All categories

3 years ago

Decrease £28 by 7%? im stuck on my homework

Mathematics

1 answer:

Murljashka [212]3 years ago

5 0

Answer:

£26.04

Step-by-step explanation:

The long way is to figure 7% of £28, then decrease that quantity by the amount you figured.

0.07 × £28 = £1.96

£28 - 1.96 = £26.04

I prefer to realize that the 100% of the value, decreased by 7%, will be 93% of the value. Then only one calculator operation is required.

0.93 × £28 = £26.04

_____

<em>Comment on percent</em>

Some folks get confused by percents. "Percent" essentially means "per hundred". The symbol % is a shorthand way to write /100, which means exactly the same thing. That is, 7% = 7/100 = 0.07. (Similarly, ‰ is a shorthand way to write /1000.)

<em>Comment on percentage increase or decrease</em>

When you're talking about a quantity decreased by some amount, as "£28 decreased by £7", you mean the value £7 is subtracted. When you say "decreased by 7%", the interpretation is different. We don't mean that £28 is decreased by 0.07 (to give £27.93); rather we mean £28 is decreased by 7% of £28. That is 7% of £28 is subtracted from £28.

You might be interested in

A ball is tossed up in the air at an initial rate of 50 ft/sec from 5 ft off the ground.

Fofino [41]

Answer with Step-by-step explanation:

Since we have given that

Initial velocity = 50 ft/sec = $v_0$

Initial height of ball = 5 feet = $h_0$

a. What type of function models the height (ℎ, in feet) of the ball after tt seconds?

As we know the function for height h with respect to time 't'.

$h(t)=-16t^2+v_0t+h_0\\\\h(t)=-16t^2+50t+5$

b. Explain what is happening to the height of the ball as it travels over a period of time (in tt seconds).

What function models the height, ℎ (in feet), of the ball over a period of time (in tt seconds)?

if it travels over a period of time then time becomes continuous interval . so it will use integration over a period of time

Our function becomes,

$h(t)=\int\limits^t_0 {-16t^2+50t+5} \, dt$

3 0

3 years ago

Cab companies often charge a flat fee for picking someone up and then charge an additional fee per mile driven.

Dahasolnce [82]

1a.) y=0.5x+2
1b.) The 0.5x is the slope. It represents the amount of extra money you are paying (in addition to the automatic $2) per mile. The y-intercept is 2. That represents the amount you automatically pay for that company.

2.a) I forgot how to do point-slope form, but for 2b., the slope is representing the same thing as in 1a. The slope is .65 and it is representing the amount of money you pay (in addition to the automatic $1.75) per mile.

To find the answers to the table question, use the slope intercept formula, y=.65x+1.75 Plug the numbers they are asking about in for x.

Example: Plugging in 3 we get y=(.65)(3)+1.75 which will equal 3.7 so the amount of money you pay after driving for 3 miles is $3.70.
(:

8 0

3 years ago

What percent of 40 is 28.4?

zalisa [80]

71% of 40 is 28.4

Divide 28.4 by 40:
$\frac{28.4}{40} = 0.71$

Change the decimal to a percentage by multiplying by 100:
$0.71 \times 100 = 71$

6 0

3 years ago

Read 2 more answers

Will Mark Brainlest! The data in the table were collected from two random samples of 50 students. Students were asked their favo

Vika [28.1K]

Answer:

The general population of students prefer to be with their friends. Very minuscule amounts of children prefer being lazy and prefer to either be playing sports or being on social. Please mark brainiest or 5 star thanks

Step-by-step explanation:

5 0

3 years ago

Anyone know the answer???

pav-90 [236]

Answer:

No, those sides do not make a right triangle.

i know that no links are allowed but this helped me solve those types

https://www.omnicalculator.com/math/right-triangle-side-angle

4 0

3 years ago

Read 2 more answers