Please help me))))))))

Mathematics

1 answer:

Rus_ich [418]3 years ago

5 0

For number 9 put the equation in the graphing calculator and see what the outcome is

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Solve for 2x^2-4x+5=6

Softa [21]

To solve for a variable, you need to get it (x) by itself.

2x² - 4x + 5 = 6 Subtract 6 from both sides
2x² - 4x - 1 = 0 Plug this into the Quadratic Formula

a = 2 , b = -4 , c = -1
x = $\frac{-b \pm \sqrt{b^2 - 4ac} }{2a}$ Plug in your values
x = $\frac{-(-4) \pm \sqrt{(-4)^2 - 4(2)(-1)} }{2(2)}$ Simplify
x = $\frac{4 \pm \sqrt{16 + 8} }{4}$ Simplify
x = $\frac{4 \pm 2\sqrt{6} }{4}$ Simplify by removing a 2 from every term
x = $\frac{2 \pm \sqrt{6} }{2}$ Simplify by taking the fraction apart
x = $\frac{2}{2} \pm \frac{ \sqrt{6} }{2}$ Change $\frac{2}{2}$ to 1
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4 0

3 years ago

dan can clean an attic in 13 hours. Imani can clean the same attic in 14 hours. Find how long it would take them if they worked

monitta

13.5

14+13=27
27÷2=13.5

7 0

3 years ago

Hello the question is in the picture ( only C)

pav-90 [236]

SOLUTION:

A normal distribution would model this situation because the distribution is approximately symmetrical, thus the mean, median and mode are approximately the same and the population size is large ( greater than 30).

6 0

1 year ago

The distance between the points (-1, -6) and (-19, -6) is units

Vladimir [108]

Answer:

Step-by-step explanation:

$\sqrt{ {( - 9 - - 1)}^{2} + {( - 6 - - 6)}^{2} }$