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Pie
3 years ago
13

Select the correct answer.

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
5 0

Answer:

The answer is D). x=-4 \pm \sqrt{13}

Step-by-step explanation:

Just use the quadratic formula and plug in for solution.

For reference:

x=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a} is the quadratic formula.

In this equation: a = 1, b = 8, and c = 3

enot [183]3 years ago
4 0

Answer:

B

Step-by-step explanation:

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A line passes through the points (0, 9) and (9, 19). What is its equation in slope-intercept form?
STatiana [176]

Answer:

y = 10/9x + 9

Step-by-step explanation:

To write the equation in its slope-intercept form, y = mx + b, we need to find the slope (m) of the line and its y-intercept (b).

Given the points (0, 9) and (9, 19), we can solve for the slope of the line using the following formula:

m = \frac{y2 - y1}{x2 - x1}

Let (x1, y1) = (0, 9)

and (x2, y2) = (9, 19)

Substitute these values on the formula:

m = \frac{y2 - y1}{x2 - x1} = \frac{19 - 9}{9 - 0} = \frac{10}{9}

Therefore, the slope (<em>m </em>) = 10/9.

Next, the <u>y-intercept</u> is the point on the graph where it crosses the y-axis, and has the coordinates, (0, <em>b </em>). It is also the value of the y when x = 0.

One of the given points is the y-intercept of the line, given by (0, 9). The y-coordinate, 9, is the value of b.

Therefore, the linear equation in slope-intercept form is: y = 10/9x + 9

3 0
2 years ago
Use the slope-intercept form of the linear equation to write the equation of the line with the given slope and y-intercept.
Nesterboy [21]

Answer:

y = -5x + 8

Step-by-step explanation:

Slope intercept form is:

y = mx + b

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

Since the question gives you these values, all you need to do is plug it in. (x and y remain the same).

y = -5x + 8

I hope this helps!

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2 years ago
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The answer is b. 60 || 4x10=40, 40+20=60
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3 years ago
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