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Ivanshal [37]
2 years ago
15

What are the X - and y-intercepts of the equation 7x + 3y = 21 ?

Mathematics
1 answer:
VMariaS [17]2 years ago
4 0

Answer:

X intercept: -y

Y intercept: -x

I hope this correct and it helps!

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Write a function describing the relationship of the given variables.
Oliga [24]

Answer:

The function describing the relationship of V and t is V = 3t²

Step-by-step explanation:

* Lets explain the meaning of direct variation

- The direct variation is a mathematical relationship between two

  variables that can be expressed by an equation in which one

  variable is equal to a constant times the other

- If Y is in direct variation with x (y ∝ x), then y = kx, where k is the

 constant of variation

* Now lets solve the problem

# V is varies directly with the square  of t

- Change the statement above to a mathematical relation

∴ V ∝ t²

- Chang the relation to a function by using a constant k

∴ V = kt²

- To find the value of the constant of variation k substitute V and t

 by the given values

∵ t = 6 when V = 108

∵ V = kt²

∴ 108 = k(6)² ⇒ simplify the power 2

∴ 108 = 36k ⇒ divide both sides by 36 to find the value of k

∴ 3 = k

- The value of the constant of variation is 3

∴ The function describing the relationship of V and t is V = 3t²

3 0
3 years ago
Nikita calculated the volume of the right triangular prism. Her work is shown below.
Zinaida [17]

It is B. Nikita used the wrong measurements when finding the area of the base. Please give a like. I Promise this is correct and if its not you can yell at me and all that! :)

6 0
3 years ago
Read 2 more answers
Select all that apply.
julia-pushkina [17]

Answer:

10/15 8/12 14/21

Step-by-step explanation:

3 0
3 years ago
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ur a HS photographer taking pictures fir 2 classes of 21 students each. on average, each individual pic takes 3 minutes and a cl
goblinko [34]
2 classes of 21 students each
21 × 2 classes = 42 students in total
42 × 3 mins = 126 minutes for 42 students
10 mins for 2 class pics = 20 minutes
126 + 20 = 146 minutes = 2 hours and 26 minutes

It should take 146 minutes (2 hours and 26 minutes) to take all the pictures.
6 0
3 years ago
Which expression is equivalent to 3\tfrac{1}{3}-8\tfrac{2}{3}3
Sholpan [36]

Answer:

and yeah ikr I don't understand why

3 0
3 years ago
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