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dangina [55]
2 years ago
14

John and Ariana bought school supplies. John spent $11.00 on 5 notebooks and 7 pens. Ariana spent $7.00 on 4 notebooks and 2 pen

s. What is the cost of 1 notebook and what is the cost of 1 pen?
Mathematics
1 answer:
emmainna [20.7K]2 years ago
5 0

Step-by-step explanation:

set notebooks as x, set pens as y

1. 5x + 7y = 11

2. 4x + 2y = 7

1.  times by 2

10x + 14y = 22

2. times by 7

28x + 14y = 49

2. minus 1.

18x = 27

x = 1.5

sub 1.5 into 2.

4(1.5) +2y = 7

6+2y = 7

2y = 1

y = 0.5

Therefore, x = 1.5, y = 0.5

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6 painters can paint the fence in 15 hours. How long would it take 5 workers to do the same job?
SOVA2 [1]

Answer:

12.5 hours

Step-by-step explanation:

15/6 is 2.5. 2.5 is how many hours per worker. 5 times 2.5 is 12.5 hours

8 0
3 years ago
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maxonik [38]

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6 0
3 years ago
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You are planning to work in the summer (13 weeks). You
Llana [10]

Answer:

(a) Equations for both

y = 500 + 12x --- lifeguard

y = 15x --- camp counselor

(b) Total pay for 5 days

Lifeguard pays $800

Camp counselor pays $375

(c) Which pays more

Lifeguard job pays more

Step-by-step explanation:

Let

x \to hours

y \to total\ pay

Given

Lifeguard job

Signing\ bonus = \$500

Rate = \$12/hr

Camp counselor job

Signing\ bonus =\$0

Rate = \$15/hr

Solving (a): The equation for both

The total pay for each job is calculated as:

Total Pay = Signing Bonus + Rate * Hours

So, we have:

Lifeguard

y = 500 + 12*x

y = 500 + 12x

Camp counselor

y = 0 + 15 * x

y = 15x

Solving (b): Total pay for 5 days

First, we calculate the total hours worked in 5 days

x = 5hrs/day * 5days

x = 25hrs

So, the pay for each is:

y = 500 + 12x

y =500 + 12*25

y =800 --- Lifeguard

y = 15x

y = 15 * 25

y = 375 --- camp counselor

Solving (c): Which job pays more

By comparing the solution in (b)

800 > 375

<em>Hence, lifeguard job pays more</em>

6 0
3 years ago
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C. (5, -11) hope this helps and I’m like sure sure it’s right
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3 years ago
Multipy the expreshions (2h+2.7) (2h-27)​
Musya8 [376]

Answer:

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Step-by-step explanation:

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5 0
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