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Zolol [24]
3 years ago
12

A school bought several pairs of skis, each costing $40 and several pairs of skates, each costing $50. The cost of the whole pur

chase was $600. How many pairs of skates were purchased if there were 3 more pairs of skates than pairs of skis?
Mathematics
2 answers:
EleoNora [17]3 years ago
4 0
5 skis and 8 skates
y=ski
x=skates
x=y+3
40y+50x=600
40y+50(y+3)=600
y=5
x=8

makvit [3.9K]3 years ago
4 0
Let the number of pair of skis and skates bought be x and y respectively. So that,
40x+50y = 600

There are 3 more pairs of skates. Therefore,
y-3 = x=> y=x+3
Substituting,

40x+50(x+3) =600 => 40x+50x+150=600 => 90x=600-150 = 450
x= 450/90 = 5 pairs of skis
y= x+3 =5+3 = 8 pairs of skates
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Each T-shirt that just tease produces cross $1.50 to me they sell their T-shirts for $15 at events what is the markup on the T-s
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Answer: The markup on the T-shirts is $ 13.50.

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  • Markup is the difference between the selling price of a product and cost price.

Given : The cost price of each t-shirt = $1.50

The selling price of each t-shirt = $15

Then ,the markup on the T-shirts =  (Selling price of each t-shirt) -( Cost price of each t-shirt)

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4 0
3 years ago
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Joseph and Dwayne are both selling cookie dough for a fundraiser. Although Joseph has already sold 3 tubs, Dwayne hasn't sold an
ArbitrLikvidat [17]

Answer:The number of days it will take to sell the same amount of cookies is 3 and the number of tubs that will be sold is 27

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Let x represent the number of days it will take either of them to sell the same number of tubs.

Let y represent the total number of tubs that that Joseph will sell in x days.

Let z represent the total number of tubs that that Dwayne will sell in x days.

Joseph has already sold 3 tubs. If Joseph starts selling 8 tubs per day, it means that in x days, the number of tubs that he will sell will be

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Dwayne hasn't sold any yet. If Dwayne begins selling 9 tubs per day, it means that in x days, the number of tubs that he will sell will be

z = 9x

To determine the number of days it will take to sell the same amount of cookies, we will equate y to z. It becomes

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3 0
3 years ago
Which two values of x are roots of the polynomial below?
Julli [10]

Answer:

B. and C.

Step-by-step explanation:

1. Set the polynomial equal to zero:

x² + 5x + 7 = 0

2. Plug the given values of a, b, and c into the quadratic formula:

x=\frac{-5+-\sqrt{5^{2}-4(1)(7) } }{2(1)}

3. Solve the square root:

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