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kykrilka [37]
4 years ago
5

Alisa can ride her bike 2 miles in 7 minutes, how long would it take her to ride 10miles if she rides at the same rate?

Mathematics
1 answer:
Hatshy [7]4 years ago
5 0

Answer:

27

Step-by-step explanation:

2 7/10

go around the world

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Would 2/5x+6/5=y be a proper answer format(i just want to know if it can be =y)
lukranit [14]

yes, it does not matter if the y is at the beginning or at the end. However, most teachers usually prefer to have the y at the beginning as it is easier to read.

6 0
3 years ago
What is the volume of a hollow ball whose other radius is 200m and inner radius of 100m? What is the mass if it is iron?
kati45 [8]

Solution :

Volume of ball = Volume of outer ball - Volume of inner ball

V = \dfrac{4\pi R^3}{3} - \dfrac{4 \pi r^3}{3}\\\\V = \dfrac{4\pi}{3}( R^3 - r^3 )\\\\V = \dfrac{4\pi}{3}( 200^3 - 100^3 )\\\\V = \dfrac{4\pi}{3}(2^3 - 1^3) \times 10^6\\\\V = 2.93 \times 10^7 \ m^3

Now, density of iron is, d = 7300 kg/m³.

So, mass of iron ball is :

m = d\times V\\\\m = 7300\times 2.93 \times 10^7 \ kg\\\\m =  2.14 \times 10^{11}\ kg

Hence, this is the required solution.

5 0
3 years ago
Kaia rewrote the sum 96+12 as 12 (8+1). She used the same method to rewrite the sum 95+15 as 5(19+3). Describe her method and te
djverab [1.8K]
When Kaira wrote 96 +12 as 12(8+1), she "factorized" 12, that is Karira found that 12 is a factor of both 96 and 12.


then she wrote 95+15=5(19+3), that is she factorized 5,

5 is a factor of both 95 and 15 because 95=5* 19 and 15=5*3



To use this method to calculate 38+11 we need 38 and 11 to have some common factor (different from 1),

but 11 is a prime number, that is, it has no factors except 1 and 11. We can only apply the method if 11 is a factor of 38, but it is not.


Answer: The method is called "factorization", and it cannot be applied to calculate 38+11
6 0
3 years ago
A bag contains blue marbles and red marbles, 58 in total. The number of blue marbles is 4 more than 5 times the number of red ma
tatiyna

Answer:

49 blue marbles

Step-by-step explanation:

From the question we are given;

  • Total number of marbles = 58
  • Blue marbles are 4 more than 5 times the red marbles

We need to determine the number of blue marbles;

Assuming the number of red marbles is x

Then, blue marbles will be 5x + 4

Therefore;

x + 5x + 4 = 58

6x + 4 = 58

6x = 54

  x = 9

5x + 4 = 5(9) + 4 = 49

Therefore, the red marbles are 9 while the blue marbles are 49

Hence there are 49 blue marbles

3 0
3 years ago
I need help please, I will give whoever answers this gets brainliest
dusya [7]

Hey!!

H (2,1),(4,3),(6,5),(2,7) is not a function.

please see the attached picture

Hope it helps

Good luck on your assignment

4 0
3 years ago
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