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lilavasa [31]
3 years ago
5

Write the equation of the line that has a slope -2 of and contains the point (1,2)

Mathematics
1 answer:
Valentin [98]3 years ago
8 0

Answer:

Step-by-step explanation:

y=mx+C

M= slope

2= -2(1)+ C

2 = -2+C

C = 2+2

C = 4

<h3>Equation: y = -2x + 4</h3>

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Question is below (wasn't sure about the answer)
Paha777 [63]

Answer: Choice A)

H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\

=================================================

Work Shown:

SA = 2(LW + LH + HW)\\\\2(LW + LH + HW) = SA\\\\LW + LH + HW = \frac{SA}{2}\\\\LH + HW = \frac{SA}{2} - LW\\\\H(L + W) = \frac{SA}{2} - LW\\\\H = \frac{\frac{SA}{2} - LW}{(L + W)}\\\\H = \frac{SA}{2(L+W)} - \frac{LW}{L+W}\\\\

This is not the only way to solve for H.

3 0
3 years ago
Consider the following formula
son4ous [18]
The correct answer is option c
5 0
3 years ago
Please help me!!!!! :)
dsp73
To find the volume,we would first need to find the height of square pyramid, by it's base edge and slant height using Pythagoras theorem:

{height }^{2}  = {13}^{2}  -  {10}^{2}  \\ {height }^{2}  = 69 \\ height =   \sqrt{69}

We can then use the pyramid formula to find the volume:
base \:  \times  \: height \:  \times  \frac{1}{3}

In this case,the volume will be:

10×_/69×1/3
=27.68874...
≈27.7 units^3

Hope it helps!
5 0
3 years ago
Do any of you know any written answers to the Probability Unit Test for 7th grade? I need a little help!
andrew-mc [135]

All tests across the world are different even if they're the same subject and stuff. I think it's easier for you to study, so if you have any questions about them please post them on Brainly!

5 0
3 years ago
A random sample of 56 fluorescent light bulbs has a mean life of 645 hours. Assume the population standard deviation is 31 hours
bezimeni [28]

Answer:

Step-by-step explanation:

We want to determine a 95% confidence interval for the population mean.

Number of sample, n = 56

Mean, u = 645 hours

Standard deviation, s = 31 hours

For a confidence level of 95%, the corresponding z value is 1.96.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

It becomes

645 ± 1.96 × 31/√56

= 645 ± 1.96 × 4.142

= 645 ± 8.12

The lower end of the confidence interval is 645 - 8.12 =636.88

The upper end of the confidence interval is 645 + 8.12 =653.12

Therefore, with 95% confidence interval for the population mean life of fluorescent light bulbs is between 636.88 hours and 653.12 hours

3 0
3 years ago
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