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Dahasolnce [82]
4 years ago
7

David, Malachy and Paul share some sweets in the ratio 5:4:1. David gets 20 more sweets than Paul. How many sweets does Malachy

get?
Mathematics
1 answer:
White raven [17]4 years ago
7 0

Answer:

16

Step-by-step explanation:

ratio is 5:4:1

David: Malachy: Paul

David gets 20 (that is 4 times more than the original ration. so need to multiply everything by 4)

4*4=16

1*4=4

new ration- 20:16:4

So David gets 20

Malachy gets 16

Paul gets 4

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Find the fourth point of a parallelogram given the first three (more than one correct answer is possible): (0,6), (5, -1) and (3
inysia [295]

Answer:

The fourth point of the parallelogram is one point among (-2,2), (2,10) and (8,-12).

Step-by-step explanation:

Given information: The first three vertices of parallelogram are (0,6), (5, -1) and (3,-5).

Let fourth point of the parallelogram is (a,b).

Diagonals of a parallelogram bisect each other. It means midpoint of both diagonals are same.

Midpoint formula:

Midpoint=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

Case 1: If the point (0,6), (5, -1) and (3,-5) are consecutive, then pairs of opposite vertices are (0,6) and (3,-5), (5,-1) and (a,b).

(\frac{0+3}{2},\frac{6-5}{2})=(\frac{5+a}{2},\frac{-1+b}{2})

(\frac{3}{2},\frac{1}{2})=(\frac{5+a}{2},\frac{-1+b}{2})

On comparing both sides, we get

\frac{3}{2}=\frac{5+a}{2}

3=5+a

a=-2

\frac{1}{2}=\frac{-1+b}{2}

1=-1+b

b=2

It means the fourth point of the parallelogram is (-2,2).

Case 2: If the point (0,6), (5, -1) and (3,-5) are not consecutive, then pairs of opposite vertices are (0,6) and (5,-1), (3,-5) and (a,b).

(\frac{0+5}{2},\frac{6-1}{2})=(\frac{3+a}{2},\frac{-5+b}{2})

(\frac{5}{2},\frac{5}{2})=(\frac{3+a}{2},\frac{-5+b}{2})

On comparing both sides, we get

\frac{5}{2}=\frac{3+a}{2}

5=3+a

a=2

\frac{5}{2}=\frac{-5+b}{2}

5=-5+b

b=10

It means the fourth point of the parallelogram is (2,10).

Case 3: If the point (0,6), (5, -1) and (3,-5) are not consecutive, then pairs of opposite vertices are (5,-1) and (3,-5), (0,6) and (a,b).

(\frac{5+3}{2},\frac{-1-5}{2})=(\frac{0+a}{2},\frac{6+b}{2})

(\frac{8}{2},\frac{-6}{2})=(\frac{a}{2},\frac{6+b}{2})

On comparing both sides, we get

\frac{8}{2}=\frac{a}{2}

8=a

\frac{-6}{2}=\frac{6+b}{2}

-6=6+b

b=-12

It means the fourth point of the parallelogram is (8,-12).

5 0
4 years ago
If 588 digits were used to number the pages of a book, how many pages are in this book?
andre [41]

Answer:

294 pages are in this book

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
67-54/86 pls help i dont get it can you also tell me how to do it thanks so much
madam [21]

Answer:

66.3720930233

Step-by-step explanation:

7 0
3 years ago
I am trying to figure out how to answer this equation. I have to show my work for it. 3x-5=6
baherus [9]

Answer:

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Subtract 6 1/4 - 3 5/8 what is it ???
Snowcat [4.5K]

Answer:

21/8

Step-by-step explanation:

Simplify the following:

6 + 1/4 - (3 + 5/8)

Put 3 + 5/8 over the common denominator 8. 3 + 5/8 = (8×3)/8 + 5/8:

6 + 1/4 - (8×3)/8 + 5/8

8×3 = 24:

6 + 1/4 - (24/8 + 5/8)

24/8 + 5/8 = (24 + 5)/8:

6 + 1/4 - (24 + 5)/8

24 + 5 = 29:

6 + 1/4 - 29/8

Put 6 + 1/4 - 29/8 over the common denominator 8. 6 + 1/4 - 29/8 = (8×6)/8 + 2/8 - 29/8:

(8×6)/8 + 2/8 - 29/8

8×6 = 48:

48/8 + 2/8 - 29/8

48/8 + 2/8 - 29/8 = (48 + 2 - 29)/8:

(48 + 2 - 29)/8

| 1 |  

| 4 | 8

+ | | 2

| 5 | 0:

(50 - 29)/8

| 4 | 10

| 5 | 0

- | 2 | 9

| 2 | 1:

Answer:  21/8

7 0
4 years ago
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