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Fed [463]
3 years ago
14

Find the area of a circle with a circumference of 31.4 units. help me please

Mathematics
1 answer:
hram777 [196]3 years ago
4 0

Answer:

Area = 78.5

Step-by-step explanation:

31.4 = 2 x pi X r

r = 31.4/(2xpi) = 31.4(2 x 3.14) = 5

Area = pi x r^2 = 3.14 X 5^2 =3.14 x 25 =  78.5 units^2

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At the beginning of the week, a puppy weighed 5 1/4 pounds. During the week, the puppy gains 8 ounces.
lys-0071 [83]

Answer:

5 3/4

Step-by-step explanation:

8 ounces is half (1/2) of a pound

1/2 is equivalent to 2/4

So I added 5 1/4 and 2/4

Which gives us 5 3/4

5 0
3 years ago
In a marching band, there are 24 trombones and 15 drums. Heather says the ratio of trombones to drums is 24:15. Audrey disagrees
anastassius [24]

Answer:both of them are correct

Step-by-step explanation: A ratio is like a fraction you can simplify it so when you simplify 24:15 by 3 it gives you 8:3

5 0
3 years ago
Half the marbles in a bag are red, 1/6 of the marbles are blue, and the remaining 8 marbles are white how many total marbles are
Gemiola [76]

Hey there! I'm happy to help!

Let's represent the total number of marbles with the variable t. We have the following information.

1/2t+1/6t+8=t (1/2 of total are red, 1/6 of total are blue, 8 are white, add them up to get total)

Now, we solve for t.

1/2t+1/6t+8=t

We combine like terms.

2/3t+8=t

We subtract t from both sides.

-1/3t+8=0

We subtract 8 from both sides.

-1/3t=-8

We divide both sides by -1/3.

t=24

Therefore, there ae 24 total marbles in the bag.

Have a wonderful day! :D

7 0
3 years ago
PLEASE HELP ME!!! THANK YOU!
Troyanec [42]

Answer:

82*

Step-by-step explanation:

10x+8 = 12x-10

18 = 2x

X=9

Angle 1 = 98*

Angle 3 = 98*

180 - 98* = 82*

4 0
3 years ago
Read 2 more answers
Mrs.Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What perc
Nady [450]

Answer:

15%

30 percent passed BOTH tests.....Only 15% passed ONLY first test

30/(30+15) = 67% of those who passed the first test ALSO passed the second test.

4 0
4 years ago
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