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vivado [14]
3 years ago
10

James has just sold his motorbike for £1,890.  He bought the motorbike for £2,700.  What fraction of the original cost did he se

ll the bike for?
Mathematics
1 answer:
mihalych1998 [28]3 years ago
8 0
Since the original cost is 2700, the fraction 1890 is of 2700 is 1890/2700. Since they both have a 0 at the end, we can cross that out to get 189/270. Next, since their digits add up to factors of 3 (1+8+9=18 and 2+7=9), we can factor 3 out to get 63/90. Repeating the process since these are factors of 3 too, we get 21/30. Doing it yet again since 21 and 30 are factors of 3, we get 7/10 as our answer
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Find equation of set of points pieces that its distance from the point 3, 4, -5 and -2, 1, 4 are equal.
Gnesinka [82]

Answer:

Step-by-step explanation:

Suppose we a point P(x,y,z) such that its distance from either the point A(3,4,-5) or B(-2,1,4) is the same.

Using this information we can formula:

distance AP = distance BP

first, let's find the distance from AP, using the distance formula.

r = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2 + (z_1 - z_2)^2}

AP = \sqrt{(3 - x_2)^2 + (4 - y_2)^2 + (-5 - z_2)^2}

similarly, we can find the distance BP

BP = \sqrt{(-2 - x_2)^2 + (1 - y_2)^2 + (4 - z_2)^2}

since both distances are exactly the same we can equate them

AP = BP

\sqrt{(3 - x_2)^2 + (4 - y_2)^2 + (-5 - z_2)^2} = \sqrt{(-2 - x_2)^2 + (1 - y_2)^2 + (4 - z_2)^2}

we can simplify it a bit squaring both sides, and getting rid of the subscripts.

(3 - x)^2 + (4 - y)^2 + (-5 - z)^2 = (-2 - x)^2 + (1 - y)^2 + (4 - z)^2

what we have done here is formulated an equation which consists of any point P that will have the same distance from (3,4,-5) and (-2,1,4).

To put it more concretely,

This is the equation of the the plane from that consists of all points (P) from which the distance from both (3,4,-5) and (-2,1,4) are equal.

3 0
2 years ago
A litre bottle of KERPOW washing up liquid costs £1.95.
Alex_Xolod [135]

Answer:

<u>500 washes</u>

Step-by-step explanation:

<u>Number of washes</u>

  • Total volume / Volume used each time
  • 5 L / 10 mL

But remember : 1 L = 1000 mL

  • 5000 mL / 10 mL
  • <u>500 washes</u>
4 0
2 years ago
Parker has saved $1,200 for him and his
charle [14.2K]

Answer:

I mean I think he is because the interest is less now, I still think it's irresponsible to take from his savings but ¯\_(ツ)_/¯

3 0
3 years ago
2/3p = 16 What is the value of p?
tatuchka [14]

Answer:

24

Step-by-step explanation:

P is equal to 16 divided by 2/3, therefore, you can multiply 16 by the reciprocal  

of 2/3, which would be 3/2, and you get 24. Hope it helped :)

3 0
3 years ago
Read 2 more answers
Question 2(Multiple Choice Worth 5 points)
serg [7]

Answer:

#1 d= 49t

Step-by-step explanation:

#2 Since the greatest value of n is 9, it means that the value of n is less than or equal to 9. But the values of n cannot be greater than 9. So, we will be using the sign of less than or equal to in the inequality. Thus, (D) is the correct option.

#3 is (29)

#4 is n=15

#5 is y = 7x

#6 is y=7x

8 0
2 years ago
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