2 years ago

Solve u^2 = -4, where u is a real number. Simplify your answer as much as possible.

Mathematics

1 answer:

alexdok [17]2 years ago

8 0

Answer:

2i and -2i

Step-by-step explanation:

I'll change u to x to be easier to understand.

x^2 = -4

sqrt(x^2) = sqrt(-4)

sqrt(-4) = 2i, or -2i

You might be interested in

Is 3 yards bigger than 21 feet is 21 feet bigger than 3 yards

Kipish [7]

No because 21 ft equals 7 yd
which us bigger than 3 yd

6 0

3 years ago

Read 2 more answers

Industry standards suggest that 8 percent of new vehicles require warranty service within the first year. Jones Nissan in Sumter

jenyasd209 [6]

Answer:

Step-by-step explanation:

Let X be the no of vehicles that require warranty service within I year out of vehicles sold (9) yesterday.

Each vehicle is independent of the other to get warranty service

Hence X is binomial with p=8% = 0.08

So P(X=x) = $9Cx (0.08)^x (1-0.08)^{9-x} ,x=0,1,2...9$

$a) P(X=0) = 0.472161\\b) P(x=1) = 0.3695$

c) $P(X=2) = 0.1285$

d) Mean = Mean of binomial = np =

$9(0.08) = 0.72$

Var (x) = npq = $0.6624$

Std dev = square root of variance = 0.8139

5 0

3 years ago

Read 2 more answers

Olivia ordered 24 cupcakes and a layer cake costs 16$ and the total cost of the order was 52$ what was the price of each cupcake

Tju [1.3M]

Let x be the price of a cupcake. There are 24 cupcakes so it will be 24x. Solution: 24x+16=52 24x=52-16 24x=36 Divide both sides by 24 X=1.5. The price of each cupcake is 1.5$

8 0

3 years ago

Once again... we almost finish, solve for x

algol13

Answer:

x = 34

Step-by-step explanation:

Angles are supplementary:

x + 7 + 4x + 3 = 180

5x + 10 = 180

5x = 170

x = 34

3 0

2 years ago

The ratio of bass to catfish in the pond is 54 to 150. Which statement describes this relationship? A) There are 6 basses for ev

loris [4]

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers