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3 years ago

Diego measured the length of a pen to be 22 cm.

Mathematics

2 answers:

nikklg [1K]3 years ago

5 0

4.5!!! Oh and also good luck

solmaris [256]3 years ago

4 0

Answer:

Step-by-step explanation:

From the question, we are informed that Diego measured the length of a pen to be 22 cm while the actual length of the pen is 23 cm.

The percentage decrease:

= (23 - 22)/22 × 100

= 1/22 × 100

= <em>4.5%</em>

good luck :)

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A washer and a dryer cost $750 combined.The cost of the washer is 2 times the cost of the dryer. What is the cost of the dryer

neonofarm [45]

Answer:

Cost of dryer is $250

Cost of washer is $500

Step-by-step explanation:

Let the cost of the dryer be - x

Then, cost of washer = 2x

To find x,

x+2x= $750

3x=$750

x=$750/3

x=$250

Hope this helps you mate.

8 0

3 years ago

7. Jennifer is 6 years older than Sue. In 4 years, she will be twice as old as Sue was 5 years ago. Find their ages

makvit [3.9K]

Answer: Sue is 20 and Jennifer is 26

Step-by-step explanation:

Let's say that J=Jennifer's age now and S=Sue's age now.

We know that:

J=S+6

Because Jennifer is 6 years older than Sue.

We also know that when Jennifer is 4 years older (J+4), she will be twice as old as Sue was 5 years from now (S-5).

So we get the following equation from that information:

J+4=2(S-5)

So we have the two equations:

J+4=2(S-5)

J=S+6

Let's substitute J=S+6 into the first equation (note that RHS means Right Hand Sie and LHS means Left Hand Side):

(S+6)+4=2(S-5)

S+10=2S-10 [Add 6+4 on the RHS, and distribute on the LHS]

S=2S-20 [Subtract 10 from both sides]

-S=-20 [Subtract 2S from both sides]

S=20 [Divide both sides by -1]

So we know S, which is Sue's age, is 20. So Sue is no 20 years old.

Finding Jennifer's age now is simple. We know Jennifer is 6 years older than Sue, and Sue is 20, so Jennifer is 26 years old.

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3 years ago

What is the solution to the system of equations? 2x – y = 7 y = 2x 3

velikii [3]

Answer:

I will assume the second equation is y=2x^3. If it is y=2x+3 or y=2x-3, the lines will never intersect: they have the same slope (2):

Step-by-step explanation:

2x – y = 7 can be rewritten as: y = 2x -7. It has a slope of 2. The second equation, y = 2x 3, isn't clearly written. If the 3 has a plus or minus sign, then the lines will never intersect: they have the same slope, 2.

I'll assume the second equation is y=2x^3.

See attached graph.

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2 years ago

A bag contains 3 red marbles, 4 blue marbles, and 6 green marbles. Which pair of events are complementary events? A) choosing a

kotykmax [81]

Answer:

Event D

Step-by-step explanation:

Complementary events are those events that are opposites of each other. i.e. in this case the complementary event for choosing a green marble is not choosing a green. It has nothing to do with choosing or not choosing marbles of colors other than green.

7 0

4 years ago

Determine f(2) where f(x)= x+1/4x-2

taurus [48]

F(2)= (2)+1/4(2)-2
F(2)=3/6
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3 0

3 years ago