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Gre4nikov [31]
4 years ago
15

What is 4/9 times what equals 12

Mathematics
1 answer:
Dimas [21]4 years ago
5 0

Step-by-step explanation:

4/9A = 12

A = 12×9/4

= 27

......

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St<br>Question 1<br>Calculate the derivative of y = f(x) = 3 x(4x + 7)<br>Your answer:<br><br>​
kondor19780726 [428]

Answer:

\frac{dy}{dx} = 24 x + 21

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given that the function

      y = f(x) = 3 x ( 4 x + 7)

     y  = 3 x ( 4 x + 7)  

    y = 12 x² + 21 x ..(i)

Differentiating equation (i) with respective to 'x' , we get

\frac{dy}{dx} = 12 (2x) +21 (1)

\frac{dy}{dx} = 24 x + 21

6 0
3 years ago
Given the functions f(x)=7-2x and g(x)=5x-3 find g(f(-4)) find f(g(x))
lara31 [8.8K]

Answer:

g(f(-4)) = -8

f(g(x)) = 13-10x

Step-by-step explanation:

g(f(-4)):

Plug in the equation f(x) into the variable x of g(x), we have:

(gof)= 5(7-2x)-3

Plug in x = -4 and the answer is -8

f(g(x)):
Plug in the equation g(x) into the variable x of f(x), we have:

7-2(5x-3) = 7-10x+6 = 13-10x

3 0
2 years ago
The water level in a pool is currently at 1/2 of an inch. Every hour, the water level increases 4.75 inches. How many hours will
____ [38]

Answer:

7.1 hours

Step-by-step explanation:

Given data

Let the number of hours taken to fill the pool be x

the current quantity is 1/2 the capacity of the pool

we are given that the rate of flow = 4.75 in per hour

let the total amount of water after x hours be y, the expression for the quantity of water is given as

y= 0.5+4.75x

if y= 33.75 in, let us find x

33.75= 0.5+4.75x\\\\33.75-0.5= 4.75x\\\\33.25= 4.75x\\\\

divide both sides by 4.75

x= 33.75/4.75\\\\x= 7.10

Hence, it will take 7.1 hours

6 0
3 years ago
Solve the linear system by graphing x+y=-7 and y =x+3
tangare [24]

Answer:

x= -5

y= -2

Step-by-step explanation:

From the equation y=x+3-------eqn 1

x+y= -7-------eqn2

x+(x+3)= -7 (since there is no value before the bracket is 1, so multiply by 1)

x+x+3= -7

2x+3=-7

2x=-7-3

2x=-10

x=-10/2

x=-5

Insert x value in equation 1

y= -5+3

y=-2

3 0
3 years ago
28 kg of bananas cost $56. How much<br> would 36 kg cost?
zhenek [66]

Answer:

$72

Step-by-step explanation:

$56.00÷28=2. $36.00×2=$72.00

Hope this helps :)

5 0
3 years ago
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