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MissTica
3 years ago
7

Work out the percentage change when a price of £70 is decreased to £49 ​

Mathematics
1 answer:
Monica [59]3 years ago
5 0

Answer:

30% decrease in price

Step-by-step explanation:

Since 70-49=21, we know that the price decreased by 30 pounds. The formula to find a percentage decrease is that you should then divide the original number(70) by 21(that equals 0.3!) 0.3 as a percentage would then be 30%, so the answer is there is a 30% decrease in price.

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The simple interest formula is A = P(1 + r)t where P represents the amount originally deposited, r is the interest rate, and A i
xxMikexx [17]
To find this, you just need to plug it in and use some algebra to figure it out.
Initial:                                 2700 = 2200(1 + r)5
multiply 2200 and 5:             2700 = 11000(1 + r)
Divide both sides by 11000:     .24 = 1 + r
subtract both sides by 1:        -.754 = r

The problem is, a negative interest rate makes no sense if there was actually an increase of 500. We can try distributing the 11000 instead
Where we left off:                              2700 = 11000(1 + r)
Distribute the 11000:                         2700 = 11000 + 11000r
Subtract 11000 from both sides:        -8300 = 11000r
Divide both sides by 11000:                -.754 = r

As you can see, both methods reached the same impossible answer. I'm assuming that you didn't type out the equation right. Are you sure it wasn't 
2700 = 2200(1 - r)5
? If you subtract the r to make it negative, it might make more sense. But that still leaves us with a .754 rate of interest, which seems too high. Double check where you're typing from
3 0
3 years ago
The sum of two numbers is - 10. If one number is subtracted from the other, their difference is - 8. Find the numbers.
Lera25 [3.4K]

Answer:

the sume of two numbers is 2. if one number is subtracted from the other, their difference is 8. find the numbers---->

Step-by-step explanation:

X+Y=2

X-Y=8

If you subtract X+Y with X-Y, you get 2y, and so that equals 2-8, that is -6.

2y=-6

y=(-6)/2

y=-3

-3+X=2

x=2+3

x=5 and y=-8

Check

-3+5=2

5-(-3)=8

3 0
3 years ago
24 = -6 (m+1) + 18 <br><br> What is the answer?
Nataly_w [17]

Answer:

m = -2

Step-by-step explanation:

<em>Distribute first.</em>

24 = -6(m+1) + 18

24 = -6m - 6 + 18

<em>Then you combine like terms.</em>

24= -6m + 12

<em>Then you still combine like terms. You subtract 12 from each side.</em>

24 = -6m + 12

-12            - 12

12= -6m

<em>Then divide by -6 to isolate the variable.</em>

12 = -6m

/-6     /-6

-2 = m

<em />

8 0
4 years ago
A carpenter goes through 3.4 boxes of nails
jeka57 [31]

4.5 boxes of nails are required for finishing 2 tables

Step-by-step explanation:

Given:

3.4 boxes of nails  are required for finishing 1.5 tables

Required:

How much boxes of nails would he use  for finishing 2 tables

Solution:

We can solve using Unitary Method:

Nails needed to finish 1.5 tables = 3.4 boxes

Nails needed to finish 1 table = \frac{3.4}{1.5}\,\,boxes

Nails needed to finish 2 tables = \frac{3.4}{1.5}*2 =4.5\,\,boxes

So, 4.5 boxes of nails are required for finishing 2 tables.

Keywords: Word Problems

Learn more about Word Problems at:

  • brainly.com/question/11007026
  • brainly.com/question/10978510
  • brainly.com/question/10717746

#learnwithBrainly

4 0
3 years ago
34+0+18+26 use properties to find the sum or product please show work I’ll give 20 points the picture is an example of what you
lora16 [44]
6 x 89 is 534
6 x (90 - 1) is 534. BUT you have to subtract 90 from 1 and that's 89. So then you multiply 6 by 89.
6 x 90 is 540 and 6 x 1 is 6. you take 540 subtract 6 and that's 534.
540 - 6 is 534.
8 0
4 years ago
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