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2 years ago

15

Help Pleeeeease!!!!!

2 answers:

yan [13]2 years ago

3 0

Answer:

Step-by-step explanation:

um

ratelena [41]2 years ago

3 0

Answer: don't know sorry

Step-by-step explanation:

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Need help with my homework

Volgvan

Answer:

$\displaystyle y=\frac{16-9x^3}{2x^3 - 3}$

$\displaystyle y=-\frac{56}{13}$

Step-by-step explanation:

<u>Equation Solving</u>

We are given the equation:

$\displaystyle x=\sqrt[3]{\frac{3y+16}{2y+9}}$

i)

To make y as a subject, we need to isolate y, that is, leaving it alone in the left side of the equation, and an expression with no y's to the right side.

We have to make it in steps like follows.

Cube both sides:

$\displaystyle x^3=\left(\sqrt[3]{\frac{3y+16}{2y+9}}\right)^3$

Simplify the radical with the cube:

$\displaystyle x^3=\frac{3y+16}{2y+9}$

Multiply by 2y+9

$\displaystyle x^3(2y+9)=\frac{3y+16}{2y+9}(2y+9)$

Simplify:

$\displaystyle x^3(2y+9)=3y+16$

Operate the parentheses:

$\displaystyle x^3(2y)+x^3(9)=3y+16$

$\displaystyle 2x^3y+9x^3=3y+16$

Subtract 3y and $9x^3$ :

$\displaystyle 2x^3y - 3y=16-9x^3$

Factor y out of the left side:

$\displaystyle y(2x^3 - 3)=16-9x^3$

Divide by $2x^3 - 3$ :

$\mathbf{\displaystyle y=\frac{16-9x^3}{2x^3 - 3}}$

ii) To find y when x=2, substitute:

$\displaystyle y=\frac{16-9\cdot 2^3}{2\cdot 2^3 - 3}$

$\displaystyle y=\frac{16-9\cdot 8}{2\cdot 8 - 3}$

$\displaystyle y=\frac{16-72}{16- 3}$

$\displaystyle y=\frac{-56}{13}$

$\mathbf{\displaystyle y=-\frac{56}{13}}$

8 0

2 years ago

Gail collects trading cards. Her favorites are baseball and football cards. For

mamaluj [8]

I think it’s c but don’t go with me see if others answer with a different answer :)

8 0

2 years ago

Read 2 more answers

What is the radius of a circle with a circumference of 36(3.14) cm

mart [117]

It should be 18, because despite of 3,14, because that's pi and radius is half of the diameter, so36 divide 2 is 18.

6 0

3 years ago

6ft and 10ft =? it's the pythagorean theorem

anyanavicka [17]

Answer:

11.7

Step-by-step explanation:

pythagorean theorem is $A^{2} +B^{2}=C^{2}$

apply that same formula soo $6^{2} +10^{2}=136^{2}$

then sqaure root 136 $\sqrt{136} =11.66190379$

round that soo now the answer is 11.7

7 0

2 years ago

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For the rectangular prism shown, answer the following questions. Write your number

rewona [7]

The area is 20
The height is 5
The volume is 60
The surface area is 94

6 0

3 years ago