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Vaselesa [24]
3 years ago
15

Perform the indicated operation7+9+(4)2020O12O-12​

Mathematics
1 answer:
Ivahew [28]3 years ago
7 0
The answer would be 20.

How?

7 + 9 = 16

16 + 4 = 20
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-5x + 7 + 2x - 3<br><br> Simplify
Zielflug [23.3K]

Answer:

−3x+4

Step-by-step explanation:

4 0
3 years ago
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The difference between Sally’s PE mark and Science mark is 12, and the sum of the marks is 154. If the PE mark is the higher mar
Vesna [10]

Answer:

PE = 83 and Science = 71

Step-by-step explanation:

let P represent PE and S represent Science with P > S, then

P + S = 154 → (1)

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Adding the 2 equations term by term eliminates S

2P = 166 ( divide both sides by 2 )

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Vikki [24]
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It doesn't have to be symmetric about the lines y = k or x = h.
6 0
3 years ago
Given the fuction h (x) = x^2 + 2x -3, find the value of h (2) - h (-4)
Anettt [7]

Answer:-

0

Step-by-step explanation:

h(x) = x^2 + 2x -3

x = 2

h(2) = 2^2 + 2(2) - 3

h(2) = 4 + 4 - 3

h(2) = 8-3

h(2) = 5

x = - 4

h(-4) = (-4)^2 + 2(-4) - 3

h(-4) = 16 - 8 - 3

h(-4) = 16 - 11

h(-4) = 5

========

h(2) - h(-4)

5 - 5

0

5 0
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Sveta_85 [38]

Answer:

V=πr^2(h/3)

Step-by-step explanation:

V=π6^2(8/3)

6 0
3 years ago
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