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Phantasy [73]
3 years ago
12

Which of the following is not a real number?

Mathematics
2 answers:
givi [52]3 years ago
7 0

Answer:

im pretty sure its the -3 one

Step-by-step explanation:

FinnZ [79.3K]3 years ago
7 0

Answer:

The answer is A, Square root of -3 is not a real number.

Step-by-step explanation: You can take the square root of positive numbers, so we can eliminate choices C and D. We can take the square root of 0, which would equal 0, so B is incorrect. However, We cannot take the square root of negative numbers, so choice A is the answer for this question.

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Need help asap please
iVinArrow [24]

Answer:

see below

Step-by-step explanation:

The car will have some value.  It will not decrease to nothing

We take 1/3 away from the value each year

This means we keep 2/3 of the value

Year 0      value 18000

Year 1       value  18000 *2/3

Year 2      value  18000 * 2/3 * 2/3

Year 3     value   18000 * 2/3 * 2/3 * 2/3

Year 6      value   18000 * 2/3 * 2/3 * 2/3* 2/3 * 2/3 * 2/3

                  value   18000 * 2/3 ^6

Year t       value = 18000 * 2/3 ^ t

v = 18000 * 2/3 ^t

3 0
3 years ago
Wakaba buys some granola bars at $0.50 each and energy drinks at $2 each for a group hike. She buys twice as many granola bars a
Kazeer [188]

Answer: 9 energy drinks and 18 granola bars.

Step-by-step explanation:

Price per granola bar = $0.50

Price per energy drink = $2.

We can define G as the number of granola bars that she bought, and D as the number of drinks that she bought.

Then

"She buys twice as many granola bars as energy drinks."

G = 2*D

" If she spends $27 in total"

G*$0.50 + D*$2 = $27

So we have a system of equations:

G = 2*D

G*$0.50 + D*$2 = $27

The first step will be to replace the first equation into the second one, and solve it for D.

(2D)*$0.50 + D*$2 = $27

D*(2*$0.50) + D*$2 = $27

D*$1 + D*$2 = $27

D*$3 = $27

D = $27/$3 = 9.

So she bought 9 energy drinks, and we know that:

G = 2*D

G = 2*9 = 18

She bought 18 granola bars.

5 0
3 years ago
. A car bought for $20,000. Its value depreciates by 10% each year for 3 years. What is the car's worth after3 years?
Mila [183]

Answer:

$14,580

Step-by-step explanation:

To start off, 10% of 20,000-one easy way to do this is to multiply 20,000 by 0.1, which is 10% in decimal form

-In doing that, you get 2,000

-Now the question says that the value is depreciated which means it goes down in value, so subtract 2,000 from 20,000 to 18,000

-the value of the car after one year is now $18,000

Now, let's move to the second year.  This time find 10% of 18,000

-multiply 18,000 by 0.1 to get 1,800

-since the value is depreciating, or becoming less, we will subtract 1,800 from 18,000 to get 16,200

-the value of the car after two years is now $16,200

Finally, let's look at the value of the car after three years.  Only this time, we will now find 10% of 16,200

-multiply 16,200 by 0.1 to get 1,620

-since value is being depreciated, or lessened, we will once again be subtracting.  Subtract 1,620 from 16,200 to get 14,580

Therefore, the value of the car after three years is now $14,580.

4 0
3 years ago
How to factor the. problem completely
den301095 [7]
The correct answer is d
6 0
3 years ago
HELP! PLZ I need to show work too . <br><br><br> -12.5 - (-12)
Mila [183]

Answer:

-0.5

Step-by-step explanation:

-12.5 - (-12) = -12.5 + 12 (because you distribute the minus sign). Then, when adding you get - 0.5

4 0
3 years ago
Read 2 more answers
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