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Sergio [31]
3 years ago
9

Robert stands atop a 1,380-foot hill. He climbs down, reaching the bottom of the hill in 30 minutes. What is Robert’s average ra

te of elevation change in feet per minute?
A. +460.
B. +46
C.-46
D. -460
Mathematics
2 answers:
shusha [124]3 years ago
8 0

The answer to this question would be B. +46 because if you divide 1,380 by 30 you get a positive 46.

aniked [119]3 years ago
7 0

This is an equation of elevation change.  Since it takes 30 minutes do go down 1380 feet, or undergo an elevation change of -1380 feet, the answer is -1380/30, or an average elevation change of -46 feet per minute


Hope this helped.

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Explain what their first step would be if they wanted to eliminate the y variable from the equations.
Vinvika [58]

Answer:

  • r1 +4×r3 ⇒ r1
  • r2 -3×r3 ⇒ r2

Step-by-step explanation:

We note that the coefficient of y in equation (iii) is 1, so it is convenient to use that equation to eliminate y from the others.

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<em>To eliminate the y-variable from equation (i), four times equation (iii) can be added to equation (i).</em>

<em>To eliminate the y-variable from equation (ii), three times equation (iii) can be subtracted from equation (i).</em>

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The result of these operations would be ...

  10x +6z = 28\quad\text{(iv)}\\\\-7x-9z=2\quad\text{(v)}

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3 years ago
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Shkiper50 [21]

it has 2 equal sides and 1 unequal side


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8x + 4 = 6x + 6<br> Help Help Help Help Help
Inessa [10]

Answer:

12x

Step-by-step explanation:

6x +6+ 12x 8x +4 +12x

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Xelga [282]

it is going to take 18 miles in 1 hour

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2 years ago
Question 1 (Essay Worth 10 points)
zysi [14]

$394.51 is future value of money after 2 years.

What future value means?

  • A current asset's future value (FV), which is based on an estimated rate of growth, is its value at a later time.
  • Investors and financial planners use the future value to project how much an investment made now will be worth in the future.

The method that results in more money after 2 years is Peggy's investment.

Which method results in more money in 2 years?

The formula for calculating the future value of an investment:

FV = P (1 + r)^nm

FV = Future value

P = Present value

R = interest rate

m = number of compounding

N = number of years

Future value of Larry's investment: $350 x [1 + (0.04/4)]^(4 x 2) = $379

Future value of Peggy's investment: $350 x [1 + (0.06/12)]^(12 x 2) = $394.51

Learn more about future value

brainly.com/question/14860893

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