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Vladimir79 [104]
3 years ago
14

One hot air balloon is 15 meters above the ground, and is rising at a rate of 20 meters per minute. A second balloon is 195 mete

rs above the ground , and is descending at a rate of 16 meters per minute. In how many minutes will the two balloons be at the same height?

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
5 0
The best way to see what is happening in both situations is to create a table showing the new elevation after each minute.

Please see the attached picture for the work.

After five minutes, both balloons will be at the same height.

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The diagonals of a parallelogram are 24 meters and 40 meters and
Naddika [18.5K]

Answer:

  28 m

Step-by-step explanation:

The longer side can be found using the Law of Cosines. The semi-diagonals are of length 12 and 20 m, and the angle between them facing the long side is 180° -60° = 120°.

  c^2 = a^2 +b^2 -2ab·cos(C)

  c^2 = 12^2 +20^2 -2·12·20·cos(120°) = 144 +400 +240 = 784

  c = √784 = 28

The longer side is 28 meters.

8 0
3 years ago
A. 2<br> B. -2<br> C. 1/2<br> D. -1/2
allsm [11]

Rate of change is the slope.

The slope is the change in Y over the change in X:

Slope = (5- -3) / (2 - -2)

Slope = 8/4

Slope = 2

Answer: A.2

7 0
3 years ago
The present value of an ordinary annuity of​ $350 each year for five​ years, assuming an opportunity cost of 4​ percent, is​ ___
liubo4ka [24]
We can calculate it by PVOA table.
PVOA means present value of an ordinary annuity.
PMT = $350
PMT means recurring payment.
time = 5 years and interest rate is 4%
So n = 5 and i = 4%
So we can calculate PVOA as

PVOA = PMT times (PVOA factor for n = 5 and i = 4%)
             = 350 * (4.452) (PVOA factor PVOA table)
             = 1558.2
So present value is $1558.2
4 0
4 years ago
The greater of two numbers is one less than eight times the smaller . Their sum equals 98
Kitty [74]
B>a

b=8a-1

and we are told that 98=a+b so a=98-b, using this value for a in the equation above gives you:

b=8(98-b)-1

b=784-8b-1

b=783-8b

9b=783

b=87, and since a+b=98, a=11

so a and b are 11 and 87
3 0
3 years ago
alex buys a home for $276,400. his home is predicted to increase in value 3.5% each year. What is the predicted value of alex's
Katarina [22]
276400(0.035) = $9674 the equivalent value in dollar for every increase in the house then multiplied by 25. $9674*(25) = $241850 + the current value of Alex's home. $276400+ $241850 = $518250 that would be the value of Alex's home in 25  years. The percentage is (518250-276400)/ 276400 =0.875 *100 = 87.5 % increase in value. I hope this would help.
4 0
3 years ago
Read 2 more answers
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