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3 years ago

Find domain and range of graph below! Help please!

Mathematics

1 answer:

olga_2 [115]3 years ago

5 0

Answer:

not sure

Step-by-step explanation:

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What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 ti

Marat540 [252]

Answer:

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

Step-by-step explanation:

Given

$x^2 - 5x - 7 = 0$

Required

Solve for x using:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

First, we need to identify a, b and c

The general form of a quadratic equation is:

$ax^2 + bx + c = 0$

So, by comparison with $x^2 - 5x - 7 = 0$

$a = 1$ $b = -5$ $c = -7$

Substitute these values of a, b and c in

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$x = \frac{-(-5) \± \sqrt{(-5)^2 - 4 * 1 * -7}}{2 * 1}$

$x = \frac{5 \± \sqrt{25 +28}}{2}$

$x = \frac{5 \± \sqrt{53}}{2}$

Split the expression to two

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

To solve further in decimal form, we have

$x = \frac{5 + 7.28}{2}$ or $x = \frac{5 - 7.28}{2}$

$x = \frac{12.28}{2}$ or $x = \frac{-2.28}{2}$

$x = 6.14$ or $x = -1.14$

4 0

3 years ago

It can never equal to a what number ?

vovangra [49]

It may be a negative or a fracton of a number.

5 0

3 years ago

Read 2 more answers

Decrease 1000 Naira by 10%<br><br>

AleksAgata [21]

Answer:

900

Step-by-step explanation:

1,000 degreased by 10%=900

hope this helps

have a great day/night

8 0

3 years ago

Which rectangular equation represents the parametric equations x = 3t Superscript one-half and y = 6t?

Alekssandra [29.7K]

Answer:

Step-by-step explanation:

I got it right

7 0

3 years ago

Can somebody help me with this question

cupoosta [38]

Answer:

93 ft

Step-by-step explanation:

the area of a triangle is :

A = (b*h)/2 where b is the base and h the height(here t)

4092 = (88*t)/2

2*4092 = 88*t

t= (4092*2)/88 = 93 ft

8 0

3 years ago