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crimeas [40]
3 years ago
11

What is a solution to the system of equation 3x-4y=22 -9x+4y=38

Mathematics
2 answers:
sergejj [24]3 years ago
7 0

(-10,-13) is the answer

Svetradugi [14.3K]3 years ago
5 0

X=-10 and y=-13

And the reason is that I cancelled the -4y and +4y so if the the sings are different you add if they are the same you subtract here I want to cancel the y so I add in order to cancel them out Which gets rid of it. Now I’m adding 3x to -9x Which equals -6x and when u add 22 and the 38 it equals 60 now you would have

-6x=60

Divide 60 by -6

=-10

So x is -10

To work out y u gonna have to substitute in any equation I chose the first one because it’s positive so

3x-4y=22

3x-10-4y=22

-30-4y=22

Add 30 to both sides.

-4y=52

Divide by -4

Y=-13

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STALIN [3.7K]

Answer:

option A is the correct answer

6 0
3 years ago
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The distance from Rodney's house to the park is 100 meters. If he walks to the park and back to his house, how far will he have
konstantin123 [22]

Answer:

c. 20,000cm

Step-by-step explanation:

from is house to the park is 100m

from the park back to his house is another 100m

100m+100m=200m

1m = 100cm

200m = xcm

cross multiply

xcm = 200×100

xcm= 20,000cm

3 0
3 years ago
Write the unit fraction that is represented?
Ugo [173]
What is the question?

6 0
3 years ago
On the freeway, it is unsafe to drive too slowly or too quickly. The safest driving speeds on the freeway near Allan’s town were
meriva

Answer:

59.0 miles per hour

Step-by-step explanation:

When you have an equation with an absolute value, you must consider two options: one with a positive result and another one with a negative result.

x-55 = 4.2\\x = 4.2 + 55\\x = 59.2\\\\And\\\\x-55 = -4.2\\x=-4.2 + 55\\x = 50.8

In this case you need the maximum safe driving speed which is 59.2 miles per hour

8 0
3 years ago
David received a 20% tip on a bill of $86.40. how much was his tip?
choli [55]

To find the tip of the bill. You will need to find how much of $86.40 is 20%. In this question, they're asking how much is the tip, not how much will the final price be.

When you multiply a percentage you move the decimal point 2 times to the left: 20. → .20

You would multiply $86.40 by .20

When you solve it 86.40 × .20 = 17.28

$17.28 is 20% of $86.40

$17.28 will be the amount he got for his tip.


3 0
3 years ago
Read 2 more answers
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