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Tatiana [17]
2 years ago
11

Which of the following is a rational number?

Mathematics
1 answer:
artcher [175]2 years ago
7 0

Hey! Your rational number would be \sqrt{4}

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What is the value of x in the equation-2/5x-2=18
Flura [38]
First we have to isolate the varible

-2/5x-2=18
        +2   +2

-2/5x=20

then divide both sides by -2/5 to get x completely by itself

-2/5x=20
-------  ---
-2/5     -2/5

x=-50

i hope i've helped!
5 0
3 years ago
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The heights of four students in Mrs. Patel;s class are 5 1/2 feet, 5.35 feet, 5 4/10 feet and 5.5 feet. What is the height in fe
kodGreya [7K]
5.35 feet. Just make them all decimals and compare
3 0
2 years ago
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What is the volume of a cone that has a radius of 4 cm and a height of 9 cm?
vodka [1.7K]
For any sort of pyramid or cone, the volume is 1/3 of the volume of a prism with the same base and height. Since the volume of a prism/cylinder is V=Bh, the volume of a pyramid/cone is V=\frac{1}3Bh.

In this case, our base is a circle, which has a radius of 4 cm.
The area of a circle is A=\pi r^2 where r is the radius.
A=\pi (4)^2=\pi (4\times4)=16\pi=B

We now know that our base is 16π cm.
We also know that our height is 9 cm.
Let's plug these into our volume formula.

V=\frac{1}3\times16\pi \times9

Use 3.14 to approximate pi as the question states. 16 × 3.14 = 50.24.

V\approx\frac{1}3\times50.24\times9

We could punch all of that into our calculator to get the same answer, but since 1/3 of 9 is clearly 3, let's just go with that.

V\approx3\times50.24

\boxed{V\approx150.72\ cm^3}
8 0
3 years ago
Read 2 more answers
-m
dimaraw [331]

-m - (7/8) = -10

m = 10 - (7/8)

LCM = 8

m = (80 - 7)/8

m = 72/8

m = 9

hope it helps...!!!

6 0
1 year ago
Based on a kc value of 0.210 and the data table given, what are the equilibrium concentrations of xy, x, and y, respectively?
a_sh-v [17]

The activation energy for the forward and the one for the reverse reaction are similar because they attained chemical equilibrium. A chemical equilibrium happens when both of the reactant and products achieve the same concentration.

4 0
3 years ago
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