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sveta [45]
3 years ago
5

Solve by elimination 5x+6y =-2 15x + 4y= 22

Mathematics
2 answers:
Ipatiy [6.2K]3 years ago
8 0

Answer:

(2,-2)

Step-by-step explanation:

sineoko [7]3 years ago
7 0

Answer:

(2, -2)

Step-by-step explanation:

Multiply the first equation by -3,and multiply the second equation by 1.

−3(5x+6y=−2)

1(15x+4y=22)

Becomes:

−15x−18y=6

15x+4y=22

Add these equations to eliminate x:

−14y=28

Then solve−14y=28for y:

−14y=28

−14y

−14

=

28

−14

(Divide both sides by -14)

y=−2

Now that we've found y let's plug it back in to solve for x.

Write down an original equation:

5x+6y=−2

Substitute−2foryin5x+6y=−2:

5x+(6)(−2)=−2

5x−12=−2(Simplify both sides of the equation)

5x−12+12=−2+12(Add 12 to both sides)

5x=10

5x

5

=

10

5

(Divide both sides by 5)

x=2

Answer:

x=2 and y=−2

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i was going to answer but siomeome beat me lol but hdjwStep-by-step explanation:

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What is the solution to the equation below? Round your answer to two
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4 0
3 years ago
The ratio of Chris and Dom's ages is
Paraphin [41]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ 3x + 7 / 4x + 7 = 4/5

Cross multiply:

5(3x + 7) = 4(4x + 7)

Expand:

15x + 35 = 16x + 28

Subtract 28 from both sides:

15x + 7 = 16x

Subtract 15x from both sides:

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Dom is 28 years old

<h3><u>✽</u></h3>

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6 0
3 years ago
Eric's bicycle tires have a 29-inch diameter and Maggie's bicycle tires have a 26-inch diameter. How much farther do Eric's tire
Tema [17]

Answer:

Eric’s tires would have traveled 94.2 inches more

Step-by-step explanation:

To get the answer to this question, we will need to calculate the circumference of each of the tires, then multiply each of the answers by the number of times in which they moved which is 10 in this case.

We start with Eric’s

Mathematically, the circumference of a circle C can be calculated by multiplying the diameter of the circle by pi.

C = pi * D

pi has a value of 22/7

in Eric’s case, the value of the circumference is 3.14 * 29 =91.06 inches

After 10 complete revolutions, the distance traveled by Eric’s tires would be 91.06 * 10 = 910.6 inches

Now, let’s move on to Maggie, the circumference of her own tires would be;

C = pi * D = 3.14 * 26 = 81.64 inches

The distance traveled after 10 revolutions would be 10 * 81.64 = 816.4 inches

Now we want to know how much father Eric’s tires have traveled after these 10 revolutions. That could be calculated by subtracting the value of 10 times the circumference of Maggie’s tires from that of Eric’s.

hence we have 910.6 - 816.4 = 94.2 inches

3 0
3 years ago
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