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Scilla [17]
3 years ago
11

If ralph is 6 and his sister is half his age, how old will Ralphs' sister be when he's 100?

Mathematics
1 answer:
g100num [7]3 years ago
3 0
She will be 97 years old
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Because that’s what I think it is
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Two numbers have a sum of 18, and 4 times the first number minus the second number is equal to 17. What is the smallest number?
sammy [17]

Answer:

The smallest number is 7

Step-by-step explanation:

Using simultaneous equation;

x+y = 18.....(1)

4x-y = 17.....(2)

from equation (1)..

x+y = 18

y = 18-x...(3)

substitute y into equation (2)

4x-y = 17

4x-(18-x) = 17

4x-18+x = 17

4x+x = 17+18

5x = 35

x = 35÷5

x = 7

substitute x into equation (3)

y = 18-x

y = 18-7

y = 11

Therefore; x=7

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the smallest number is 7

4 0
3 years ago
I only have 20 min left it has a timer on me
Fofino [41]

Answer:

it is 3,540ml that is less than 10 L

Step-by-step explanation:


5 0
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Read 2 more answers
Please, I give 20 score. Find the volume
Elza [17]

Answer:

2388.16 in³

Step-by-step explanation:

1) find volume of cylinder

formula: πr²h

given:

π = 3.14

r = 8/2 = 4 in

h = 9 in

\pi \: r {}^{2} h

(3.14) \times (4 {}^{2} ) \times 9

3.14 \times 16 \times 9

452.16 \:  {in}^{3}

2) find volume of cuboid

formula: length × width × height

given:

length = 16 in

width = 11 in

height = 11 in

l \:  \times w \:  \times h

16 \times 11 \times 11

1936 \: in {}^{3}

total volume of figure

= volume of cylinder + volume of cuboid

= 452.16 in³ + 1936 in³

= 2388.16 in³

6 0
3 years ago
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