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Katen [24]
3 years ago
11

(I SUCK AT MATHS)If 15 metres of rope costs £22.50, how much would 12 metres cost?​

Mathematics
2 answers:
Nimfa-mama [501]3 years ago
6 0

Answer:

$18

Step-by-step explanation:

22.50×15=1.50

1.50×12=18

UkoKoshka [18]3 years ago
5 0
18 pounds

Take 22.50. Divide by 15
You get 1.5

Then 12 * 1.5 = 18
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A radioactive substance decays exponentially. A scientist begins with 100 milligrams of a radioactive substance. After 27 hours,
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33.3 because 27/50=36/x and x=66.67 and thats how much as decayed after 36 hours but you want what is left so subtract from 100 and get 33.3
7 0
3 years ago
2 cars c and d started to move to each other car c was 118 miles from Boston car d was 256 miles from Boston car c was going twi
Vadim26 [7]

Answer:

131.3 miles

Step-by-step explanation:

The two cars are moving from different directions. The total distance between the two cars = 118 miles + 256 miles = 374 miles.

Let us assume that the two cars meet at point O, let the distance between car c and O be d₁, the distance between car d and point O be d₂, hence:

d₁ + d₂ = 374 miles       (1)

Let speed of car d be x mph, therefore speed of car c = 2x mph (twice of car d). If it take the cars t hours to meet at the same point, hence

For car c:

2x = d₁/t

t = d₁ / 2x

For car d;

x = d₂/t

t = d₂/ x

Since it takes both cars the same time to meet at the same point, therefore:

d₁/2x = d₂ / x

d₁ = 2d₂

d₁ - 2d₂ = 0         (2)

Solving equation 1 and 2 simultaneously gives d₁ = 249.3 miles, d₂ = 124.7 miles

Therefore the distance from point of meet to Boston = 249.3 - 118 = 131.3 miles

7 0
3 years ago
Tommy bought one dozen donuts. He gave one-sixth of the donuts to his wife. He then gave one-fifth of the remaining donuts to hi
statuscvo [17]

Answer:

8

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1/6 of 12 is 2

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Tommy took 8 donuts to work.

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3 years ago
Find the center and radius of the circle.<br> (x + 3)2 + (y + 4)2 =9
Tpy6a [65]

The general equation for any circle with its center at point (a, b) is

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So the circle in the question is centered at (-3, -4), and its radius is  3 .

7 0
4 years ago
How can I solve this equation, 6x + 3y = -12, as y=mx+b?
djyliett [7]

Answer:

y=-2x-4

Step-by-step explanation:

6x + 3y=-12 subtract 6x to other side

3y=-12-6x divide 3 to every number

1y=-4-2x

5 0
3 years ago
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