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hoa [83]
3 years ago
11

Darnell's car used 8 gallons of gasoline to travel 340 miles. after a mechanic worked on the car, it used 7 gallons of gasoline

to travel 350 miles. If the price of the gasoline was approximately $4.00 per gallon, how much lest to the nearst cent per mile, did it cost to run the car after the mechanic worked on it?
Mathematics
1 answer:
ollegr [7]3 years ago
7 0
Before the mechanic worked on it, it cost .09 (cents) per mile.  After the mechanic worked on it, it cost .08 (cents) per mile.  Divide the number of gallons by the miles in each case and multiply the result by 4.
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28 squared minus 39x minus 80 equals 0​
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Answer:

x = 704/39 ( <----Fraction)

Step-by-step explanation:

28 squared minus 39x minus 80 equals 0​  

784-39x-80=0  evaluate the power

704-39x=0  Subtract the numbers

-39x=-704  move the constant to the right hand side and change it's sign

Divide on both side to get x = 704/39

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3 years ago
Please help and please show work!!!
mina [271]

9514 1404 393

Answer:

  a.  61

Step-by-step explanation:

The remainder theorem tells you the remainder of f(x)/(x -3) is equal to f(3). Using x=3 in the expression, we have ...

  4x³ -2x² -10x +1

  = ((4x -2)x -10)x +1

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The remainder from division by (x -3) is 61.

3 0
2 years ago
Given the system of equation 7x-3y = 48 .......Eq 1 2x+ y = 35 ........Eq 2 __________ To solve this system by elimination and m
lesya692 [45]

Answer:

x = 11.75

y = 11.5

Step-by-step explanation:

By Elimination Method:

   7x - 3y = 48    ---- (1)

-

<u>    2x + y = 35   ----</u>-   (2)

Multiply equation (1) by 2 and equation (2) by 7

   14x - 6y = 96

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<u>    14x + 7y = 245      </u>

<u>      0   -13y = -149</u>

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y = -149/-13

y = 11.5

From equation (2); replace y with 12

2x + y = 35

2x + 11.5 = 35

2x = 35 - 11.5

2x = 23.5

x = 11.75

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3 years ago
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LenaWriter [7]

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Step-by-step explanation:

8 0
2 years ago
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