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Maru [420]
3 years ago
5

Find the solution of the system of equations.6x + 8y = -8x + 4y = 4( , )​

Mathematics
1 answer:
ladessa [460]3 years ago
8 0

Answer:

the solution is (-4, 2)

Step-by-step explanation:

6x + 8y = -8

x + 4y = 4

... can be solved using elimination by addition and subtraction, among other methods.  Multiply the second equation by -2 to obtain

6x + 8y = -8

-2x - 8y = -8

Combining these results in

4x = -16.  Thus, x = -4.

Substituting -4 for x in x + 4y = 4 results in

-4 + 4y = 4, or 4y = 8, or y = 2

Then the solution is (-4, 2)

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Cali soccer practice was one hour and 15 minutes long it ended at 7:15 PM what time did practice start
madreJ [45]

Answer:

Soccer practice started at 6:00, because 7:15 - 1:15 = 6:00

5 0
3 years ago
​​​​​​Jocelyn gave the cashier $50 to pay for 3 shirts. The cashier gave her $5.03 in change. Each shirt cost the same amount. W
Goryan [66]

Answer:

14.9

Step-by-step explanation:

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8 0
2 years ago
Express 0.484848..... in p/q form​
cupoosta [38]
<h3>Answer:  16/33</h3>

It's in p/q form where p = 16 and q = 33.

=======================================================

Work Shown:

x = 0.484848.....

100x = 48.4848.....

I multiplied both sides by 100 to move the decimal over 2 spots. Both decimal values for x and 100x have an infinite string of "48"s repeated after the decimal point. When we subtract, those infinite strings will cancel out

100x - x = 99x

48.4848..... - 0.484848..... = 48

So after subtracting straight down, we have the new equation 99x = 48 which solves to x = 48/99

Divide both parts by the GCF 3 to fully reduce

48/3 = 16

99/3 = 33

Therefore, x = 48/99 = 16/33 = 0.484848...

I recommend using a calculator to confirm that 16/33 = 0.484848...

Side note: your calculator may round the last digit, but this is of course rounding error

7 0
3 years ago
In the triangle below, what is the cosine of 45?
Colt1911 [192]
Cosine = adjacent / hypotenuse
cosine = 1 / square root (2)

7 0
3 years ago
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What is the common difference of the sequence 20, 17, 14, 11, 8.... ?
Vinvika [58]

Answer:

-3

Step-by-step explanation:

every sequence goes down by -3

8 0
4 years ago
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