Solve the quadratic equation for X. 2x2 - 20x + 100 = 0

Mathematics

2 answers:

Mekhanik [1.2K]3 years ago

8 0

Sorry i need points......

AleksandrR [38]3 years ago

5 0

Answer:

x = 5.2

Step-by-step explanation:

First, multiply 2 by 2 to get 4.

Next, find a number or decimal that is when added by 100 will get 0.

My number/decimal choices: {5, 5.1, 5.2, 5.3,}

4 - 104 + 100 = 0

(Couldn't really explain step 2 sorry)

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Write the equation of the

Jet001 [13]

Answer:

$y = \frac{1}{5} x+3$

Step-by-step explanation:

From the given information, we already know two points the line intersects. It states that the line has a y-intercept of 3. The y-intercept is the point at which the line intersects the y-axis. Thus, the line also intersects (0,3). (Remember that all points on the y-axis have an x-value of 0.) Now we have enough information to write an equation.

1) Find the slope of the line with the slope formula, $m = \frac{y_2-y_1}{x_2-x_1}$ . Substitute the x and y values of (-5,2) and (0,3) into the formula and solve:

$m = \frac{(3)-(2)}{(0)-(-5)} \\m = \frac{3-2}{0+5}\\m = \frac{1}{5}$

So, the slope of the line is $\frac{1}{5}$ .

2) Now we can write the equation in slope-intercept form, represented by the formula $y = mx + b$ . Substitute values for $m$ and $b$ in the formula.

The $m$ represents the slope, so substitute $\frac{1}{5}$ for it. The $b$ represents the y-intercept, so substitute $3\\$ for it. This gives the following answer and equation in slope-intercept form: