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MAVERICK [17]
2 years ago
11

Grade 8 Math 8

Mathematics
2 answers:
puteri [66]2 years ago
5 0
Yes they are all right
enyata [817]2 years ago
5 0
They are all correct!
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The opposite of cubing is?
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cube rooting?

Step-by-step explanation:

like the cubed root of something

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If a rectangle is 2 meters more than its width, and the area of it is 80 square meters, what is the length and width?
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Ok I think it means that the length l of the rectangle is 2 m more than is width w...
The area is A=l*w=(w+2)*w=80
so: w^{2} +2w-80=0
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A^4 b^2÷4a^3 b^-2<br><img src="https://tex.z-dn.net/?f=%20%20%7Ba%7D%5E%7B4%7D%20%7Bb%7D%5E%7B2%7D%20%20%5Cdiv%204%20%7Ba%7D%5E%
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1 year ago
Which region represents the solution to the given system of inequalities?
Phoenix [80]

Answer: The intersection region shown in the graph attached is the solution of the system of inequalities.

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

y=mx+b

Where "m" is the slope and "b" is the y-intercept.

 Given the following system of inequalities:

\left \{ {{x+3y\leq-3 } \atop {x\geq3 }} \right.

We need to graph the lines.

We have the line:

x+3y=-3

Solving for "y", we get:

3y=-x-3\\\\y=\frac{1}{3}x-1

Knowing that m=-\frac{1}{3} and b=-1, we can graph it.

Since the symbol is \leq, the line must be solid.

The other line is:

x=3

Since "x" only takes one value, we can identify that it is a vertical line, so we can graph it.

Since the symbol is \geq, the line must be solid.

We need to substitute a point that is not on the line, into each inequalities. Let's choose the point (0,0).

Then:

0+3(0)\leq-3\\\\0\leq-3

This is false, therefore, we must shade the half that does not contain this point.

0\geq 3

This is false, so we must shade the half that does not contain this point.

The intersection region of the solutions (Observe the graph attached) of the given inequalities is the solution of the system of inequalities.

8 0
3 years ago
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