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Lapatulllka [165]
3 years ago
8

7) Which ordered pair is a solution of the equation 3y – 2 = 8x + 5? *

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
3 0
<span>If you plug in the values with their respective x and y variables you can find out.

For (1, 5): 
3y - 2 = 8x + 5
3(5) - 2 = 8(1) + 5
15 - 2 = 8 + 5
13 = 13

This is indeed correct because 13 equals 13.</span>
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The price of gasoline at a service station increased from $1.65 per gallon last week to $1.82 per gallon this week. Sally paid $
Mila [183]

Answer:

  $2.72

Step-by-step explanation:

The increase from last week is the fraction ...

  (new price)/(old price) -1 = (1.82/1.65) -1 = 17/165

so the amount of increase Sally will pay this week is ...

  17/165×$26.40 = $2.72

_____

<em>Comment on the working</em>

We could work this several ways. Perhaps most straightforward would be to determine how many gallons Sally bought last week, and multiply that by the change in price. Or, the number of gallons could be multiplied by the new price per gallon and the difference from the old purchase amount found.

If you look at the numbers, you see that we have effectively done it the first way. The change in price is $0.17 per gallon, and the number of gallons Sally bought is $26.40/$1.65.

8 0
2 years ago
Need help please cant understand this probplem
klasskru [66]

Answer:

No solution

Step-by-step explanation:

Distribute the right side of the equation.

This will make it 3/8f+1/2=3/8f - 18

And, since 3/8f plus 1/2 will never equal the same thing as 3/8f minus 18, there are no solutions

4 0
3 years ago
Read 2 more answers
I kinda need some help as soon as possible I'll give you 20 points
Shtirlitz [24]

Answer:

x= 5

Step-by-step explanation:

20x=100

divide 100 by 20

x=5

8 0
2 years ago
Please give me a real answer or I will report you I dont want to friend you just put the answers in the comments
kotykmax [81]

Answer:

j = 17.32 sq rt 3  or   30

Step-by-step explanation:

sin 60 = j/20sq rt 3

0.8660 = j/20sq rt 3

j = 17.32 sq rt 3

4 0
3 years ago
The equation of the line of best fit of a scatter plot is y = 3x − 8. What is the slope of the equation?
Irina-Kira [14]
Y = 3x − 8. What is the slope of the equation?

C. 3
5 0
3 years ago
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