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Phantasy [73]
4 years ago
5

100 points, please help? its my last question im stuck on and im almost done! explanations are appreciated too (i wont forget to

give u brainly as well)

Mathematics
2 answers:
lapo4ka [179]4 years ago
7 0
First box’s is angle addition postulate. The the second box is x=15
Tasya [4]4 years ago
5 0

1. Angle addition postulate

2. 2(15)+4(15)+6(15)=180

180=180

x=15


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Answer:

I believe the answer is 7/20 or 35%.

Step-by-step explanation:

I first started by subtracting the coins that we already know from the total, and I get 7. I put that in fraction form which is, 7/20 and I turned it into percent form which is 35%. I hope one of these answers helps.

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(3x-4)/(14)=(9)/(10) Solve the proportion. Round to the tenths
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<em><u>Solution:</u></em>

Given that we have to solve the proportion

\frac{3x - 4}{14} = \frac{9}{10}

We can solve the above given proportion for "x" by cross multiplying

Multiply the numerator of the left-hand fraction by the denominator of the right-hand fraction

Multiply the numerator of the right-hand fraction by the denominator of the left-hand fraction

Set the two products equal to each other

Solve for the variable "x"

\rightarrow \frac{3x - 4}{14} = \frac{9}{10}\\\\\rightarrow 10(3x - 4) = 14 \times 9\\\\\rightarrow 30x - 40 = 126\\\\\rightarrow 30x = 126 + 40\\\\\rightarrow 30x = 166\\\\\rightarrow x = 5.533

On rounding to nearest tenth we get 5.5

Thus value of "x" is 5.5

3 0
4 years ago
What are the x-interceptsf(x)=-2x2-3x+20?​
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Step-by-step explanation:

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it rise over run so put 2y on graph count down 4 and move right 1

Step-by-step explanation:

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