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3 years ago

How do you solve this math problem?

Mathematics

2 answers:

navik [9.2K]3 years ago

6 0

You just do 1/1 then multiply that by 7 which would be 7/7. Then do 7/7 - 3/7 which would be 4/7 (which can not be simplified)

Valentin [98]3 years ago

4 0

7/7 = to 1 whole and has the same denominator as 4/7 so 7/7 minus 4/7 is equal to 3/7

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The radius r and height h of a right circular cone are both increasing at a constant rate of 2 cm/h. At what rate in centimeters

Elden [556K]

Answer:

94.2

Step-by-step explanation:

i honestly dont know if this answer is right but i am currently takeing classes in math about Geometry. We was learning about Word problems, that had to do with volume, Area, and perimeter, and learned what radius is, etc..

So i thought you take the formula it gives you and use. Since Pie means 3.14 you use that in the formula. V= 1×3.14×2×15 = 94.2
you would multiply everything together because every number is close together.
the height is 15 cm, thats how you get 15 at the end.
next step is to solve the equation in your calculator. and it gives you that number. = 94.2

7 0

3 years ago

Find dy du , du dx , and dy dx .

dangina [55]

Answer:

a) $\frac{dy}{du}=5(x^2 +1)^4$ , $\frac{du}{dx}=2x$ , $\frac{dy}{dx}=10x(x^2+1)^4$

b) $\frac{dy}{du}=4(4x^2-x+6)^3$ , $\frac{du}{dx}=8x-1$ , $\frac{dy}{dx}=4(8x-1)(4x^2-2+6)^3$

Step-by-step explanation:

We can use the chain rule in the following form: is u=u(x) is a differentiable function depending on x and y=y(u) is a differentiable function depending on u, then $\frac{dy}{dx}=\frac{dy}{du} \frac{du}{dx}$ .

a) $\frac{dy}{du}=\frac{d}{du} (u^5)=5u^4=5(x^2 +1)^4$ from the power rule.

$\frac{du}{dx}=\frac{d}{dx} (x^2 +1)=2x$ .

From the previous parts and the chain rule, $\frac{dy}{dx}=\frac{dy}{du} \frac{du}{dx}=5(x^2 +1)^4(2x)=10x(x^2+1)^4$

b) $\frac{dy}{du}=\frac{d}{du} (u^4)=4u^3=4(4x^2-x+6)^3$

$\frac{du}{dx}=\frac{d}{dx} (4x^2-x+6)=8x-1$ from the power and sum rules.

Then, $\frac{dy}{dx}=\frac{dy}{du} \frac{du}{dx}=4(4x^2 -x+6)^3(8x-1)=4(8x-1)(4x^2-x+6)^3$

8 0

3 years ago

Can anyone help me understand this better? I will mark the Brainliest :-)

Illusion [34]

The 1st picture= 8xy^2

2nd picture= 8y

3rd picture= 1 over b^3 m^3

4th picture= problem seems to already be simplified

sorry if any are incorrect

8 0

3 years ago

Which function has an inverse that is also a function?

Yakvenalex [24]

The inverse of a function will also be a function if it is a One-to-One function. This means, if each y value is paired with exactly one x value then the inverse of a function will also be a function.

Option C gives us such a function, all x values are different and all y values are different. So inverse of function given in option C will result in a relation which will also be a function.

In all other options, y values are being repeated, which means they are not one to one functions.

So, the answer to this question is option C

3 0

3 years ago

Read 2 more answers

Hey I really need help, like rn!!! What is the scale factor of the triangle dilated from OPQ to OP’Q’ from center O? Explain and

d1i1m1o1n [39]

Answer:Because of P'Q'//PQ. Use theorem Thales so we will have OQ'/OQ=P'Q'/PQ=OP'/OP=2/5

I don't know if you study this theorem or not?

7 0

3 years ago

Read 2 more answers