3 years ago

Solve the equation by completing the square. X^2 + 4x =45

Mathematics

1 answer:

Nina [5.8K]3 years ago

4 0

Answer:

The answer is x=5, −9

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A used-droid dealership buys a droid for $2900 and then sells it for $4300. What is the percent increase?

Anna71 [15]

The percent increase is 48.28

Step-by-step explanation:

Given,

Purchase price of used-droid = $2900

Selling price of used=droid = $4300

Profit = Selling price - purchase price

Profit = 4300-2900 = $1400

Percent increase = $\frac{Profit}{Purchase\ price}*100$

$Percent\ increase=\frac{1400}{2900}*100\\\\Percent\ increase=\frac{140000}{2900}\\\\Percent\ increase=48.275\%$

Rounding off to nearest hundredth;

Percent increase = 48.28%

The percent increase is 48.28

Keywords: percentage, subtraction

Learn more about percentages at:

#LearnwithBrainly

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3 years ago

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Ostrovityanka [42]

Hope this can help you

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3 years ago

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sharon earns $25 per item that she sells plus a base salary of $150 per week. write and solve an inequality to find how many ite

lozanna [386]

She has to sell 24 items

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3 years ago

Which of the following is the value of 3x’ – x+2 when x=-4

Aleks [24]

Answer:

-6

Step-by-step explanation:

3x-x+2

2x+2

2(-4)+2

-8+2

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3 years ago

A recipe for macaroni and cheese calls for 1 cup of shredded cheese

malfutka [58]

Answer:

1 cup

Step-by-step explanation:

for each cup of cheese you need one cup of milk so for every cup of milk you need one cup of cheese :))

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3 years ago