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Ludmilka [50]
4 years ago
11

FOR A TEST, PLEASE HELP Two angles are supplementary if their sum is​ 180°. The larger angle measures three degrees more than tw

ice the measure of a smaller angle. If x represents the measure of the smaller angle and these two angles are​ supplementary, find the measure of each angle. The smaller angle measures ? degrees. The larger angle measures ? degrees.
Mathematics
1 answer:
vodka [1.7K]4 years ago
5 0

Step-by-step explanation:

I think writing the given out helps a bit.

x = small angle

2x+3 = large angle <-- it's 2x since it's twice the small angle and +3 because it's 3 degrees more than the small angle.

small angle + large angle = 180

Now just substitute!

x+(2x+3)=180\\3x=177\\x=\frac{177}{3} \\x=59

Now that you know what x equals (aka the smaller angle) now you can find the larger angle.

2(59)+3\\118+3\\121

Answer:

The <u>smaller angle</u> equals 59°

The <u>larger angle</u> equals 121°

Good luck!

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Answer: (13.22\%,\ 19.34\%)

Step-by-step explanation:

Given : Sample space : n= 559

Sample proportion : \hat{p}=\dfrac{91}{559}=0.162790697674\approx0.1628

=16.28\%

Significance level : \alpha= 1-0.95=0.05

Critical value : z_{\alpha/2}=1.96

Confidence level for population proportion:-

\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.1628\pm (1.96)\sqrt{\dfrac{0.1628(1-0.1628)}{559}}\\\\=0.1628\pm0.030604971367\\\\\approx 0.1628\pm0.0306=(0.1322,\ 0.1934)=(13.22\%,\ 19.34\%)

Hence, 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.= (13.22\%,\ 19.34\%)

7 0
4 years ago
What is -9.2(8x-4)+0.7(2+6.3x) simplified?
umka2103 [35]

Answer:

B

Step-by-step explanation:

- 9.2(8x - 4) + 0.7(2 + 6.3x) ← distribute parenthesis

= - 73.6x + 36.8 + 1.4 + 4.41x ← collect like terms

= -73.6x + 4.41x + 36.8 + 1.4

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4 0
2 years ago
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Answer:

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r = 8.2mm

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