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3 years ago

What is the answer to 3(x-20)=15

Mathematics

2 answers:

Tpy6a [65]3 years ago

8 0

Answer: x=25

explanation: 3(x-20)=15
3x-60=15
+60 +60
3x=75
divide by 3 on both sides
x=25

Vikentia [17]3 years ago

5 0

Answer:25

Step-by-step explanation:15÷3=5 5+20=25

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Tell whether the angles are adjacent or vertical. Then find the value of x.

olga55 [171]

Answer:

x=44, They are adjacent

Step-by-step explanation:

since this is right angle it is 90 degrees. You set the whole thing equal to 90, so 43+x+3=90, add 43 and 3=46. Then you subtract 90-46, you get x=44.

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3 years ago

Find the slope of the line.

Anika [276]

The equation for working out the slope of a linear line is: $\frac{y_2 - y_1}{x_2 - x_1}$ , where x and y are the coordinate pairs.

So just pick two of the purple dots on the graph and fill in the equation.

I'll pick the dot that's (-4, 1) and (4, -7).

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3 years ago

Given that the sec A = 13/5 and A is in QIV, determine exact value for the sin A.

AysviL [449]

Answer:

The exact value of sin A is opp/hyp = -12/13

Step-by-step explanation:

If A is in Quadrant IV then the "opposite side" is negative and the "adjacent side" is positive. Since sec A = hyp / adj = 13 / 5 and since opp^2 + adj^2 must add up to hyp^2, Therefore y = √(hyp^2 - adj^2), or

y = -√(13^2 - 25) = -√144 = 12.

The exact value of sin A is opp/hyp = -12/13

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3 years ago

I'll name you the BRAINIEST if you can answer this.The scale factor for a model is 18 cm

bezimeni [28]

Answer:

32.625 m

Step-by-step explanation:

You have the proportion ...

18 cm : ___ m = 22.4 cm : 40.6 m

This can be rearranged to ...

___ m/(18 cm) = (40.6 m)/(22.4 cm)

Multiplying by 18 cm gives ...

___ m = (40.6 m)·(18/22.4)

___ m = 32.625 m

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3 years ago

The average birth weight of elephants is 200 pounds. Assume that the distribution of birth weights is Normal with a standard dev

zhenek [66]

The birth weight of elephants at the 85th percentile is 262.16 pounds

<h3>What is the standard deviation?</h3>

Standard deviation is defined as the amount of variation or the deviation of the numbers from each other.

Given that:-

The average birth weight of elephants is 200 pounds $\mu$ = 200

The deviation of 60 pounds. $\sigma$ = 60

The birth weight of elephants at the 85th percentile. z = 85%= 1.036

Now from the formula of z-score:-

$z=\dfrac{x-\mu}{\sigma}\\\\\\z=\dfrac{x-200}{60}\\\\\\1.036\times 60=x-200\\\\\\x=\ \ 262.16\ pounds$

Hence the birth weight of elephants at the 85th percentile is 262.16 pounds

To know more about standard deviation follow

brainly.com/question/475676

#SPJ1

5 0

2 years ago