Answer:
3240 in^3
Step-by-step explanation:
Step one:
given data
The dimension of the form
Length 40 and 1/2 inches long,
Depth 10 inches deep,
The width and 8 inches high
Step two:
The amount of cement is equivalent to the volume of the form
![V=L*W*H\\\\V=40.5*10*8\\\\V=3240 in^3](https://tex.z-dn.net/?f=V%3DL%2AW%2AH%5C%5C%5C%5CV%3D40.5%2A10%2A8%5C%5C%5C%5CV%3D3240%20in%5E3)
Hence the volume of cement is 3240 in^3
Answer:
Hi there!
Your answer is:
the number is 68
Step-by-step explanation:
(18-n) /2 = -25
×2
(18-n) = -50
-18
-n = -68
/-1
n= 68
Plug it back in!
(18-68) /2 = -25 ???
-50/2 = -25 ✓✓✓
Hope this helps
Given the equation: (km / 3) - 2x = 4, it is essential to isolate x to obtain the expression to solve it. This is done below:
(km / 3<span>) - 2x = 4
</span>
Adding 2x to both sides:
(km / 3<span>) - 2x + 2x = 4 + 2x
</span>(km / 3<span>) = 4 + 2x
</span>
Subtracting 4 from both sides:
(km / 3<span>) - 4 = 4 + 2x - 4
</span>(km / 3<span>) - 4 = 2x
</span>
Dividing 2 from both sides:
[(km / 3<span>) - 4] /2 = 2x /2
</span>[(km / 3<span>) - 4] /2 = x
</span>x = (km / 6) - 2
Answer:
P=0.66
Step-by-step explanation:
We know that Among 9 electrical components, exactly one is known not to function properly. If 3 components are randomly selected.
We calculate the probability that all selected components function properly.
We calculate the number of possible combinations:
![C_3^9=\frac{9!}{3!(9-3)!}=84](https://tex.z-dn.net/?f=C_3%5E9%3D%5Cfrac%7B9%21%7D%7B3%21%289-3%29%21%7D%3D84)
We calculate the number of favorable combinations:
Therefore the probability is:
![P=\frac{56}{84}\\\\P=0.66](https://tex.z-dn.net/?f=P%3D%5Cfrac%7B56%7D%7B84%7D%5C%5C%5C%5CP%3D0.66)
For the first problem, when you see expression like that it just means to write it twice, then FOIL it.
(2x-6) (2x-6)
If you don't know what FOIL is let me know and I can further explain it!
This also applies for the second question!