----> Multiply both sides by 2/17
Now, if you understand what you are looking at, you know that you just found your answer which is 2/17 because you are about to multiply that by the total.
2/17 = .12 × 100 = 12%
If you did not know that, you can continue solving and then find the answer using part over whole or the total books of school x divided by the total books from all schools. You will get the same answer!
x = (2/17)×510
x = 60
60/510 = .12 × 100 = 12%
I hope this helps!
Answer:
It would be +3
Step-by-step explanation:
When you add -8 plus a positive 3 that would be a negative -3
well first you should work on the rectangle so since that is l x w
You would do 12*18 which would be 216
so now you got the area of the rectangle now since we know the base and height of the triangle you would do 7*18*1/2 which would be 28
so now you add 216 and 28 which would be 244 which would be your answer
hope this helps
P.S the base of the triangle is the width of the rectangle in this problem
