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Lilit [14]
3 years ago
13

What is x + 2y - x - y + 5 x​

Mathematics
1 answer:
Viefleur [7K]3 years ago
6 0

Answer:

5x+y

Step-by-step explanation:

x + 2y - x - y + 5 x​

we sum the equals terms

5x+y

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5. SHOPPING Two stores are having a sale on T-shirts
valkas [14]

Answer:

x=20% discount

y=$5 discount

Step-by-step explanation:

let

x= % of discount

y= amount of discount

Price of t shirt in store S=20 - 20x

Price of t shirt in store T= 20 -y

Rose spends $63 for three T-shirts from store S and one from Store T

Store S=20-20x

Store T=20-y

3 shirts from store S=3(20-20x)

1 from Store T=20-y

3(20-20x) + (20-y)=63

60 - 60x + 20-y=63

-60x - y= -17 (1)

Manny spends $140 on five T-shirts from store S and four from Store T

5(20-20x)+4(20-y)=140

100-100x+80-4y=140

-100x - 4y= -40 (2)

Solve eq 1 and 2

-60x - y= -17

-100x - 4y= -40

Multiply (1) by -4

-4(-60x-y)= -17*-4

240x+4y=68 (3)

-100x-4y=-40 (2)

Subtract (2) from (3)

140x=28

x=28/140

x= 0.2

substitute the value of x in (1)

-60x - y= -17

-60(0.2)-y=-17

-12-y=-17

-y=-17+12

-y=-5

Divide both sides by -1

-y/-1=-5/-1

y=5

Therefore,

x=0.2=20% discount

y=$5

5 0
3 years ago
A group of friends are going to see the newest action movie. The price of a ticket is $6.25. As a group, they spent $12 on refre
algol [13]

Answer:

3 people went to the movies. Equation: $6.25p+12=30.75

Step-by-step explanation:

To find your answer, subtract $12 immediately because it is one cost and not unknown. Then, divide the difference between $30.75 and $12 ($18.75) by $6.75. The quotient is the number of people went to see the movie. In the equation, solve for p.

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Answer:

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Answer:

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