3 years ago

If Y is directly proportional to X² and y=21 when x=2, find the value of y when X=4.

Mathematics

2 answers:

kykrilka [37]3 years ago

8 0

Step-by-step explanation:

it means y/x^2=k

when y=21, x=2; k is 21/4.

when x=4, k is y/16.

k=21/4=y/16.

the next step is easy to see, you can do it.

frozen [14]3 years ago

7 0

The value of y will probably be 4.

You might be interested in

Pls help I literally have no clue what this means

Elina [12.6K]

Answer:

I think the answer is c -2

Step-by-step explanation:

but don't quote me on that and if it's wrong i truly am sorry

8 0

2 years ago

Read 2 more answers

IS THIS CORRECT?

Tems11 [23]

Answer:
Yes
Explanation:

8 0

2 years ago

Read 2 more answers

Question in photo—————————-

11111nata11111 [884]

Answer:

there is two solutions to that problem. you can find x is equal to two numbers.

7 0

2 years ago

9. A granola recipe calls for 2 cups of

tigry1 [53]

Answer:

6 cups

Materials:

10 cups of almonds

2 batches

2 cups per batch

1 bag per batch

Left Over:

5 - 2 = 3

3 bags left over

2 bags used

6 cups left

7 0

3 years ago

Read 2 more answers

Why the denator in the numerator stay the same

nika2105 [10]

Because it is like having a unit of measurement that is set
lets say that in a certain country, one serving of bread is 1/2 of the standard loaf
and if you have 3 servings, you have 3/2 loaf so the bottom number tells you how many parts out of 1 whole you have

8 0

3 years ago