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stepladder [879]

2 years ago

7

The equation the quantity of x plus 20 over 2 = 3x represents when two tutoring services with different rate plans charge the sa

me fees for a session of x hours. Solve for x.
x = 10
x = 4
x = −14
x = −17

1 answer:

Setler79 [48]2 years ago

5 0

Answer: D

Step-by-step explanation:

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What is the equation of the line that passes through the point (6,−4) and has a slope of -1/6

Luda [366]

Answer:

y + 4 = (-1/6)(x - 6)

Step-by-step explanation:

Apply the point-slope formula here: y - k = m(x - h) becomes

y + 4 = (-1/6)(x - 6)

6 0

4 years ago

Can I please get some help with this :D

Luba_88 [7]

1. Anwser=53.3 (do 40*3 then anwser x 4)
2anwser=120

6 0

3 years ago

How many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

Irina18 [472]

Answer:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

Step-by-step explanation:

Information given

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=1400$ represent the sample standard deviation

n represent the sample size

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =400 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And the critical value would be $z_{\alpha/2}=2.33$ , replacing into formula (b) we got:

$n=(\frac{2.33(1400)}{400})^2 =66.50 \approx 67$

So the answer for this case would be n=67 rounded up

8 0

4 years ago

Solve pls brainliest

Shtirlitz [24]

Answer:

1.8 or 1 4/5 should be the answer!

8 0

3 years ago

Read 2 more answers

Someone please let me know the answer

erastova [34]

Answer:

The answer is 30°

Step-by-step explanation:

$when \: \: \sqrt{3} \sin( \alpha ) - \cos( \alpha ) = 0 \\ \sqrt{3} \sin( \alpha ) = \cos( \alpha ) \\ multiply \: by \: \frac{1}{ \sqrt{3} \cos( \alpha ) } \\ then \\ \frac{ \sin( \alpha ) }{ \cos( \alpha ) } = \frac{1}{ \sqrt{3} } \\ \tan( \alpha ) = \frac{1}{ \sqrt{3} } \\ then \: \alpha = 30$

3 0

3 years ago