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Jlenok [28]
3 years ago
11

Shawn found that a solution of x = 3 was extraneous for his function. What would be a possible denominator in Shawn's function?

Mathematics
2 answers:
Alex_Xolod [135]3 years ago
6 0

Your answer is B. x2 -2x -3

Hope this helps!!

laiz [17]3 years ago
3 0

Answer:

Option B is correct

Step-by-step explanation:

Given: A solution x =3 was extraneous for his function.

Extraneous solution defined as a root of a transformed equation that is not a root of the original equation because it was excluded from the domain of the original equation.

The only function from the given options

f(x) = x^2-2x-3 has the solution x =3

therefore,

3 is excluded from the domain of the \frac{x^2-2x-3}{x-3}  because it would make the denominator of one of the fractions zero and division by zero is not allowed.

Therefore, it cannot be a root of the equation \frac{x^2-2x-3}{x-3}



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Ann cleans an apartment in 12 hours and liz cleans an apportment in 18 hours. How long would it take to clean an appartment toge
Tresset [83]
If Ann cleans in 12 hours then she cleans \frac{1}{12} of the apartment per hour. Similarly Liz cleans \frac{1}{18} of the appartment per hour. So together then can clean \frac{1}{12}+\frac{1}{18}=\frac{5}{36} of the apartment for hour. Therefor it will take them \frac{36}{5}=7.2 hours to clean.

The general formula R_{c}=\frac{AB}{A+B} can be used as a check if needed.
5 0
3 years ago
Caroline won $205000 in a lottery. After paying $96000 in taxes, she placed the remaining amount in a savings account at a 2% in
natka813 [3]

Answer: $1090

Step-by-step explanation:

Since Caroline won $205000 in a lottery and then paid $96000 in taxes, the remaining amount will be:

= $205000 - $96000

= $109000

The interest that the account will earn after just 6 months will be:

Interest = PRT

= 109000 × 2% × 6/12

= 109000 × 0.02 × 0.5

= $1090

6 0
3 years ago
Which expressions show the expanded form for 50.029?
Anna [14]
They all show 50.029
The correct answers are:
A.) <span>5 × 10 + 0 × 1 + 0 × 1/10 + 2 ×1/100 + 9 × 1/1000 
Sorry.
This is all I can find correct
Its a little hard when you post the tenths, hundredths, and thousandths as fractions, but A is all I can find.

</span>
8 0
3 years ago
A car traveling 100 miles in 2 hours has a unit rate of ___ miles per hour.
Angelina_Jolie [31]

Answer:

50 miles

Step-by-step explanation:

if a car travels 100 miles in two hours, divide 100 by 2 and you get 50 miles.

5 0
3 years ago
Read 2 more answers
18. What is the y-intercept of the line that passes<br> through the points (1, 1) and (5, 13)?
TEA [102]

Answer:

-2

(The coordinate point is (0,-2))

Step-by-step explanation:

First, make an equation of the line.

Start off with finding the slope:

Slope = (13-1)/(5-1) = 12/4 = 3

Then solve for the y-intercept though substitution and simplification:

y=mx+b --> 1=3(1)+b --> 1=3+b --> b= -2

So the answer is -2.

4 0
3 years ago
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