1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
balu736 [363]
3 years ago
11

Given 2x² = -8, x is ____

Mathematics
2 answers:
IrinaVladis [17]3 years ago
5 0

Answer:

2x² = -8

x² = -4

The answer is no real solutions (x ∉ R) because a perfect square cannot be negative.

scZoUnD [109]3 years ago
3 0

Answer:

No real solutions, but there are complex solutions

x=2i and x = -2i.

Step-by-step explanation:

2x² = - 8

x² = - 4

x = +/- √(-4)= +/-√[(-1)*4] = +/-[√4 *√(-1)] = +/- [2*i]

x=2i and x = -2i

You might be interested in
-
kherson [118]

Answer:

$25.57

Step-by-step explanation:

First, you have to multiply $5.29 by 2 because she wants to spend $5.29 on 2 pairs of socks.

5.29 * 2 = $10.58

Then you want to add $10.58 and $14.99 together.

$10.58 + $14.99 = $25.57

3 0
3 years ago
A bag contains 3 red marbles. The ratio of red marbles to blue marbles is 3 : 7. Find the number of blue marbles in the bag.
Phoenix [80]

Answer:

7 blue marbles

Step-by-step explanation:

because 3:7 equals red:blue so blue = 7

4 0
3 years ago
Read 2 more answers
Point A lies on the circle and has an x-coordinate of 1..
Neko [114]

Answer:

the last one

Step-by-step explanation:

because the distance/length formula is applied here so you just need to rearrange the coordinates in to the formula

6 0
2 years ago
a certain number of two digit is three times the sum of its digit and if 45 added to it the digit will be reversed find the numb
bogdanovich [222]
· Author has 184 answers and 67.6K answer views
Let the number be (10 x + y)

Then, 10 x + y = 3 * (x + y) (given)

Or, 10 x + y = 3 x + 3 y

Or, 10 x - 3 x = 3 y - y

Or, 7x = 2 y

Or, x = 2 y / 7 ( Eq. 1)

Also, 10 x + y + 45 = 10 y + x ( given)

Or, 10 x - x = 10 y - y - 45

Or, 9 x = 9 y - 45 ( Eq. 2)

Substituting the value of x from (Eq. 1) in (Eq. 2), we have:

9 * 2 y / 7 = 9 y - 45

Or, (9 y ) - (18 y / 7) = 45

Or, 63 y - 18 y = 315

Or, 45 y = 315

Or, y = 7

From (Eq. 1),

x = 2 * 7 / 7 = 2

So, the number is 10 x + y = (10 * 2) + 7 = (20 + 7) = 27

Answer

Check:

Sum of the digits = 2 + 7 = 9

9 * 3 = 27 ✓

Adding 45 to the number 27, we get 72. So, the digits get reversed.
5 0
3 years ago
Which expression is equal to 16.25 ÷ 2.5?
kirza4 [7]
6.5 is the answer to your question
6 0
3 years ago
Other questions:
  • 2x - 4y = 12 <br> 3x - 5y = 20
    15·1 answer
  • If a sample of 99 bowlers were taken from a population of 466 bowlers,x could refer to the mean of how many bowlers scores
    11·1 answer
  • In ΔIJK, the measure of ∠K=90°, the measure of ∠J=76°, and JK = 3.6 feet. Find the length of IJ to the nearest tenth of a foot.
    5·1 answer
  • Share ?747 in the ratio 2:7 between tom and Ben. How many will both of them get
    6·1 answer
  • The cost of 4 cartons of fresh cream is $5.76. What is the cost of 13 such cartons? $16.25 $18.72 $18.76 $36.04
    15·1 answer
  • Please answer I will make you Brainliest if it's right
    7·2 answers
  • Estimate at 15% tip on a dinner bill of $39.84 by first rounding the bill amount to the nearest $10
    7·1 answer
  • Solving for the missing side of the triangle , please help
    11·1 answer
  • 10.Admission to the Carnival is $4. Each game played costs an additional $2.
    6·2 answers
  • UNICORN A IS 15 TIMES OLDER THAN
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!