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3 years ago

Please help me I need help with this one I will give you the brain thing and extra points

Mathematics

1 answer:

Ipatiy [6.2K]3 years ago

5 0

I’m pretty sure it is Y=3x-7 I hope I can help

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Help i'm in a hurry!!! first gets brainliest!!!!!!!!!!!!!!!!!!!<br> Help on the second one pls!

mina [271]

Answer:

THX FOR AWNSERING

Step-by-step explanation:

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3 years ago

If anyone can answers these i will give them a brainlist.

Levart [38]

Answer:

1. X= 25.9 meters

2.X= 21.3 meters

Step-by-step explanation:

1. Tan 50°= X/21

2. Tan 12°= X/100

4 0

3 years ago

What does d/dx (-8x - 643)=

poizon [28]

See the attachment.....

3 0

3 years ago

A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level

cupoosta [38]

Answer:

The sample required is $n = 135$

Step-by-step explanation:

From the question we are told that

The standard deviation is $\sigma = 9$

The margin of error is $E = 2$

Given that the confidence level is 99% then the level of significance is mathematically evaluated as

$\alpha = 100-99$

$\alpha = 1 \%$

$\alpha = 0.01$

Next we will obtain the critical value $\frac{\alpha }{2}$ from the normal distribution table(reference math dot armstrong dot edu) , the value is

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 2.58$

The sample size is mathematically represented as

$n = [ \frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ]^2$

substituting values

$n = [ \frac{ 2.58 * 9 }{2} ]^2$

$n = 135$

3 0

3 years ago

4. Find the missing angle<br><br> PLS I NEEDDDD HELPPP WILL GIVE BRAINLIEST TO WHOEVER ANSWERS.

Ainat [17]

Answer:

i’m not 100% sure, but i’m going to say it’s 30 degrees

Step-by-step explanation:

because ik that all triangles equal 180 degrees. if this is wrong, i’m so sorry.

3 0

3 years ago