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3 years ago

9x-4 (x-3)+72 what is X?

Mathematics

2 answers:

spin [16.1K]3 years ago

8 0

Answer:

x = 12

Step-by-step explanation:

9*x-4*(x-3)-(72)=0

Step by step solution :

Step 1 :

Equation at the end of step 1 :

(9x - 4 • (x - 3)) - 72 = 0

Step 2 :

Step 3 :

Pulling out like terms :

3.1 Pull out like factors :

5x - 60 = 5 • (x - 12)

mariarad [96]3 years ago

8 0

Answer:

I think answer is 16.8....

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A cylindrical pressure vessel has a height of 9 feet and a diameter of 6 feet. How much gas can the pressure vessel hold when fu

notka56 [123]

since the diameter of the base of the cylinder is 6 feet, then its radius is half that, or 3 feet.

$\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h~~
\begin{cases}
r=radius\\
h=height\\[-0.5em]
\hrulefill\\
r=3\\
h=9
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5 0

3 years ago

Read 2 more answers

X-4y=-21<br> 8y-x=45<br> Solve the system <br> (X,y)=

meriva

Answer:

$\displaystyle (3, 6)$

Step-by-step explanation:

{x -4y = −21

{8y - x = 45

_________

$\displaystyle \frac{4y}{4} = \frac{24}{4} \\ \\$

$\displaystyle y = 6$ [Plug this back into both equations above to get the x-coordinate of 3]; $\displaystyle 3 = x$

I am joyous to assist you anytime.

6 0

4 years ago

Element X decays radioactively with a half-life of eight minutes. If there are 800 g of element X, how long, to the nearest 10th

Harman [31]

Answer: 41.5 min

Step-by-step explanation:

This problem can be solved with the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=22 g$ is the final amount of the radioactive element

$A_{o}=800 g$ is the initial amount of the radioactive element

$t$ is the time elapsed

$h=8 min$ is the half life of the radioactive element

So, we need to substitute the given values and find $t$ from (1):

$22 g=(800 g) 2^{\frac{-t}{8 min}}$ (2)

$\frac{22 g}{800 g}=2^{\frac{-t}{8 min}}$ (3)

$\frac{11}{400}=2^{\frac{-t}{8 min}}$ (4)

Applying natural logarithm in both sides:

$ln(\frac{11}{400})=ln(2^{\frac{-t}{8 min}})$ (5)

$-3.593=-\frac{t}{8 min}ln(2)$ (6)

Clearing $t$ :

$t=41.46 min \approx 41.5 min$ This is the time elapsed

7 0

3 years ago

What is the slope of the graph y=-1

pochemuha

This is a horizontal line passing through the point (0,-1).

Slope = zero.

4 0

3 years ago

What is the surface area of the cylinder?

ruslelena [56]

A= 3631.68

Step-by-step explanation:

the formula to find the surface area is A=2πrh+2πr^2 so when you substitute all your radius values and height values, you get approximately 3631.68

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3 years ago