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mrs_skeptik [129]
3 years ago
7

Need help with question 20

Mathematics
1 answer:
tigry1 [53]3 years ago
5 0
I would start by dividing by all the multipliers of the parentheses.
\frac{PV}{nt} = r_{1} +r_{2}
Then, I would subtract the unwanted variable from the sum.
\frac{PV}{nt} -r_{2} = r_{1}
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Simplify the expression (2x − 9)(x + 6).<br><br> Help?
Leno4ka [110]
<span>( 2x - 9 ) ( x + 6 )

( 2x ) ( x ) + ( 2x ) ( 6 ) + ( - 9 ) ( x ) + ( - 9 ) ( 6 )

2x² + 12x - 9x - 54

2x² + 3x - 54.</span>
6 0
3 years ago
Read 2 more answers
i haven't submitted a single assignment for this class since winter break bc i didn't realize she was assigning things on goform
rosijanka [135]

Answer and Step-by-step explanation:

<u>Trigonometric Function (These only work for right triangles):</u>

SOH-CAH-TOA

S = Sine = sin

C = Cosine = cos

T = Tangent = tan

O = Opposite (side)

H = Hypotenuse (side)

A = Adjacent (side)

SOH = sin(angle) = \frac{opposite}{hypotenuse}

CAH = cos(angle) = \frac{adjacent}{hypotenuse}

TOA = tan(angle) = \frac{opposite}{adjacent}

1. sinQ (Q is the angle) = \frac{14}{50}  = \frac{7}{25} = 0.28

Use Pythagorean Theorem to find side PQ.  14^{2} + PQ^{2}= 50^{2} \\PQ^{2}  = 2304\\PQ = 48

2. cosQ = \frac{48}{50} = \frac{24}{25} = 0.96

3. tanQ = \frac{14}{48}  = \frac{7}{24}  = 0.29

3 0
2 years ago
What would tan(x) equal in this equation?
Artist 52 [7]

Answer:

\tan {}^{ - 1} (0.83)  = 0.6928

7 0
3 years ago
A DVD player is regularly priced at 79.95 and is on sale for 30% off. What is the discount?
evablogger [386]

Answer:

$2.40 or $77.55

Step-by-step explanation:

I don't know if you are asking for how much off or what, so I'm doing both

First, we have to find how much we have to take off or what is 30% of 79.95 so our equation is:

79.95 x 0.03 = 2.40

So 30% of 79.95 is $2.40

To find how much our new price sale is, we have to take that $2.40 off so our equation is:

79.95 - 2.4 = 77.55

So our discount price is $77.55

hope this helps:)

7 0
2 years ago
Harold works at a men's clothing store which marks up its retail clothing by 27%
coldgirl [10]
Wheres the question?
8 0
3 years ago
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