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3 years ago

Is 20 an independent or dependent variable

Mathematics

2 answers:

seropon [69]3 years ago

6 0

Independent. Dependent variable would be an unknown usually shown with a letter (x,y,z).

kirill115 [55]3 years ago

5 0

Independent. A dependent variable would be a letter or symbol that needs a letter or key to be solved.

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Which algebraic equation models the English sentence, a number subtracted from 8 is equal to 4?

kykrilka [37]

let's x represent a number

8-x = 4

3 0

3 years ago

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Someone help I don’t understand

Rina8888 [55]

Answer:

a)C

b)E

Step-by-step explanation:

a) You have to pick a vowel. There are three vowels and a total of 6 letters so it is 3/6 so the answer is C

b) Picking a card that is not T. None of the 6 letters are T so the probablity of picking a card with no T is 1. So the answer is E.

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3 years ago

Water is leaking out of an inverted conical tank at a rate of 6800.0 cubic centimeters per min at the same time that water is be

m_a_m_a [10]

Answer:

6.82 $mt^3/min$

Step-by-step explanation:

By congruence of triangles, the radius r of the cone base when its height is 1 meter satisfies the relation

r/1 = 2.5/6

(See picture attached)

So, r = 0.4166 meters when the water is 1 meter high.

The volume of a cone with radius of the base = R is given by

$V=\frac{\pi R^2h}{3}$

So, the volume of water when it is 1 meter high is

$V=\frac{\pi* 0.(4166)^2}{3}=0.1817\;mt^3$

One minute later, the height of the water is 1 meter + 30 centimeters = 1.30 mt

The radius now satisfies

r/1.3 = 2.5/6

and now the radius of the base is

r = 0.5416 mt

and the new volume of water is $0.3071\;mt^3$

So, the water is raising at a speed of

0.3071-0.1871 = 0.12 $mt^3/min$

This speed equals the difference between the water being pumped and the water leaking,

So,

0.12 = Speed of water being pumped -6.8

and

Speed of water being pumped = 6.8+0.12 = 6.82 $mt^3/min$

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2 years ago

How many real solutions does the system have? {y=−3x−3y=x2−3x+5

Daniel [21]

The answer is 0
I took the test and got it right i hope this helps someone

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3 years ago

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|v|>3 solution to the inequality on the number line

Andrew [12]

On a number line, v would be all the numbers to the left of -3 (for example, |-4|=4 which is greater than 3) and all the values to the right of positive 3. Since it can't equal 3, v=-3 and v=3 are not included on the number line.

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3 years ago