Row D because if you plug in 10 for x you get 17 not 15z
let x = the price of a book
so you would have
total = 3x-20
Answer:
24
Step-by-step explanation:
Rewriting input as fractions if necessary:
1/6, 3/8
For the denominators (6, 8) the least common multiple (LCM) is 24.
LCM(6, 8)
Therefore, the least common denominator (LCD) is 24.
Calculations to rewrite the original inputs as equivalent fractions with the LCD:
1/6 = 1/6 × 4/4 = 4/24
3/8 = 3/8 × 3/3 = 9/24
Answer:
the class has 12 girls and 16 boys what is the ratio of the total students to boys in simplest form
By solving the equations x+2y=5, 4x-12y=-20 through elimination or substitution method we will get the value of x=1 and y=2.
Given two equations x+2y=5 and 4x-12y=-20.
We are required to solve the equations through elimination and substitution method.
Firstly we will solve the equations through elimination method.
x+2y=5-------------1
4x-12y=-20--------2
Multiply the equation 1 by 4 and then subtract the equation 2 from equation 1.
4x+8y-4x+12y=20+20
20y=40
y=2
Use the value of y in 1
x=5-2*2
x=5-4
x=1
From substitution method.
First find the value of x from first equation in terms of y.
x=5-2y-----4
Now put this value in second equation to get the value of y.
4(5-2y)-12y=-20
20-8y-12y=-20
20-20y=-20
-20y=-40
y=2
Put the value of y in equation 4.
x=5-2y
x=5-2*2
x=5-4
x=1
Hence by solving the equations x+2y=5, 4x-12y=-20 through elimination or substitution method we will get the value of x=1 and y=2.
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