All categories

4 years ago

Can some one help me.

Mathematics

2 answers:

Amanda [17]4 years ago

4 0

Answer:

Step-by-step explanation:

2²×2

4×2

8 is the answer

saveliy_v [14]4 years ago

3 0

Answer:

k2j

j=2,k=2

(2)2×(2)

4×2

You might be interested in

Easy question!!

Xelga [282]

Answer:

136 ft^2

Step-by-step explanation:

Surface area = 2 [ (l*w) + (l*h) + (w*h) ]

= 2 [ (8*3) + (8*4) + (4*3) ]

= 136 ft^2

4 0

3 years ago

How can you use geometry figures to solve real world problems

Otrada [13]

Bob has to tile a rectangular floor that is 10 by 20 feet
he has tiles with tiles that are 1 foot square
how many tiles does he need
area=legnth times wdith=10 times 20=200
200 square feet=200 tiles

4 0

3 years ago

An electronic system has each of two different types of components in joint operation. Let X and Y denote the lengths of life, i

AURORKA [14]

Answer:

The average cost is $E(C) = 66$

The standard deviation of cost is $\sigma = 9.798$

Step-by-step explanation:

From the question we are told that

$E(X) = 4$

$E(Y) = 2$

$E(X^2) = 24$

$E(Y^2) = 8$

The cost of replacing the two component is C = 50 + 2 X + 4 Y

The variance of X is mathematically represented as

V(X) = $E(X^2) - [E(X)]^2$

Substituting values

$V[X] = 24 - 4^2$

$V[X] =8$

The variance of Y is mathematically represented as

V(Y) = $E(Y^2) - [E(Y)]^2$

Substituting values

$V[Y] = 8 - 2^2$

$V[X] =4$

The average of replacing the two component is

$E(C) = 2 * E(X) + 4* E(Y)$

substituting value

$E(C) = 50 + 2 * (4) + 4* (2)$

$E(C) = 66$

The variance of replacing the two component is

$V(C) = V(50 + 2X +4Y)$ Note: The variance of constant is zero

and X and Y are independent

=> $V(C) = 2^2 * V(X) + 4^2 * V(Y)$

substituting values

=> $V(C) = 4 * 8 + 16 * 4$

=> $V(C) = 32 + 64$

=> $V(C) = 96$

The standard deviation is

$\sigma = \sqrt{V(C)}$

substituting values

$\sigma = \sqrt{96}$

$\sigma = 9.798$

6 0

3 years ago

if the ratio of pepperonis to a slice of pizza is 4 per slice, then how many pepperonis would be on an eight slice pizza?

allochka39001 [22]

Answer:

Step-by-step explanation:

The answer is 8 * 4 = 32.

6 0

3 years ago

Read 2 more answers

X2 + 14x + 7 = 9x + 3<br> x =<br> or x =

Vinvika [58]

Answer:

x= -1 or x= -4

Step-by-step explanation:

5 0

3 years ago

Can some one help me.​

Can some one help me.