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azamat
3 years ago
9

Given f(x)=2x+3 find x=9 show your work

Mathematics
1 answer:
Allushta [10]3 years ago
7 0

Answer:

f(9) =21

Step-by-step explanation:

I will assume you want to find f(9) when x=9

Let x=9

f(9) = 2(9) +3

    = 18+3

     =21

f(9) =21

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Find the inverse of f(x)= 0.5x -1
Ghella [55]

Answer:

Y=2x+2

Step-by-step explanation:

Y=0.5x-1

To find inverse, switch and y

x=0.5y-1

0.5y=x+1

Y=2x+2

6 0
3 years ago
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Which is bigger 1.4 or 1.04?​
jok3333 [9.3K]

Answer:

1.4

Step-by-step explanation:

This is because the 4 is in the hundreds place but the 0 is in the hundreds in the second one.

(Decimals are backwards from whole numbers.)

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3 years ago
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poizon [28]
(1) <span>The surface area of the square pyramid = 4 * (area of one face) + area of the base
area of one face = 0.5 * 34.2 * 28.4
area of the base = 34.2 * 34.2
∴ </span>The surface area of the pyramid = 4 * (<span>0.5 * 34.2 * 28.4) + </span><span>34.2 * 34.2

By comparing the last answer with the answer of </span>Vikram, we find that:
He used the wrong expression to represent the area of the base of the pyramid.
=========================================================

(2) The surface area of the rectangular pyramid
= area of two face with the height 36.5 + area of two face with the height 37.8 + area of the base

area of two face with the height 36.5 = 2 * 0.5 * 36.5 * 25.6
area of two face with the height 37.8 = 2 * 0.5 * 37.8 * 16.2
are of the base = 25.6 * 16.2

Total area = (2 * 0.5 * 36.5 * 25.6) + (2 * 0.5 * 37.8 * 16.2) + (25.6 * 16.2)
                = (36.5 * 25.6) + (37.8 * 16.2) + (25.6 * 16.2)
note: 2 *0.5 = 1

By comparing the last answer with the answer of Tracy , we find that:
<span>Tracy’s answer will be correct because she made use of the fact that 2 (1/2) = 1 in her expression.
=========================================================
</span>
(3)
the total surface area of this rectangular pyramid =
= area of two face with the height 52 + area of two face with the height 60 + area of the base

area of two face with the height 52 = 2 * 0.5 * 52 * 78 = 4,056  m²
area of two face with the height 60 = 2 * 0.5 * 60 * 50 = 3,000  m²
are of the base = 78 * 50 = 3900  m²

Total area = 4,056 + 3,000 + 3,900 = 10,956 m²



















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3 years ago
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You have 3.4 gigabytes available on your MP3 player. Each song is about 0.004 gigabyte. How many more songs can you download ont
Leto [7]

Answer:

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Step-by-step explanation:

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