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2 years ago

15

How do i start this problem off?

2 answers:

Allushta [10]2 years ago

8 0

The answer is x=29 first you write 2x+6=64
-6. -6
-----------------
2x=58
---- ----
2. 2
U subtract six from both sides than divide by two hope it helped

Zinaida [17]2 years ago

3 0

First recognize that you have complementary angles which means the angles will add up to 90 degrees

that means 64+2x+6 =90

solve for x

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Can u guys please help me!!

Alona [7]

Answer and Step-by-step explanation:

This problem requires the use of trigonometric functions, specifically the tangent trig function.

$tan(Angle)=\frac{opposite}{adjacent}$

Plug in the values.

$tan(40) = \frac{8000}{x}$

Multiply by x to both sides, then divide by tan(40) to both sides.

$x = \frac{8000}{tan(40)}$

Now, plug this into a calculator and rounded to the nearest whole number (foot).

x = 9534.0287

x = 9534 ft.

The answer is 9534 ft., the last option.

#teamtrees #WAP (Water And Plant)

5 0

2 years ago

What is the measurement of N?<br> A) 45° <br> B) 90° <br> C) 100° <br> D) 180°

puteri [66]

N would equal 45° since the tiny square means its 90°. 90-45=45.

5 0

2 years ago

Read 2 more answers

A simple random sample of items resulted in a sample mean of . The population standard deviation is . a. Compute the confidence

Varvara68 [4.7K]

Answer:

(a): The 95% confidence interval is (46.4, 53.6)

(b): The 95% confidence interval is (47.9, 52.1)

(c): Larger sample gives a smaller margin of error.

Step-by-step explanation:

Given

$n = 30$ -- sample size

$\bar x = 50$ -- sample mean

$\sigma = 10$ --- sample standard deviation

Solving (a): The confidence interval of the population mean

Calculate the standard error

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{10}{\sqrt {30}}$

$\sigma_x = \frac{10}{5.478}$

$\sigma_x = 1.825$

The 95% confidence interval for the z value is:

$z = 1.960$

Calculate margin of error (E)

$E = z * \sigma_x$

$E = 1.960 * 1.825$

$E = 3.577$

The confidence bound is:

$Lower = \bar x - E$

$Lower = 50 - 3.577$

$Lower = 46.423$

$Lower = 46.4$ --- approximated

$Upper = \bar x + E$

$Upper = 50 + 3.577$

$Upper = 53.577$

$Upper = 53.6$ --- approximated

<em>So, the 95% confidence interval is (46.4, 53.6)</em>

Solving (b): The confidence interval of the population mean if mean = 90

First, calculate the standard error of the mean

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{10}{\sqrt {90}}$

$\sigma_x = \frac{10}{9.49}$

$\sigma_x = 1.054$

The 95% confidence interval for the z value is:

$z = 1.960$

Calculate margin of error (E)

$E = z * \sigma_x$

$E = 1.960 * 1.054$

$E = 2.06584$

The confidence bound is:

$Lower = \bar x - E$

$Lower = 50 - 2.06584$

$Lower = 47.93416$

$Lower = 47.9$ --- approximated

$Upper = \bar x + E$

$Upper = 50 + 2.06584$

$Upper = 52.06584$

$Upper = 52.1$ --- approximated

<em>So, the 95% confidence interval is (47.9, 52.1)</em>

Solving (c): Effect of larger sample size on margin of error

In (a), we have:

$n = 30$ $E = 3.577$

In (b), we have:

$n = 90$ $E = 2.06584$

<em>Notice that the margin of error decreases when the sample size increases.</em>

4 0

2 years ago

-4(x + 2.1) + 3x = 8.4 what is x

aleksandr82 [10.1K]

Answer:

x= −16.8

Step-by-step explanation:

5 0

2 years ago

Three friends each have some ribbon Carol has 42 inches of ribbon title has 2.5 feet of ribbon and Baxter has 1.5 yards of ribbo

jolli1 [7]

Title has 2.5 feet, 30inches,0.33 yards
Bax has 1.5yards,54inches,4.5feet
and carol has 42 inches 1.1667 yr and 3.5 feet of ribbonthere total is 126 inches 3.50 yards and 10.5 feet of ribbon

5 0

2 years ago