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Alekssandra [29.7K]
3 years ago
10

Could someone help me do this using substitution I need to know how to do this for math

Mathematics
2 answers:
klio [65]3 years ago
7 0
X=y-7
x=2-8y
both equal x so
subsitute y-7 for x in other equaton
y-7=2-8y
add 8y
9y-7=2
add 7
9y=9
divide 9
y=1
sub back
x=y-7
x=1-7
x=-6

(x,y)
(-6,1)
mote1985 [20]3 years ago
7 0
Y-7=2-8y
+8y    +8y
___
9y-7=2
    +7  +7
          ____
    9y=8
_______
       9
y=0.88
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A political polling agency predicts candidate A will win an election with 63% of the votes. Their poll has a margin of error of
scoray [572]

Answer:

56% ≤ p ≤ 70%

Step-by-step explanation:

Given the following :

Predicted % of votes to win for candidate A= 63%

Margin of Error in prediction = ±7%

Which inequality represents the predicted possible percent of votes, x, for candidate A?

Let the interval = p

Hence,

|p - prediction| = margin of error

|p - 63%| = ±7%

Hence,

Upper boundary : p = +7% + 63% = 70%

Lower boundary : p = - 7% + 63% = 56%

Hence,

Lower boundary ≤ p ≤ upper boundary

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Read 2 more answers
Select the correct answer.
garri49 [273]

Answer:

A.

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2 years ago
Help can't figure this problem out
Darya [45]
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Jose car rental company charges $2.75 for a pick up plus $1.25 for each mile driven. How much would you pay to travel 25 miles ?
mote1985 [20]

Answer:

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Step-by-step explanation:

The computation of the amount for traveling 25 miles is shown below:

Since it is given that the rental company charges $2.75 plus $1.25 for each mile

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