The value of expression is: 9/8
Step-by-step explanation:
In order to evaluate the expression at given value, the given value is put into the expression and the expression is simplified.
Given expression is:
Putting j = 3/4
Hence,
The value of expression is: 9/8
Keywords: Fractions, addition
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Ok here it is:
4x-5y=40
2x+10y=20
I used the second equation and decided to get x
2x+10y=20
Subtract 10y from both sides.
2x=-10y+20
Divide both sides by 2
x=-5y+10
Put that in for x for first equation
4(-5y+10)-5y=40
Distribute the 4
-20y+40 -5y =40
Combine like terms
-25y+40=40
Subtract 40 from both sides
-25y=0
Divide by -25 on both sides
y=0
Substitute the y in for the 2nd equation
2x+10(0)=20
2x=20
Divide both sides by 2
x=10
So x=10 and y=0
Answer:
C = 2d + 15
Step-by-step explanation:
$2 per km, so $40 for 20km.
55-40 is 15 so $15 is a fixed price.
Hence, C = 2d + 15
Answer: i think the equation would be 7n=8.61 and the cost would be 1.23
Step-by-step explanation:
