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guajiro [1.7K]
3 years ago
6

A plumber charges a rate of $65 per hour for his time but gives a discount of $7 per hour to senior citizens. Write an expressio

n which represents a senior citizen’s total cost for the plumber in 2 different ways.
Mathematics
1 answer:
garri49 [273]3 years ago
4 0

Answer:

t = 58x or t + 7x = 65x

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Help me with this plase
MakcuM [25]

Answer:

I believe it is A because if you use the slope x it matches with the line.

3 0
2 years ago
During a visit to a primary care physician's office, the probability of having neither lab work nor referral to a specialist is
Verdich [7]

Answer:

Mommy

Step-by-step explanation:

mommy mommy mommy mommy mommy

6 0
2 years ago
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Carrie had $1.00. She spent $0.64 on a present for her teacher. What percent of money did she spend?
tangare [24]
The answer is 64% 64/100 is 64%
4 0
3 years ago
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What is the solution of
kobusy [5.1K]

Answer:

Third option: x=0 and x=16

Step-by-step explanation:

\sqrt{2x+4}-\sqrt{x}=2

Isolating √(2x+4): Addind √x both sides of the equation:

\sqrt{2x+4}-\sqrt{x}+\sqrt{x}=2+\sqrt{x}\\ \sqrt{2x+4}=2+\sqrt{x}

Squaring both sides of the equation:

(\sqrt{2x+4})^{2}=(2+\sqrt{x})^{2}

Simplifying on the left side, and applying on the right side the formula:

(a+b)^{2}=a^{2}+2ab+b^{2}; a=2, b=\sqrt{x}

2x+4=(2)^{2}+2(2)(\sqrt{x})+(\sqrt{x})^{2}\\ 2x+4=4+4\sqrt{x}+x

Isolating the term with √x on the right side of the equation: Subtracting 4 and x from both sides of the equation:

2x+4-4-x=4+4\sqrt{x}+x-4-x\\ x=4\sqrt{x}

Squaring both sides of the equation:

(x)^{2}=(4\sqrt{x})^{2}\\ x^{2}=(4)^{2}(\sqrt{x})^{2}\\ x^{2}=16 x

This is a quadratic equation. Equaling to zero: Subtract 16x from both sides of the equation:

x^{2}-16x=16x-16x\\ x^{2}-16x=0

Factoring: Common factor x:

x (x-16)=0

Two solutions:

1) x=0

2) x-16=0

Solving for x: Adding 16 both sides of the equation:

x-16+16=0+16

x=16

Let's prove the solutions in the orignal equation:

1) x=0:

\sqrt{2x+4}-\sqrt{x}=2\\ \sqrt{2(0)+4}-\sqrt{0}=2\\ \sqrt{0+4}-0=2\\ \sqrt{4}=2\\ 2=2

x=0 is a solution


2) x=16

\sqrt{2x+4}-\sqrt{x}=2\\ \sqrt{2(16)+4}-\sqrt{16}=2\\ \sqrt{32+4}-4=2\\ \sqrt{36}-4=2\\ 6-4=2\\ 2=2

x=16 is a solution


Then the solutions are x=0 and x=16


5 0
3 years ago
THE PERSON WHO PAID $7.99 WAS EITHER THE PERSON WHO HAD THE ICED TEA OR THE PERSON WHO HAD THE WATER
Crazy boy [7]

Answer:

Iced Tea

Step-by-step explanation:

water is not normally 7.99$ so i'm guessing Iced tea depending on the fact that it could be a large or extra large which could get to the total of 7.99$

3 0
3 years ago
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