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avanturin [10]
3 years ago
6

How do I find a percentage from a discount​

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
5 0

Answer:

Subtract the post-discount price from the pre-discount price.

Divide this new number by the pre-discount price.

Multiply the resultant number by 100.

Step-by-step explanation:

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Tennis racket marked up 50% to $36.76
Kaylis [27]
I asssume we want to find the original price
so marked up 50% means if original price=100, then marked up price=50+100=150%

so
36.76=150%
hack, since 150=3 times 50 and 2 times 50=100, divide 36.76 by 3 then mutiply by 2

36.76=150%
divide both sides by 3
12.25333333333=50%
multiply both sides by 2
24.5=100%
original price=$24.50

4 0
3 years ago
Mark ran a mile in 7 1/2 minutes. His brother ran a mile in 6 1/6 minutes. How much more time does Mark take to run the mile?
Bas_tet [7]

Answer:

1 1/3 more minutes

Step-by-step explanation:

Lets first convert both times to improper fractions

7 1/2 -> 15/2 (Mark's Time)

6 1/6 -> 37/6 (Mark's Brother's Time)

Now we need common denominators

15/2 = 45/6

Now times to subtract Mark's time - Mark's Brother's Time = More Time

45/6 - 37/6 = 8/6 or 1 2/6 = 1 1/3

6 0
3 years ago
1
Brrunno [24]
The answer to the question is B
6 0
3 years ago
How do I solve these questions?
PSYCHO15rus [73]

Function rule:  a = 20w + 115

Slope: 20

Initial value: 115

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

We start with $115 in the account. This is the initial value. Each week we add on $20.

So we add $20 for 1 week

We add 2*20 = $40 for 2 weeks

We add 3*20 = $60 for 3 weeks

etc etc

In general, we add 20*w dollars for w weeks onto 115 to get a = 20w+115

The slope is 20 because this is the rate of change, ie how fast the account grows. It grows 20 dollars per week.

4 0
3 years ago
Can anyone help? Will give Brainly + 20 pts .
katen-ka-za [31]

Answer:

<em>She invested 1600 at 8%     (to get the shown $160 interest)</em>

<em>and $7400 at 10%    (to get the shown  640 interest)</em>

<em>If x = 4000 then $80 interest is x2 again = $160</em>

<em>and so forth $320 interest x 2 again = $640</em>

Step-by-step explanation:

<em>The format would always be for x and then where </em>

<em>investment - x = interest  we can work out totals this way and find x.</em>

<em>9000-x = 800  is first equation and substituted into 2nd equation;</em>

<em>0.10x+0.08(9000−x)=800</em>

<em>Use the distributive property to multiply 0.08 by 9000−x.</em>

<em>0.10x+720−0.08x=800</em>

<em>Combine 0.10x and  -0.08x to get 0.02x.</em>

<em>0.02x + 720 = 800</em>

<em>Subtract 720 from both sides.</em>

<em>0.02x=800−720</em>

<em>Subtract 720 from 800 to get 80.</em>

<em>0.02x=80</em>

<em>Divide both sides by 0.02.</em>

<em>x=  80 / 0.02</em>

<em>Make decimals numbers = 1 or above.</em>

<em>80  / 0.02    x 100</em>

<em>x=  8000 / 2</em>

<em>x = 4000</em>

3 0
3 years ago
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