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inna [77]
3 years ago
14

Consider the system of equations:

Mathematics
2 answers:
Bumek [7]3 years ago
8 0
The answer about the 2x- 3y=7
X=y5 maybe
vodka [1.7K]3 years ago
5 0

Answer:

(x, y) = (5, 1)

Step-by-step explanation:

To <em>eliminate</em> x, you can double the second equation and subtract the first.

... 2(x +4y) -(2x -3y) = 2(9) -(7)

...11y = 11 . . . . . simplify

... y = 1 . . . . . . divide by 11

Using the second equation to find x, we have ...

... x + 4·1 = 9

... x = 5 . . . . . subtract 4

_____

<u>Check</u>

2·5 -3·1 = 10 -3 = 7 . . . . agrees with the first equation

(Since we used the second equation to find x, we know it will check.)

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After 3 hours of of driving, Paul had gone 183 miles. What was his average rate of speed? Explain your answer.
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s(av) =  \frac{∆x}{∆t}  \\

s(av) = average \:  \: speed

∆x = covered \:  \: distance

∆t = time \:  \: of \:  \: the \:  \: covered \:  \: distance \\

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s(av) =  \frac{183}{3}  \\

s(av) = 61 \:  \:  \frac{mile}{hour}

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2 years ago
What is the reciprocal of 3 1/5?
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3 years ago
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At a ski resort there are three different chair lifts that will take you to the top of the mountain. There are six ski trails to
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3 * 6 = 18 . . . . . ways up and down.
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Mrs. Inman place the following function on the board:
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-x^2+7x-12=0. (*-1)
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ira [324]

The park charges 1.50 per ride.

1. Louisa bought 15 ride tickets at 1.50 each.

Equation: C = Entry Fee  + 1.50t

t = 15.

c = 30.75

30.75 = Entry Fee + 1.50(15)

30.75 = Entry fee + 22.50

Entry fee = 30.75 - 22.50

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2.  Entry fee was calculated as 8.25 from #1.

Tickets are 1.50 each.

He can spend 22.

22 = 8.25 + 1.50t

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3 years ago
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