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Elina [12.6K]
3 years ago
7

I need help plzzzzzz

Mathematics
2 answers:
stellarik [79]3 years ago
7 0

Answer:

3.7a/10+3b

Step-by-step explanation:

<h2><em>Hope this helps and have a great day :)</em></h2>

eduard3 years ago
3 0
The answer is 3.7a+3b

Because you combine like terms
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8090 [49]

Answer:

162 hours

Step-by-step explanation:

1 day= 24 hours

24 times 6= 144

144 + 18= 162

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2 years ago
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Solve the equation for principal values of x. Express solutions in degrees.
Hitman42 [59]

Option C:

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Solution:

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\sin x-1-\cos ^{2} x=0

Using the trigonometric identity:\cos ^{2}(x)=1-\sin ^{2}(x)

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\sin x-2+\sin ^{2}x=0

\sin ^{2}x+\sin x-2=0

Let sin x = u

u^2+u-2=0

Factor the quadratic equation.

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u = –2, u = 1

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sin x can't be smaller than –1 for real solutions. So ignore sin x = –2.

sin x = 1

The value of sin is 1 for 90°.

x = 90°.

Option C is the correct answer.

3 0
3 years ago
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The product of -3 and -7 is positive.<br><br><br> True False
dmitriy555 [2]
True!! If you multiply -3 x -7 you get 21!!
3 0
3 years ago
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vladimir1956 [14]

Answer:

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Step-by-step explanation:

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3 years ago
How can we simplify the expression -(1-5n)-7n
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-(1-5n)-7n \\ \\ -1 + 5n - 7n \\ \\ -1 - 2n \\ \\ Answer: \fbox {-1 - 2n}
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3 years ago
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