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Delvig [45]
2 years ago
15

Harry earns $45 a week more than Xena. George earns $18 a week less than Xena. If Harry earns the same amount in two weeks that

George earns in three weeks, how much money does Xena earn a week?
This is Multi step equations and has to have a formula btw. Thanks. Help!!

Mathematics
1 answer:
saw5 [17]2 years ago
8 0

Answer:

Xena earns $144 a week

Step-by-step explanation:

Let,

Xena earns a week = X

Harry earns a week = (X + 45)

George earns a week = (X - 18)

According to the question,

2(X + 45) = 3(X - 18)

or, 2X + 90 = 3X - 54

or, 2X - 3X = -90 - 54

or, -X = - 144

or, X = 144 (Multiplying by -1 in both sides)

Therefore, Xena earns $144 a week.

Harry earns = $(144+45) = $189 and George earns $(144-18) = $126.

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Romashka [77]

Answer:

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8 0
3 years ago
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For a certain model of car the distance d required to stop the vehicle if it is traveling at v mi/h is given by the formula d =
enyata [817]
Given that <span>For a certain model of car the distance d required to stop the vehicle if it is traveling at v mi/h is given by the formula d=v+\frac{v^2}{20}, where [tex]d is measured in feet.

If Kerry wants her stopping distance not to exceed 75 ft, then the range of speeds (in mi/h) can she travel is obtained as follows:

v+ \frac{v^2}{20} \leq75 \\  \\ 20v+v^2\leq1,500 \\  \\ v^2+20v+100\leq1,500+100 \\  \\ (v+10)^2\leq1,600 \\  \\ |v+10|\leq\sqrt{1,600} \\  \\ -40\leq v+10\leq40 \\  \\ -40-10\leqv\leq v\leq40-10 \\  \\ -50\leq v\leq30

Therefore, the range of speed she can travel is v\leq30\ mi/hr
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8 0
2 years ago
You buy books for 64 cents each, you plan to sell them for 75 cents each. You're left with 100 unsold books, and you lost $12. H
PSYCHO15rus [73]

The number of books sold is 473.

<u>Step-by-step explanation:</u>

  • The original cost of each book = $0.64
  • The selling price of each book = $0.75

The difference between the original price and selling price of the book gives the profit per book.

The profit of one book = Selling price - Original price

Let,

  • The total number of books be 'x'.
  • The number of books sold be 'y'.
  • The unsold books is 100.
  • The total profit is -12 because it was gone to a loss of $12.

Therefore, the equation is formed as

total Profit = 0.75y - 0.64x

⇒ 0.75y - 0.64x = -12 --------(1)

Total books = sold books + unsold books

x = y + 100

⇒ x-y = 100  -------(2)

Substitute x= 100+y in the eq(1),

0.75y - 0.64(100+y) = -12

0.75y - 64 -0.64y = -12

0.11y = -12 +64

y = 52 / 0.11

y = 472.7

y ≅ 473

The number of book sold is 473 books.

The total number of books is (100+473) = 573 books.

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3 years ago
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3 years ago
Estimate the solution to the system of equations. You can use the interactive graph below to find the solution.
Murrr4er [49]

Answer: x= 3/2 and y= 1/2

Step-by-step explanation:

Since both equations are equated to y, you just need to use substitution to create the equation below:

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Solve the equation for x:

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Plug in x into any one of the given equations to find the value of y:

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y= - (3/2)+2

y= - (3/2)+4/2

y= 1/2

Hope this helps!

4 0
3 years ago
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