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jek_recluse [69]

3 years ago

8

These are questions 2-5 out of 20. are these correct!?

1 answer:

dusya [7]3 years ago

3 0

I believe so, but It is kind of blurry for some reason on my screen but from what I can make out yes.

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PLEASE ANSWER FAST WILL GIVE BRAINLIEST

GrogVix [38]

Answer:b

Step-by-step explanation:

6 0

3 years ago

What is the Value of x when x + 10=4?

Kisachek [45]

Answer:

-6

Step-by-step explanation

x+10=4

x=4-10

x=-6

5 0

3 years ago

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

10x - 80 = 16x - 12 <br> what is x?

AnnyKZ [126]

I just did it on paper but hope that helps:)

7 0

2 years ago

(3xy2)3 simplified im not sure how to do this

Naddika [18.5K]

The answer is 9xy^2

7 0

3 years ago