Good evening ,
Step-by-step explanation:
p − p×(15/100) = 51
⇔ p(1 - 15/100) = 51
⇔ p×[(100-15)/100] = 51
⇔ p×(85/100) = 51
⇔ 85×p = 100×51
⇔ p = 51×(100÷85) = 5 100÷85 = 60.
:)
Answer:
$58.65
Step-by-step explanation:
change 15% to a decimal than multiply .15 by 51 then add 51.
Answer:
42 Packs
Step-by-step explanation:
630 divided by 15
Answer:
42
Step-by-step explanation:
you divide 630 by 15 i look like this written out
-3x + 3y = -9
-3x + y = 7
Answer:
x = 5
y = 2
Step-by-step explanation:
-3x + 3y = -9
3y = 3x - 9
Equation 1. y = x - 3
-3x + y = 7
Equation 2. y = 3x + 7
So, put number 1 equation to number 2's y :
x - 3 = 3x + 7
x -3x = 7 + 3
-2x = 10
2x = 10
x = 10/2
x = 5
And, put x, which is 5 , to the any equation to figure out the y.
This time, I'll use equation number 1.
y = 5 - 3
y = 2
Answer:10.4
Step-by-step explanation:
Answer:
1045384620173418506891046 number of copies
Step-by-step explanation:
10464929103984753671930600 ×55215278300
Answer:
B. The test contains 10 three-point questions and 14 five-point questions.
Step-by-step explanation:
Let us first find the solution to the system of equations.
x+y= 24
3x+5y= 100
We use substitution method.
x=24-y
Replacing the value of x in the second equation.
3(24-y)+5y=100
Then solve for y.
72-3y+5y=100
2y=100-72
2y=28
y=14
To find x let us replace the value of y in x=24-y
x=24-14
x=10
This means that the test has 14 five-point questions and 10 three point questions.