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dem82 [27]
3 years ago
9

Find the area of the composite figure. O 48 units 52 units 40 units 44 units

Mathematics
2 answers:
siniylev [52]3 years ago
5 0
48 units should be correct
aalyn [17]3 years ago
5 0

Answer:

when I did it i got 44 units i dont know why

Step-by-step explanation:

I picked the other one but it said it was wrong?

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Sandra needs to buy 21/25 meters of chain for a home project. Which decimal number is equal to the fraction 21/25 ?
lesya692 [45]
<u><em>≡ Solution:</em></u>
<em>⇔ To make it easier:</em>
⇒ ²¹/₂₅ × ⁴/₄
⇒ ⁸⁴/₁₀₀
<u>⇒ 0,84</u>
8 0
3 years ago
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it takes an airplane 1 hour 30 minutes to fly 600 km against the wind. the return trip with the wind takes only 1 hour. find the
DiKsa [7]

The total flying time for the round trip if there was no wind would be 2 hours 24 minutes. The result is obtained by using the elimination method.

<h3>What is elimination method?</h3>

The elimination method is a method for solving system of linear equations where we eliminate one variable so that we can get an equation in one variable. In doing that, we can either add or subtract the equations.

Given the case that an airplane takes 1 hour 30 minutes to fly 600 km against the wind. It takes only 1 hour in the return trip.

What would be the total flying time for the round trip if there was no wind?

Let's say:

  • v = the speed of the airplane
  • w = the speed of the wind

When the airplane leaves,

v - w = 600 km / 1.5 hour

v - w = 400 kph ... (<em>equation 1</em>)

When the airplane returns,

v + w = 600 km / 1 hour

v + w = 600 kph ... (<em>equation 2</em>)

We eliminate the equation 2 and 1 to get the speed of the airplane.

v - w = 400 kph

<u>v + w = 600 kph</u> +

2v = 1000 kph

v = 1000 ÷ 2

v = 500 kph

For the round trip, the airplane would fly 600 × 2 = 1200 km.

The total flying time if there was no wind would be

t = s/v

t = 1200/500

t = 2.4 hour

t = 2 hours 24 minutes

Hence, the  total flying time for the round trip if there was no wind is 2 hours 24 minutes.

Learn more about elimination method here:

brainly.com/question/14619835

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4 0
1 year ago
an investor received $1400 interest per annum from a sum of money, with part of it invested at 10% and the remainder at 7% simpl
Airida [17]

Answer:


Step-by-step explanation:

let x be one part of the money invested.

let y be the other part of the money invested.

x *(10/100) -- amount on 10% of interest per annum

y*(7/100)- amount invested on 7% of interest per annum

x *(10/100) + y*(7/100) =1400

on simplifying it

10x +7y =140000  --(1)

On interchanging the interest rate on x amount and y amount of the investor

x *(7/100) + y*(10/100) =1490

7x +10y =149000-(2)

on solving equation (1) and (2) we get

70x +49y =980000

70x + 100y =1490000

-51y= -510000

y=10000

and x=7000

So our total amount invested is 17000


3 0
3 years ago
What is 0.502 into a fraction
GarryVolchara [31]
To convert a decimal to a fraction, place it over it's place value and then simplify.

502/1000
251/500
5 0
3 years ago
Your office manager has given you a budget off 30000 to replace the old computers in your office with new ones . Each new comput
Lesechka [4]
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$3625
5 0
3 years ago
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