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Ganezh [65]
3 years ago
13

The television repair charge at "We Fix TVs" is $20 per hour plus a $50 flat fee charge. The television repair charge at "Electr

onic Depot" is $40 per
hour with no flat fee. Write a system of equations to model the charges for each repair shop.
Mathematics
1 answer:
spin [16.1K]3 years ago
8 0

Answer:

mine all day

Step-by-step explanation:

speeedruu8un

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How do I solve this question?​
g100num [7]

Answer:

-7  \frac{1}{2}

Step-by-step explanation:

\frac{6 {x}^{ - 1}  {y}^{ \frac{7}{2} } }{ \sqrt{16 {x}^{2} }  {y}^{2} } \\  \\  =   \frac{6 {x}^{ - 1}  {y}^{ \frac{7}{2} } }{ \sqrt{(4 {x} {y})^{2} }}\\  \\  =  \frac{6 {x}^{ - 1}  {y}^{ \frac{7}{2} } }{ {4 {x} {y}}}\\  \\  =   \frac{6}{4}  {x }^{ - 1 - 1}  {y}^{ \frac{7}{2} - 1 }  \\  \\   =   \frac{3}{2}  {x }^{ - 2}  {y}^{ \frac{5}{2} }  \\  \\ equating \: it \: with \:  \\ a {x}^{b}  {y}^{c}  \\  \\  \implies \\ a =  \frac{3}{2}  \\  \\ b =  - 2 \\  \\ c =  \frac{5}{2}  \\  \\ abc =  \frac{3}{2}  \times ( - 2) \times  \frac{5}{2}  \\  \\  =  -  \frac{15}{2}   \\  \\  =- 7 \frac{1}{2}  \\

4 0
3 years ago
Unit 8 Correlation and Regression
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Wait can someone answer this I need help too
7 0
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Modern medical advances might mean people could live 200 years. inâ 2009, the life expectancy is about 80 years. assumeâ that, d
olga2289 [7]
For this problem, we have to set up the formula for the equation first. The equation should help us predict how long would it take to reach a life expectancy of 130 years. Let's start by denoting variable to present them in algebraic equations. Let x be the number of decades, while y is the number of years for life expectancy. The base year used here is 2009 with a life expectancy of 80 years. So, we will expect that 80 is a constant in the expression. We will add to this the number of decades multiplied by 5.4, because it stands for 5.4 additional years per decade. When you write this in an equation, it would be

y = 80 + 5.4x

Now, we substitute y=130.

130 = 80 + 5.4x
x = (130 - 80)/5.4
x = 9.259 

Therefore, it would take approximately more than 9 decades. Projecting this amount of time from 2009, the year would be:

Projected year = 2009 + 9 decades * (10 years/1 decade)
Projected year = 2101

It would be in year 2101.
6 0
3 years ago
What is the slope intercept form for the equation of the line provided?
denis-greek [22]

1. The slope intercept form is:

y=mx+b

Where m is the slope of the line and b is the intercept with the y-axis.

2. To calculate the slope, you can use the following formula:

m=\frac{y_2-y_1}{x_2-x_1}

Where:

y_2=-1\\y_1=\frac{15}{2}\\x_2=\frac{1}{8}\\x_1=-2

3. So:

m=\frac{-1-(\frac{15}{2})}{\frac{1}{8}-(-2)}=-4

4. Now you must find b. Substitute any of the given points into the equation and solve for b:

\frac{15}{2}=-4(-2)+b\\\frac{15}{2}=8+b\\b=-\frac{1}{2}

5. Therefore, the answer is the last option:

y=-4x-\frac{1}{2}

4 0
3 years ago
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