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Zolol [24]
2 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]2 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]2 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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Sara bought a 20 ounces jar of strawberry jam for $4 what is the unit price
snow_tiger [21]

Answer: Unit price = 0.2 per ounce

Step-by-step explanation:

What we were given;

Product price = $4

Quantity of product = 20 ounce

To get the unit price of the strawberry jam,

We simply devide the product price by the quantity of the product

Therefore;

Unit price = 4 / 20

Unit price = 0.2 per ounce

6 0
3 years ago
A. y= -4/5x+ 5/4 <br> B. y= -4/5x+ 3/2<br> C. y= -5/4x+ 3/2<br> D. y= -5/4x+ 5/4
Effectus [21]
The answer is C and here are the steps

7 0
3 years ago
Does this equation make sense plz help.
Gnoma [55]
<h3>✽ - - - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Simply substitute the values into the equations to see if it's correct:

Since the time taken will be more than 2 hours, we can try it with the value 3

t(x) = 70 + 5(3) = 85

g(x) = 30 + 15(3) = 75

As you can see, this is the incorrect choice as when a value more than 2 hours is used, the second engineer has a cheaper cost.

➶ Hope This Helps You!

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8 0
3 years ago
If (a+b) / (x−y) = 3/5 then (10a + 10b) / (9x−9y) = ?
lbvjy [14]

Answer:

2/3

Step-by-step explanation:

Look at what you are getting on the right hand question. 10a +10b has a common factor that can be pulled out. It is 10

10a + 10b = 10(a + b)

Now look at the denominator

9x - 9y = 9(x -y)

There are a lot of possible answers.

Mine would be to multiply 3/5 * 10/9

\dfrac{3}{5}*\dfrac{10}{9} = \dfrac{30}{45} = \dfrac{2}{3}

so

(10a + 10b)/(9x - 9y) = 2/3

5 0
2 years ago
Read 2 more answers
9. what is the measure of QSR
Scilla [17]
<h3>Answer:  C) 142 degrees</h3>

=======================================================

Explanation:

Extend segment MN such that it intersects side ST. Mark the intersection as point A. See the diagram below.

We're given that angle MNT is 72 degrees. The angle TNA is equal to 180-(angle MNT) = 180 - 72 = 108 degrees, since angles MNT and TNA add to 180.

For now, focus entirely on triangle TNA. We see from the diagram that T = 34 and we just found that N = 108. Let's find angle A

A+N+T = 180

A+108+34 = 180

A+142 = 180

A = 180-142

A = 38

So angle NAT is 38 degrees.

----------------------------

Since segment MA is an extension of MN, and because MN || SQ, this means MA is also parallel to SQ.

We found at the conclusion of the last section that angle NAT was 38 degrees. Angles QST and NAT are corresponding angles. They are congruent since MA || SQ. This makes angle QST to also be 38 degrees

----------------------------

The angles QSR and QST are a linear pair, so they are supplementary

(angle QSR) + (angle QST) = 180

angle QSR = 180 - (angle QST)

angle QSR = 180 - 38

angle QSR = 142 degrees

5 0
3 years ago
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