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puteri [66]
3 years ago
10

When solving a system of equations, Jared found y = x + 10 for one equation and substituted x + 10 for y in the other equation.

Nicole found x = y – 10 for the same equation and substituted y – 10 for x in the other equation. Who is correct? Explain.
Mathematics
2 answers:
DedPeter [7]3 years ago
8 0

Answer:

Both Jared and Nicole are correct. You can solve for either variable and use the equivalent expression to create a one-variable equation. Then you can solve. Jared would have created a one-variable equation that can be used to solve for x, whereas Nicole would have created a one-variable equation that can be used to solve for y

Step-by-step explanation:

This is the sample answer that Ingenuity has offered.

myrzilka [38]3 years ago
5 0
Both are correct they just chose a different variable to solve for first. they will both get correct answers if they do the rest correctly.
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A shop recorded total sales of $2,000 on Monday. On Tuesday, its sales fell by 10%. On Wednesday, sales fell by another 20% comp
IrinaVladis [17]

The net change, in dollars, in total sales was -60

Step-by-step explanation:

A shop recorded total sales of $2,000 on Monday

  • On Tuesday, its sales fell by 10%
  • On Wednesday, sales fell by another 20% compared with Tuesday
  • From Wednesday to Thursday, sales increased by an amount equal to 25% of Monday’s total sales

We need to find the net change in total sales from Monday to Thursday

∵ The total sales in Monday = $2000

∵ The total sales fell by 10% on Tuesday

∵ 2000 × 10% = 2000 × \frac{10}{100} = 200

∴ The total sales fell by $200 on Tuesday

∴ The total sales on Tuesday = 2000 - 200 = 1800

∴ The total sales on Tuesday is $1800

∵ On Wednesday, sales fell by 20% compared with Tuesday

∵ The total sales on Tuesday = $1800

∵ 1800 × 20% = 1800 × \frac{20}{100} = 360

∴ The total sales fell by $360 on Wednesday

∴ The total sales on Wednesday = 1800 - 360 = 1440

∴ The total sales on Wednesday is $1440

∵ The sales increased by an amount equal to 25% of Monday’s

  total sales from Wednesday to Thursday

∵ The total sales on Monday = $2000

∵ 2000 × 25% = 2000 × \frac{25}{100} = 500

∴ The total sales increased by $500 from Wednesday to Thursday

∵ The total sales = $1440 on Wednesday

∴ The total sales from Wednesday to Thursday = 1440 + 500 = 1940

∴ The total sales from Wednesday to Thursday is $1940

∵ The net of change = The total sales on Thursday - the total sales

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∵ The total sales on Monday = $2000

∵ The total sales on Thursday = $1940

∴ The net change = 1940 - 2000 = -60

∴ The net change from Monday to Thursday is - $60

The net change, in dollars, in total sales was -60

Learn more:

You can learn more about net change in brainly.com/question/6871421

#LearnwithBrainly

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