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vekshin1
3 years ago
7

Simplify the expression 8x + 4(x -1)

Mathematics
1 answer:
s344n2d4d5 [400]3 years ago
6 0
8x+4x-4

12x-4 is the answer
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It takes Mara 50 minutes to walk to her friends house 1 2/3 miles away. What is her walking pace in miles per hour?
Marizza181 [45]
(1 2/3) / 50 = x/60
cross multiply
50x = 60 * 5/3
50x = 100
x = 100/50
x =her walking pace is 2 miles per hr
4 0
3 years ago
P: Las Vegas is the capital of Nevada.<br> q: There are 10 inches in a foot.<br> Use: pvq
AysviL [449]

Answer:

P= Carson City

Q= 12 inches long

8 0
2 years ago
Which of these is a complex number?
Setler79 [48]
The answer is D.

Explanation: The square root of a negative number is imaginary which is another name for a complex number
8 0
2 years ago
(I've been trying to figure this out for 3 days and I really need help)
liq [111]

Check the picture below.

since the diameter of the cone is 6", then its radius is half that or 3", so getting the volume of only the cone, not the top.

1)

\bf \textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=3\\ h=4 \end{cases}\implies V=\cfrac{\pi (3)^2(4)}{3}\implies V=12\pi \implies V\approx 37.7

2)

now, the top of it, as you notice in the picture, is a semicircle, whose radius is the same as the cone's, 3.

\bf \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=3 \end{cases}\implies V=\cfrac{4\pi (3)^3}{3}\implies V=36\pi \\\\\\ \stackrel{\textit{half of that for a semisphere}}{V=18\pi }\implies V\approx 56.55

3)

well, you'll be serving the cone and top combined, 12π + 18π = 30π or about 94.25 in³.

4)

pretty much the same thing, we get the volume of the cone and its top, add them up.

\bf \stackrel{\textit{cone's volume}}{\cfrac{\pi (3)^2(8)}{3}}~~~~+~~~~\stackrel{\stackrel{\textit{half a sphere}}{\textit{top's volume}}}{\cfrac{4\pi 3^3}{3}\div 2}\implies 24\pi +18\pi \implies 42\pi ~~\approx~~131.95~in^

8 0
3 years ago
A school paid $35.25 for each calculator if the school bought x calculator how much did they pay
mel-nik [20]

Answer:

they pay $x*35.25

Step-by-step explanation:

this is the answer

8 0
3 years ago
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