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Vinil7 [7]
2 years ago
5

PLLKEEASE HELPPPPPPP ASAPP

Mathematics
1 answer:
erica [24]2 years ago
7 0

Answer:

x = 19

Step-by-step explanation:

(5x + 4)° + (x - 2)° + (3x + 7)° = 180°

(5x + x + 3x)° + (4 - 2 + 7)° = 180°

9x° + 9° = 180° → ÷9

x + 1 = 20

x = 20 - 1

x = 19

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Given f(x)=3x^3+2x+k and x+1 is a factor of f(x) then what is the value of k
yaroslaw [1]

Answer:

k = 5

Step-by-step explanation:

Given that (x + 1) is a factor of f(x) then f(- 1) = 0

f(- 1) = 3(- 1)³ + 2(- 1) + k

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Then - 5 + k = 0 ( add 5 to both sides )

k = 5

3 0
3 years ago
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gladu [14]

Answer:

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2 years ago
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Step-by-step explanation:

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3 0
3 years ago
Read 2 more answers
The cost price of an article is $40 and the profit is 20 per cent of the cost price.
Doss [256]
32 dollars since
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