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3 years ago

Please help and explain would I still set this up with law of sine or use cosine

Mathematics

1 answer:

Svetach [21]3 years ago

4 0

You would use the tangent first, because the opposite of 40 would be x and the adjacent would be 30ft

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Factor. x^2+7x-30 <br> Please show me the answer please

jeka57 [31]

Answer:

(x-3) (x+10)

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

consider the point A= (1,2) and the line B, given by the equation y=3x-5. write an equation in slope intercept of the line passi

Gre4nikov [31]

Answer:

y = 3x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 3x - 5 ← is in slope- intercept form

with slope m = 3

Parallel lines have equal slopes, thus

y = 3x + c ← is the partial equation of the parallel line

To find c substitute (1, 2) into the partial equation

2 = 3 + c ⇒ c = 2 - 3 = - 1

y = 3x - 1 ← equation of parallel line

5 0

3 years ago

What is the base (in inches) of a triangle with an area of 161 square inches and a height of 14 inches?

pantera1 [17]

$\textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh ~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ h=14\\ A=161 \end{cases}\implies 161=\cfrac{1}{2}b(14) \\\\\\ 161=7b\implies \cfrac{161}{7}=b\implies 23=b$

7 0

1 year ago

What is the measure of

Nat2105 [25]

Answer:

Step-by-step explanation:

180-156=24

5 0

3 years ago

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A study has indicated that the sample size necessary to estimate the average electricity use by residential customers of a large

Zanzabum

Answer:

$\sigma=547.1125$

Step-by-step explanation:

-The margin of error is calculated using the formula:

$ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\$

-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:

$ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\\\30=1.645\times\frac{\sigma}{\sqrt{900}}\\\\\sigma=\frac{30^2}{1.645}\\\\=547.1125$

Hence, the population standard deviation is 547.1125

7 0

3 years ago