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3 years ago

Given 2x2 = -8, x is

Mathematics

1 answer:

Diano4ka-milaya [45]3 years ago

4 0

Answer:

The answer is x = 2 or x = -2

Step-by-step explanation:

2x² = - 8

Send 8 to the left side of the equation

That is

2x² - 8 = 0

Simplify the expression

Divide both terms by 2

That's

2x² /2 - 8 /2 = 0

x² - 4 = 0

Factorize the expression

that's

(x +2) (x - 2) = 0

x + 2 = 0 x -2 =0

x = -2 x = 2

Therefore x = 2 or x = -2

Hope this helps you

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Two more than a number

schepotkina [342]

X+2 Hope this helps!

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2 years ago

Read 2 more answers

Solve the inequality:-3x-4/7 >5

Aliun [14]

x < - $\frac{13}{7}$

add $\frac{4}{7}$ to both sides

- 3x > $\frac{4}{7}$ + $\frac{35}{7}$

- 3x > $\frac{39}{7}$ ( divide both sides by - 3 )

note that when we divide/ multiply by a negative quantity we must reverse the inequality symbol

x < - $\frac{13}{7}$

6 0

3 years ago

Select the correct answer. robin randomly selects a number between 1 and 20. what is the probability that the number selected is

Vlada [557]

The probability that the number selected is the square of a natural number will be $\frac{1}{5}$ .

<h3 /><h3>What is probability?</h3>

Probability means possibility. It deals with the occurrence of a random event. The value of probability can only be from 0 to 1.

Its basic meaning is something is likely to happen. It is the ratio of the favorable event to the total number of events.

P is the probability

F(E) is the favorable event

T(E)is the total event

The probability is found as;

$\rm P = \frac{F(E)}{T(E)} \\\\ \rm P = \frac{4}{20)} \\\\ \rm P = \frac{1}{5}$

Hence the probability that the number selected is the square of a natural number will be $\frac{1}{5}$ .

To learn more about the probability link is given below.

brainly.com/question/795909

8 0

2 years ago

Write the equation of the line, given the y and x-intercepts.

Dimas [21]

Answer:

y = -(2/3)m - 2

Step-by-step explanation:

recall that the general equation of a straight line in slope-intercept form is

y = mx + b

where, m is the slope and b is the y - intercept

here we are given that the y - intercept is -2, hence the equation becomes:

y = mx + (-2)

y = mx -2

we are also given that the x-intercept is -3, which means that when y = 0, x = -3 (simply substitute this into our new equation to solve for m)

0 = m(-3) -2

0 = -3m - 2 (add 3m to both sides)

3m = -2 (divide both sides by 3)

m = -(2/3)

hence our equation is now

y = -(2/3)m - 2

5 0

3 years ago

Hello can you please help me posted picture of question

zhuklara [117]

Since the order of selection does not matter, we will use combinations to solve this problem.

We are to form the combination of 30 objects taken 6 at a time. This can be expressed as 30C6.

$30C6= \frac{30!}{6!*24!} \\ \\ 
= 593775$

This means the six teachers can be selected in 593775 ways.

So the correct answer is option A

3 0

3 years ago