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tekilochka [14]
4 years ago
11

The price of a watch was increased by 20% to £144. What was the price before the increase?

Mathematics
1 answer:
hammer [34]4 years ago
6 0

Answer:

120 pounds

Step-by-step explanation:

Since the new cost is 144 pounds and this is 20% more,  this is 120% of the original price. Remember 100+20 = 120. To find the original price set up a proportion with these values:

\frac{144}{x}=\frac{120}{100}

Solve for the original price by cross multiplying numerator with denominator.

x(120) = 144(100)

120x = 14400

x= 120 pounds


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Given the side lengths below, which would not create a right triangle? A. 5, 12, 13 B. 8, 15, 17 C. 6, 8, 10 D. 5, 10, 15
storchak [24]

Answer:

the answer is D. 5, 10, 15

4 0
3 years ago
Robert usually earns $95 per week for
Ghella [55]

The amount of money Robert has this week after buying gas is $172.

<h3>Define arithmetic.</h3>

Mathematical arithmetic is the study of the properties of the standard operations on numbers, such as addition, subtraction, multiplication, division, exponentiation, and root extraction. The area of mathematics known as arithmetic deals with the study of numbers and the numerous operations that can be performed on them. Addition, subtraction, multiplication, and division are the fundamental mathematical operations. The symbols shown above stand in for these procedures.

Given Data

Robert usually earns $95 per week for mowing lawns.

Amount = $95

This week, he doubled his normal earnings,

Amount = $95 × 2

Amount = 190

but, spent $18 on gas for his lawnmower.

Amount = $190 - $18

Amount = $172

The amount of money Robert has this week after buying gas is $172.

To learn more about arithmetic, visit:

brainly.com/question/11559160

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4 0
1 year ago
A circular table has a diameter of 20 inches.what is the area of the table
Effectus [21]
Hello!

To find the area of a circle you do \pi r ^{2}

the "r" stands for radius which is half the diameter

So we do \pi * 10^{2}

Which gives us the answer of 314.16

Hope this helps!
3 0
3 years ago
Read 2 more answers
PLZ HELP OR I FAIL MY TEST
Volgvan

Answer:

time upstream=24/8=3 hours

time downstream=24/12=2 hours

Step-by-step explanation:

If R*T=D, and R is speed + or - current, how can you find the rate without the time, and how can you find the time without the rate?

THE KEY WAS WHEN WE WERE TOLD THAT IT TAKES ONE HOUR LONGER TO GO UPSTREAM THAN DOWNSTREAM BECAUSE T=D/R AND WE ARE TOLD THAT:

D/R(Upstream) minus 1 equals D/R (DOWNSTREAM)



Let x=rate of current

distance(d)=rate(r) times time(t) or d=rt or t=d/r

distance upstream=distance downstream=24 mi

rate upstream=10-x

rate downstream=10+x

time upstream=(distance upstream)/(rate upstream)=24/(10-x)

time downstream=(distance downstream)/(rate downstream)=24/(10+x)

Now, we are told that time upstream minus one hour equals time downstream. So our equation to solve is:

24/(10-x)-1=24/(10+x) Multiply both sides by (10-x)(10+x)

24(10+x)(10-x)/(10-x)-1(10-x)(10+x)=24(10-x)/(10+x)/(10+x) clear fractions


24(10+x)-(10-x)(10+x)=24(10-x) clear parens

240+24x-100-10x+10x+x^2=240-24x subtract 240 from and add 24x to both sides

240-240+24x+24x-100+x^2=240-240-24x+24x collect like terms

x^2+48x-100=0 ----------------quadratic equation in standard form

This equation can be factored:

(x+50)(x-2)=0

x=-50 mph----------------discount the negative value for speed

and

x=2 mph----------------------speed of the current

CK

10-x=10-2= 8 mph -----------------------speed upstream

10+x=10+2=12 mph--------------------------speed downstream

time upstream=24/8=3 hours

time downstream=24/12=2 hours

so 3-2=1----takes 1 hour longer upstream

7 0
3 years ago
I don’t know how to get it
Kaylis [27]

Answer:

3x+7+4x-16= 180 degrees

7x-9=180

7x=189

x= 27

yax= 3x+7

3*27+7= 81+7 = 88

4 0
3 years ago
Read 2 more answers
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