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Bogdan [553]
2 years ago
11

Currently, Nora is 3 times as old as Damon. In 8 years, she will only be 2 times as old as Damon. How old will Damon be in 8 yea

rs? A. 8 years old B. 16 years old C. 24 years old D. 32 years old
Mathematics
2 answers:
Llana [10]2 years ago
8 0

Answer:

B. 16 years

Step-by-step explanation:

Now, let the age of Damon be x

Because Nora is 3 times as old as Damon, her age in terms of x is 3x

In eight years time, Damon's age will be

x + 8

Because Nora will be 2 times as old as Damon, her age will then be

2(x + 8)

We write mathematical equation for the whole problem

x + 2(x + 8) = 3x + x + 8

x + 2x + 16 = 4x + 8

16 - 8 = 4x - 2x - x

x = 8

Recall that x denotes the age of Damon now.

Also Damon's age in 8 years time

= x + 8

\implies 8 + 8 = 16 yrs

Lelu [443]2 years ago
6 0

Answer:

16 years old

Step-by-step explanation:

D=Damon     N=Nora     N=3D

3D-8=2D

D=8

Currently Damon is 8

I 8 years will be 16

Nora now is 24(8*3)

In 8 years will be 32 (3*8)

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c

Step-by-step explanation:

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2 years ago
A producer of electronic book readers is performing a quality check to ensure the reader's backlight is working correctly. The p
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Answer: 25

Step-by-step explanation:

From the question, we are told that a producer of electronic book readers is performing a quality check to make sure that the reader's backlight is working correctly. Then, the plant manager tests 2,000 readers on Monday and finds that 8 have defective backlights. The fraction 1/x is the experimental probability of a book reader having a defective backlight. What is the value of x?

Number of tested readers= 2000

Defective backlight = 8

Probability of having a defective backlight will be the number of defective backlight divided by the number of readers tested. This will be:

= 8/200

We reduce the nice fraction to its lowest term.

8/200 = 1/25

Therefore x will be 25

8 0
2 years ago
paper clips are sold in boxes of 1000. each box costs £15.40. ethan orders 5 boxes of paper clips. work out the discount ethan g
torisob [31]

Step-by-step explanation:

Total money = 15.40 × 5 = 77

Ethan gets 5 boxes for 77

4 0
2 years ago
Read 2 more answers
In the figure the horizontal lines are parallel and ab=bc=cd if lm =5 find jm
Leviafan [203]
Answer is c or 10

thanks!
7 0
2 years ago
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Jake made a total of 7 copies at a copy shop, with some being black-and-white copies and some being color copies. Black-and-whit
Arada [10]
Jake spent a total of 70 cents.
b = black-and-white = 8 cents
c = color = 15 cents

70 = 8b + 15c

he made a total of 7 copies
b + c = 7

system of equation:
70 = 8b + 15c
b + c = 7

--------------------------

b + c = 7
b + c (-c) = 7 (-c)
b = 7 - c

plug in 7 - c for b

70 = 8(7 - c) + 15c
Distribute the 8 to both 7 and - c (distributive property)

70 = 56 - 8c + 15c
Simplify like terms

70 = 56 - 8c + 15c
70 = 56 + 7c

Isolate the c, do the opposite of PEMDAS: Subtract 56 from both sides

70 (-56) = 56 (-56) + 7c
14 = 7c

divide 7 from both sides to isolate the c

14 = 7c
14/7 = 7c/7
 c = 14/7
 c = 2

c = 2
---------------

Now that you know what c equals (c = 2), plug in 2 for c in one of the equations.
b + c = 7
c = 2
<em>b + (2) = 7
</em><em />Find b by isolating it. subtract 2 from both sides
b + 2 = 7
b + 2 (-2) = 7 (-2)
b = 7 - 2
b = 5

Jake made 5 black-and-white copies, and 2 color copies

hope this helps
8 0
2 years ago
Read 2 more answers
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