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Nadya [2.5K]
3 years ago
10

What is the square root of -1?

Mathematics
2 answers:
lys-0071 [83]3 years ago
7 0

Answer:

i

Step-by-step explanation:

<u>Step 1:  Find the square root of -1</u>

<u />\sqrt{-1}

\sqrt{i^2}

i

Answer:  i

katovenus [111]3 years ago
7 0
The square root of -1 is i
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Ms. Franco has 64 pencils and 48
Arada [10]

Answer:

16

Step-by-step explanation:

64=1,2,4,8,<u>16</u>,32,64

48=1,2,3,4,6,8,12,<u>16</u>,24,48

6 0
3 years ago
if a customer receives 15% off a shirt that cost $20 and has to pay 6% sales tax. How much did the customer pay?​
nlexa [21]

The answer is A. 18.02

if you do 20 - 15% = 17  17 + 6% = 18.02

8 0
3 years ago
Type the correct answer in the box use/ for the fraction bar
Zarrin [17]

Answer:

see explanation

Step-by-step explanation:

given the 2 equations

y = x² - 2x - 19 → (1)

y + 4x = 5 → (2)

substitute y = x² - 2x - 19 into (2)

x² - 2x - 19 + 4x = 5 ( subtract 5 from both sides )

x² + 2x - 24 = 0 ← in standard form

(x + 6)(x - 4) = 0 ← in factored form

equate each factor to zero and solve for x

x + 6 = 0 ⇒ x = - 6

x - 4 = 0 ⇒ x = 4

substitute each value of x into (1) for corresponding y- coordinate

x = - 6 : y = (- 6)² - 2(- 6) - 19 = 36 + 12 - 19 = 29 ⇒ (- 6, 29)

x = 4 : y = 4² - 2(4) - 19 = 16 - 8 - 19 = - 11 ⇒ (4, - 11)

the solutions are (- 6, 29), (4, - 11)


6 0
3 years ago
6(a)If the gradient of the straight line
tensa zangetsu [6.8K]

Answer:

(i) k =1

(ii) y-intercept is 7

Step-by-step explanation:

<u>Given line:</u>

  • ky = kx + x + 7

<u>Divide all terms by k to get slope-intercept form of the line</u>

  • y = (1 + 1/k)x + 7/k

<u>Since the gradient (slope) of the line is 2:</u>

  • 1 + 1/k = 2
  • 1/k = 1
  • k = 1

<u>The equation is now:</u>

  • y = 2x + 7

<u>y - intercept is found when x = 0</u>

  • x = 0 ⇒
  • y = 2*0 + 7
  • y = 7

5 0
3 years ago
Explain why the image of a figure after a translation is congruent to its preimage.
hjlf

Answer: The size and shape will only change when the transformation being made to the figure is a dilation. Since it is only being translated, its image and preimage are still congruent in size.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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