Let e be equal to what she earned last week.
This week she earned 3e so:
e+3e=72
4e=72
e=18
So she earned $18.00 last week.
value of x is and value of y is
Step-by-step explanation:
We need to solve the system of equations by elimination
Solving the systems:
Rearranging equation(1)
Multiply equation(1) with 5 and add with equation 2
So, value of x is
Now finding value of y
Multiply eq(1) with 3 and eq(2) with 5 and add both equations
So, value of y is
Keywords: System of Equations
Learn more about System of Equations at:
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Triangle X: 4/5=0.8
Triangle Y: 6/7.5=0.8
(Select the triangles with legs at a ratio of 0.8)
A: 8/10=0.8
B: 3/3.75=0.8
C: 10/12=0.8333333333
D: 12/15=0.8
A, B, and D
I must add though, the wording of this question is very bad.
Answer:
There is one solution
Step-by-step explanation:
I did the Khan Academy lesson and I got it correct.
Answer:
<h3>y = 56x</h3>
Step-by-step explanation:
Given the amount to keep one adult in a day to be x
Since 7 days = 1 week
Amount it will take to keep one adult for a week will be 7x
one adult = 7x pounds
To get the expression that show how much it costs per week to keep the 8 adults, we will say;
8 adults = y pounds
where y is the required amount
Solving both expressions
one adult = 7x pounds
8 adults = y pounds
Cross multiply
1 * y = 7x * 8
y = 56x
Hence the required expression is y = 56x