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-BARSIC- [3]
3 years ago
7

Given the function w(x)=2x²+5x, find w(2)

Mathematics
2 answers:
vivado [14]3 years ago
5 0

\text{Put}\ x=2\ \text{to the equation of the function}\ w(x)=2x^2+5x:\\\\w(2)=2(2^2)+5(2)=2(4)+10=8+10=18\\\\Answer:\ \boxed{w(2)=18}

weeeeeb [17]3 years ago
3 0
W(x)=2x^2+5x
w(x)=8+10
W(2)=18
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Marge earned money for helping a local business. She spent 1/2 of the money on her phone, and the remaining 1/2 on a gift. She h
trasher [3.6K]

Answer:

Marge has earned $60.

Step-by-step explanation:

Let the total money she earned be x.

Money spent o the phone = \frac{1}{2}x=0.5x

Money left with Marge after buying phone= x - 0.5 x = 0.5 x

Money spent on the gift= \frac{0.5x}{2}=0.25x

Money left with Marge after buying gift= 0.5 x - 0.25 x = 0.25x

Final amount left with marge = $15

\$15=0.25x

x=\frac{\$15}{0.25}=\$60

Marge has earned $60.

8 0
3 years ago
Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.
Molodets [167]
f(x)= \frac{x-9}{x+5}
g(x)= \frac{-5x-9}{x-1}
f(g(x))= \frac{ \frac{-5x-9}{x-1} -9}{ \frac{-5x-9}{x-1}+5 }
f(g(x))= \frac{-5x-9-9(x-1)}{-5x-9+5(x-1)}
f(g(x))= \frac{-5x-9-9x+9}{-5x-9+5x-5}
f(g(x))= \frac{-14x}{-14}=x
g(f(x))= \frac{-5 \frac{x-9}{x+5}-9 }{ \frac{x-9}{x+5}-1 }
g(f(x))= \frac{-5x+45-9(x+5)}{x-9-1(x+5)}
g(f(x))= \frac{-5x+45-9x-45}{x-9-x-5}
g(f(x))= \frac{-14x}{-14}=x

                          

 

 

 

 

 

 

 

 






6 0
3 years ago
ILL GIVE brainleiest PLZ HELP
weqwewe [10]

Answer:

B

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Justin completes 8 extra credit problems on the first day and then 4 problems each day until the worksheet is complete. There ar
Serhud [2]

Answer:

28-8-4x=0

x=5

5 days

Step-by-step explanation:

28-8=20 problems left

then 4 each day

3 0
3 years ago
To model some data, Anne ran a linear regression and found the regression equation to be y=0.554x-0.507.
k0ka [10]

Answer:

See Explanation

Step-by-step explanation:

Given

y = 0.554x - 0.507

The question is incomplete; however, a possible question could be to interpret the given equation.

The equation is given in slope intercept form i.e. y = mx + b

Where

m = slope

b = y\ intercept

So, by comparing:

y = mx + b to y = 0.554x - 0.507

m = 0.554

b = -0.507

<em>Hence, the slope of the regression is 0.554 and the y intercept of -0.507</em>

6 0
3 years ago
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