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mars1129 [50]
3 years ago
13

In the diagram, m_1 = (4x + 10)° and mZ2 = (x + 20°. The value of x' is:

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
8 0

Answer:

x=30

(Option 2)

Step-by-step explanation:

Well if the <1+<2=180 then you can put the equation as 4x+10+x+20=180. We can simplify that to be 5x+30=180. Minus 30 from both sides: 5x=150; x=30

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Multiply &amp; Simplify.
kipiarov [429]
<span>2a(7a²-3a+9)
=14a^3 - 6a^2 +18a

answer is </span><span>D. 14a³-6a²+18a</span>
3 0
2 years ago
A circle has an area of 75 square centimeters. Which answer is closest to the measure of its radius?
REY [17]

Answer:

  5 √(3/π) centimeters .

Step-by-step explanation:

I think that's the exact answer

6 0
3 years ago
Read 2 more answers
Solve the following equation to find the value of x:<br> 2(x + 3) =18
lidiya [134]
Distribute the two: 2x + 6 = 18
Subtract the six: 2x = 12
Divide by two: x = 6

That's your answer!
5 0
3 years ago
Please see attachment for the question and answer choices.
Triss [41]

Answer:

  about 81 years

Step-by-step explanation:

A graphing calculator can give you the answer easily.

__

You can solve the problem algebraically by putting in the given number and solving for t.

  30000 = 32000/(1 +12.8e^(-.065t))

  12.8e^(-.065t) = (32000/30000) -1 = 1/15

  e^(-.065t) = 1/(15·12.8) = 1/192 . . . . . divide by 12.8

  -0.065t = ln(1/192) ≈ -5.257 . . . . . .  take the natural log

  t = -5.257/-0.065 ≈ 80.88 . . . . . . . .divide by the coefficient of t

It will take about 81 years for the number of trees to reach 30,000.

3 0
2 years ago
The Kamp family has twins, Rob and Rachel. Both Rob and Rachel graduated from college 2 years ago, and each is now earning $50,0
dybincka [34]

Answer:

z-value of rachel = 1.875

z-value of rob = -2

z-value of Rachel is more than that of rob. Thus rob is earning below average and rachel is earning above average.

Step-by-step explanation:

Let's denote the salary of Rob and Rachel per year by X. So, X = $50,000

We are told that;

For Rachel's industry;

Mean salary;μ1 = $35,000

Standard deviation;σ1 = $8,000

For Rob's industry;

Mean salary;μ2 = $60,000

Standard deviation;σ2 = $5,000

Formula for z - value is;

z = (X - μ)/σ

Thus;

z-value for rob is;

z2 = (X - μ2)/σ2

z2 = (50000 - 60000)/5000

z2 = -2

z-value for rachel is;

z1 = (X - μ1)/σ1

z1 = (50000 - 35000)/8000

z1 = 1.875

z-value of Rachel is more than that of rob. Thus rob is earning below average and rachel is earning above average.

5 0
2 years ago
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