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nikklg [1K]
3 years ago
13

Jamie ordered 200 business cards and paid 23$. She ordered 500 business cards a few months later and paid 35$. Write and solve a

linear equation to find the cost to order 700 business cards

Mathematics
2 answers:
guajiro [1.7K]3 years ago
8 0
Find the unit rate of the previous two. use that to plug in 700
Marat540 [252]3 years ago
8 0
Jamie ordered 200 business cards and paid 23$. She ordered 500 business cards a few months later and paid 35$. Write and solve a linear equation to find the cost to order 700 business cards

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Y varies directly with x, and y = 5 when x = 4. What is the value of x when y = 8?
Tomtit [17]
As y varies directly with x, there is a proportionality constant. As x increases by that certain constant, y also increases. We equate:
y = kx
where k = proportionality constant.
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5 = k(4)
k = 5/4 or 1.25
When y = 8, then
8 = (5/4)(x)
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3 years ago
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Erica can paint her room 5 hours .If she had her friend Rachel help her , they can paint the room together in 3 hours .How long
LUCKY_DIMON [66]

Answer:

7 hours 30min

Step-by-step explanation:

Step one :

Given data

We are told that Erica can paint 1 room in 5hours

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Hence their combined work rate is 1/3 room per hour

Step two

The combined work expression is

1/A+1/B=1/T

Where A=Erica's work rate

B=Rachael's work rate

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1/B=1/3-1/5

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4 0
3 years ago
Steps for solving rational equations
Murrr4er [49]

Answer:

1. Find the common denominator.

2. Multiply everything by the common denominator.

3. Simplify.

4. Check the answer(s) to make sure there isn't an extraneous solution.

Step-by-step explanation:

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5 0
3 years ago
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FrozenT [24]
The answer is C. 

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\frac{-b +/-  \sqrt{ b^{2} -4ac} }{2a}

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\frac{6 +/- \sqrt{20} }{8}
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