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STatiana [176]
3 years ago
11

A department store is having a 15% off sale on all winter coats. You purchase a winter coat for $275. The department store is lo

cated in a county with 7.25% sales tax.
How much money will you save on your coat?
need to know how to solve it?
Mathematics
1 answer:
devlian [24]3 years ago
3 0

Answer:

$16.36??

Step-by-step explanation:

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A glass is 1/3 full. Then 40cm3 of orange juice is poured in.
Sphinxa [80]

Answer:

105 cm³

Step-by-step explanation:
i think lol

3 0
2 years ago
If f (7) = 22, then<br> ff-1(22)) = [?]
lozanna [386]

Answer:

f(f^{-1} (22)) equals 22.

Step-by-step explanation:

For every input in a function, there will be one corresponding output. When taking the output of the function and inserting it as the input to the inverse function of the original, the output will be equivalent to the exact input of the original function. In this case, because f(7)=22, that means f^{-1} (22) will equal 7. Using this knowledge, you can find the value of f(f^{-1} (22)), which will be f(f^{-1} (22)) = f(7)=22, so f(f^{-1} (22)) equals 22.

8 0
3 years ago
What is a solution for both equations y=x+3 and -2x+y=1
Soloha48 [4]

Answer:

(2, 5)

Step-by-step explanation:

Given the 2 equations

y = x + 3 → (1)

- 2x + y = 1 → (2)

Substitute y = x + 3 into (2)

- 2x + x + 3 = 1

- x + 3 = 1 ( subtract 3 from both sides )

- x = - 2 ( multiply both sides by - 1 )

x = 2

Substitute x = 2 into (1) for corresponding value of y

y = 2 + 3 = 5

Solution is (2, 5)

6 0
3 years ago
Read 2 more answers
A local school board member randomly sampled private and public high school teachers in his district to compare the proportions
levacccp [35]

Answer:

0.025 ;

(-0.7198 ; 0.7698)

Step-by-step explanation:

From the table :

_____________ private schls ___ public schls

Sample size, n _____ 80 __________ 520

P, NBC teachers ___ 0.175 ________ 0.150

P1 = P of  private school teachers

P2 = P of public school teachers

Difference in proportion :

P1 - P12 = 0.175 - 0.150.= 0.025

The 90% confidence interval for 2 - sample proportion :

C.I = (p1-p2) ± [Zcritical * √(p1(1-p1)/n1 + (p2(1-p2)/n2)]

Zcritical at 90% = 1.645

C.I = 0.025 ± [1.645 * √((0.175*0.825)/80 + (0.150*0.850)/520)]

C.I = 0.025 ± [1.645 * √(0.0018046875 + 0.0002451)]

C.I = 0.025 ± 1.645 * 0.0452755

C.I = 0.025 ± 0.07448

C.I = (-0.7198 ; 0.7698)

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3 years ago
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