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3 years ago

Which of the following expressions is a factor of the polynomial x2 + -x-1?

Mathematics

1 answer:

Crazy boy [7]3 years ago

7 0

Answer:

No solution

Step-by-step explanation:

What you have to do is think of two numbers that when times together it equals -1 and when added together it equals -1.

There is no number that can come out to that, so your answer is:

no solution

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The sides of an equilateral triangle are all 8 units long. What is the length of the triangle’s altitude?

True [87]

Answer:

B or 4 $\sqrt[]{3}$

Step-by-step explanation:

I could be wrong as I'm very new to this math but I believe its 4 $\sqrt{3}$

5 0

2 years ago

I don’t understand how to solve this graph.<br> (Y=MX+B)

Alla [95]

Answer:

The equation of line shown in the graph is $\mathbf{y=-\frac{1}{2}x -1}$

Step-by-step explanation:

We need to find equation of the line shown in graph.

The equation of line will be in slope-intercept form $y=mx+b$ where m is slope and b is y-intercept.

We need to find slope and y-intercept.

Finding y-intercept

Looking at the graph, we can find y-intercept when x =0, the value of y is known as y-intercept.

So, when x =0, y=-1

So, y-intercept is -1

Finding Slope

Now, for finding slope, consider 2 points on graph

(0,-1) and (-2,0)

Slope can be found using formula: $Slope=\frac{y_2-y_1}{x_2-x_1}$

We have $x_1=0, y_1=-1, x_2=-2, y_2=0$

Putting values and finding slope:

$Slope=\frac{y_2-y_1}{x_2-x_1}\\Slope=\frac{0-(-1)}{-2-0} \\Slope=\frac{0+1}{-2-0} \\Slope=\frac{1}{-2} \\Slope=-\frac{1}{2}$

So, slope is $m=-\frac{1}{2}$

Equation of line

Now, equation of line having slope $m=-\frac{1}{2}$ and y-intercept b = -1 is

$y=mx+b\\y=-\frac{1}{2}x -1$

So, equation of line shown in the graph is $\mathbf{y=-\frac{1}{2}x -1}$

5 0

3 years ago

The radius of a circle is 4.3 inches. Using the formula A ≈ 3r2, what is the approximate area of the circle?

xz_007 [3.2K]

Please, use the symbol " ^ " to denote exponentiation. At first I had no idea what you meant by 3r2.

You are using the approx. formula A = 3 r^2 to find the area.
The given radius is 4.3 inches. Subst. this value for r in the above equation.
Find A (keeping in mind that it's an approximation).

6 0

3 years ago

Simplify expression <br> -6-2(3x+8)

KIM [24]

Answer:

-6x-22

Step-by-step explanation:

-6 -2 (3x + 8)

Distribute the 2.

-6 -6x -16

Rewrite the expression.

-6x -6 - 16

Subtract -6 from 16.

The answer is -6x-22

5 0

3 years ago

I need help. Someone please help!

galina1969 [7]

Answer:

a. the tablet will be at 84%

the phone will be at 92%

idk the second question sorry :(((

4 0

4 years ago