45.5 meters in 13 seconds?

Answers

Answer 1

Answer: Speed Formula:

$Speed=\frac { Distance }{ Time }$

*Speed is constant.

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Speed:

$Speed=\frac { 45.5\quad metres }{ 13\quad seconds } =3.5\quad metres\quad per\quad second$

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the ratio of boys to girls in the class is 5:7. there are 36 children in the class. how many more girls then boys are there in the class?

Answers

x - the number of boys
y - the number of girls

The ratio of boys to girls is 5:7.
$(x)/(y)=(5)/(7) \n7x=5y \nx=(5)/(7)y$

There are 36 children in the class.
$x+y=36 \nx=36-y \n \nx=x \n(5)/(7)y=36-y \n(5)/(7)y+y=36 \n(5)/(7)+(7)/(7)y=36 \n(12)/(7)y=36 \ny=36 * (7)/(12) \ny=3 * 7 \ny=21 \n \nx=36-y=15 \n \n 21-15=6$

There are 6 more girls than boys in the class.

What’s the answer to this question

Answers

Answer:

The length is 65 cm and the width is 12 cm

Step-by-step explanation:

A = lw = 780

P = 2 (l+w) = 154

The length is 5 more than 5 times the width

l=5w+5

P = 2 (l+w) = 154

Divide each side by 2

2 /2 (l+w) = 154/2

l+w = 77

Substituting l = 5w+5

5w+5 +w = 77

6w+5 = 77

Subtract 5 from each side

6w +5-5 = 77-5

6w = 72

Divide each side by 6

6w/6 = 72/6

w = 12

Now lets find l

l = 5w+5

l = 5(12)+5

l = 60+5

l = 65

Mary had 18 fish in her fish tank.She transferred 12 of the fish to
her broiher's fish tank. How many
fish were left in Mary's tank?

Answers

Answer:6

Step-by-step explanation:

18-12=6

The answer is 6

So u take 18 - 12

Find the product of 2/3x4/7x14/5

Answers

To multiply fractions, the numerator of the product is the product of the numerators, likewise for the denominators. (2/3) x (4/7) x (14/5) = (2 x 4 x14) / (3 x 7 x 5) = (112) / (105) = 1 and 1/15 .

$(2)/(3) * (4)/(7) * (14)/(5) \n \n = (2*4*14)/(3*7*5) \n \n = (112)/(105) \n \n \boxed{=1 (7)/(105) }$

it takes 3 buckets of water to fill one third of a fish tank how many buckets are needed to fill whole tank

Answers

9 buckets of water because If 1/3 is 3 than you just add 6 more buckets which is 9

9 buckets since 3 equals one third and 6 equals two thirds than that means 9 is all of it

Please answer the question from the attachment.

Answers

5/3 means (5 over 3 since I can't do fractions on this) 5/3-3/3=___ 5-3=2 first you do the numerators You keep the denominator the same since both denominators are 3 Then you put it together and get 2/3 and since 2/3 can't be reduced, 2/3 is the answer

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