2 years ago

Can someone please help me :) !!!!

Mathematics

1 answer:

Gwar [14]2 years ago

6 0

Answer:

Step-by-step explanation:

supplementary angles add up to 180

angle cgr and kga are vertical angles so they are equal

that makes the two angles in question add up to 180

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Find mc when quadrilateral ABCD is a parallelogram.

wariber [46]

Answer:

Step-by-step explanation:

The opposite angles in a parallelogram are congruent, thus

∠ C = ∠ A = 57°

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2 years ago

What is the greatest common factor of 62 and 82? Use prime factorization solve.

Kobotan [32]

62=2×31
82=2×41
so the answer is 2

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2 years ago

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tyler can shovel the driveway in 2 hours. dakota can complete the job in 90 minutes. if they work together, how long will it tak

IRINA_888 [86]

It would take 1minute and 10 seconds to complete the job because you have to subtract 2hours (2:00) by 90seconds (0:90)

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3 years ago

The u.s. department of health and human services collected sample data for 772 males between the ages of 18 and 24. that sample

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The 99% confidence interval for the true mean is given by:

$\bar{x}\pm z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

where:

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$z_{\alpha/2}$ is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.

Therefore, the 99% confidence interval is:

$69.7\pm2.58\left( \frac{2.8}{\sqrt{772}} \right)=69.7\pm2.58(0.1008) \\ \\ =69.7-0.26\leq\mu\leq69.7+0.26 \\ \\ =69.44\leq\mu\leq69.96$

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2 years ago

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A scientist planted 120 seeds, and 90 sprouted. What percent of the seeds failed to sprout?

dsp73

Do 120 seeds - 90 that have sprouted.

120-90= 30

30 divide by the total number of planted 120 seeds

30/120= 1/4

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1/4*100

Cross out 4 and 100 , divide by 4 . 4/4= 1

100/4= 25

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Answer: 25%

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2 years ago