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Ulleksa [173]
3 years ago
7

Which best describes the error in solving the system of linear equations

Mathematics
2 answers:
Vikentia [17]3 years ago
6 0

Answer:

I do not know if this is what you meant

x=2

y=1

Step-by-step explanation:

2x+y=5

3x-2y=4​

multiply by 2

4x+2y=10

3x-2y=4​

add

7x=14

divide

x=2

substitute

2(2)+y=5

3x-2y=4​

solve

y=1

son4ous [18]3 years ago
4 0

Answer:

(2,1)

Step-by-step explanation:

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Xue Ying had 143 more sweets than Joanne.After Joanne gave away 22 sweets, Xue Ying had 6 times as many sweets as Joanne. How ma
andreyandreev [35.5K]

Answer:

In the end Joanne had 55 sweets.

Step-by-step explanation:

Let the number of sweets that Xue Ying had be y and let the number of sweets Joanne had be x.

It is given that Xue Ying had 143 more sweets than Joanne. We can write this information as an equation.

               y = x + 143.

It is also given that Joanne gave away 22 of her sweets and after that Xue Ying had 6 times as many more sweets. We can write this as an equation.

             y = 6(x - 22) = 6x - 132.

Therefore we can equate the two equations and solve for x.

                 x + 143  = 6x  - 132

                5x  = 275

        ∴       x =  \frac{275}{5}  = 55 sweets.

Therefore in the end Joanne had 55 sweets.                        

4 0
3 years ago
GIVING BRAINLIEST Write a proportion that could be used to solve for each variable. Then solve. 16 walls in 40 hours 3 walls in
soldi70 [24.7K]

The proportion that could be used to solve for the variable is \frac{16}{40}=\frac{3}{h} ; h = 7.5 ⇒ answer b

Step-by-step explanation:

A proportional relationship: one variable is always a constant value times the other, that constant is called the constant of proportionality

  • y = k x is the equation of the proportional relationship
  • We can write the proportional relationship in the form \frac{y_{1}}{x_{1}}=\frac{y_{2}}{x_{2}}=k

The number of walls and the number of hours are increased or decreased together

∴ The number of walls and the number of hours are proportion

∵ 16 walls in 40 hours

∵ 3 walls in h hours

- By using the second rule above

∴ \frac{16}{40}=\frac{3}{h}

The proportion that could be used to solve for the variable is  \frac{16}{40}=\frac{3}{h}

Let us solve it to find h

∵  \frac{16}{40}=\frac{3}{h}

- By using cross multiplication

∴ 16 × h = 3 × 40

∴ 16 h = 120

- Divide both sides by 16

∴ h = 7.5

The value of h is 7.5 hours

Learn more:

You can learn more about the proportion in brainly.com/question/10708697

#LearnwithBrainly

4 0
3 years ago
Hhsjshsbsbsbdbdbdbdbshss HELP!! pls​
Ksivusya [100]

Answer:

£425 - £57 = £368

£368/4 = £92

so, Jawad will be paying £92 each month

Step-by-step explanation:

hope this will help

5 0
3 years ago
What two theorems are being used ?
leva [86]

Answer:

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  • Side-Angle-side(SAS)

Step-by-step explanation:

Let's see what is similar in both triangles

  • <A=<F
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So Angle-Angle-Angle similarly theorem verified

  • AB=ED
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So Side-Angle-side or Side-Side-Side similarity theorem verified

3 0
3 years ago
Read 2 more answers
Help me please fast and please explainnnnnn
alexira [117]

Answer:

I'm pretty sure it's 1 cup of water

You need 2 cups of pancake mix more than water so if you have 3 cups of pancake mix then you'd need 1 cup of water.

6 cups of mix = 4 cups of water

the cups of the mix is are 2 more cups than the water

3 cups of mix = 1 cup of water

I hope that helps and good luck! :)

5 0
3 years ago
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