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amm1812
3 years ago
6

7x + 18 and 10x + 9 I need some help quick

Mathematics
1 answer:
Ivahew [28]3 years ago
4 0

Answer:

X=3

Step-by-step explanation:

Equation 1:

7×3=21

21+18=39

Equation 2:

10×3=30

30+9=39

If you replace x with 3 on both equations then you get 39 and if you get 39 on both equations that means it is equal.

<em><u>Could I please have BRAINLIEST?</u></em>

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ira [324]

Answer:

Get some sleep...

Step-by-step explanation:

6 0
3 years ago
Given the line below.
viktelen [127]
<h2>y2-y1/x2-x1 </h2><h3>this is the formula </h3>
6 0
3 years ago
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Sophia has three stickers for every two stickers that Ethan has.
____ [38]

Answer:

40

Step-by-step explanation:

Let number of stickers Sophia has be "x" and number of stickers Ethan has be "y"

Now,

Sophia has 3 for every 2 ethan has, that means

3x = 2y

When sophia gives 16, she will have:

3x - 16

Ethan, after getting 16, will have:

2y + 16

This trade will make Ethan to have TWICE, so we can write:

2(3x-16) = 2y + 16

Now, the 1st equation can be written as:

3x = 2y

x = 2y/3

Now replacing this into 2nd, we solve for y:

2(3x-16) = 2y + 16\\6x-32=2y+16\\6(\frac{2y}{3})-32=2y+16\\4y-32=2y+16\\2y=48\\y=24

So, x is:

x=\frac{2y}{3}\\x=\frac{2*24}{3}\\x=16

<u>Ethan and Sophia has:</u>

<u>24 + 16 = 40 stickers altogether</u>

5 0
3 years ago
Read 2 more answers
Luca has a box of dog toys. There are 3 bones, 5 balls, and a stuffed animal. What is the ratio of balls to stuffed animals?
Zina [86]
5:1 is your answer, 
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8 0
4 years ago
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The three sides of a triangle are n, 3n−1, and 2n+1. If the perimeter of the triangle is 42 inches, what is the length of each s
Svetllana [295]

Answer:

Step-by-step explanation:

n + 3n - 1 + 2n + 1 = 42

6n = 42

n = 7

s1 = 7 inch

s2 = 20 inch  = 3(7) - 1

s3 = 15inch  = 2(7) + 1

5 0
3 years ago
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