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2 years ago

An item is regularly priced at $25. Kaitlin bought it on sale for 20% off the regular price. How much did Kaitlin pay?

Mathematics

2 answers:

horsena [70]2 years ago

8 0

Answer:

$20

Step-by-step explanation:

25 x (20/100) = 5

25 - 5 = 20

RideAnS [48]2 years ago

4 0

25x.20=5
25-5=20
20 is the correct answer

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What is the equation of the midline for the function f (x)?<br><br> f (t) = 3 cos (x) – 2.5

zaharov [31]

Answer:

y = -2.5

Step-by-step explanation:

For such a problem as this, you can replace all sine or cosine functions with their midline value of 0. Then you have ...

f(x) = 0 -2.5

which simplifies to ...

f(x) = -2.5

You can leave the equation like this, or write it as ...

y = -2.5

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Perhaps you can see that the midline is the value of any constant added to a sine or cosine function.

6 0

2 years ago

I need algebra help.....

Lubov Fominskaja [6]

Answer:

$y=4(3)^x$

Step-by-step explanation:

From the table given in the question,

x y Difference Ratio

1 12 - -

2 36 36-12 = 24 $\frac{36}{12}=3$

3 108 108-36 = 72 $\frac{108}{36}=3$

4 324 324-108 = 216 $\frac{324}{108}=3$

5 972 972-324 = 648 $\frac{648}{216}=3$

There is a common ratio of 3 in each successive term.

Therefore, data given in the table will represent an exponential function.

$y=a(b)^x$

For a point $(1, 12),$

$12=a(b)^1$

$ab=12$ ------(1)

For another point of the table $(2,36)$ ,

$36=a(b)^2$

$ab^2=36$ --------(2)

Equation (2) divided by equation (1)

$\frac{ab^2}{ab}=\frac{36}{12}$

$b=3$

From equation (1),

$3a=12$

$a=4$

Therefore, exponential function will be,

$y=4(3)^x$

7 0

2 years ago

Someone plsss help me quick

Marina CMI [18]

Answer:

15b + 30

Step-by-step explanation:

By expansion (6 x 2.5b) + (6 x 5)

= 15b + 30

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3 years ago

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Romashka [77]

Answer:corresponding angles

I am very sure

Step-by-step explanation:

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2 years ago

Help please. I need help with the last one

snow_lady [41]

(-1,4), (1,1), (3,-2)

6 0

3 years ago