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3 years ago

Rewrite the equation by completing the square. X^2-14x+40=0

Mathematics

1 answer:

OLga [1]3 years ago

4 0

Answer:

(x – 7)² – 9

Step-by-step explanation:

I hope this helps

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I need help can you help me pls

dedylja [7]

Answer:

1 and 3

Step-by-step explanation:

They are across from each other making them vertical angles.

4 0

3 years ago

the sum of four times a number and eight is between zero and twelve. find the range of numbers. write a compound inequality.

Masja [62]

Let the number be the variable x

4 times the number is 4x

the sum of 8 and 4 times a number is 28

4x+8=28

4x=28-8

4x=20

x=20/4

x=5

6 0

3 years ago

The scale factor of two similar solids is 3:7. What is the ratio of their corresponding volumes?

MAVERICK [17]

Note, if you have a linear scale, then the surface will be the square othis scale & the volume will be the cube of the linear.

Our linear scale is 3/7. then the ration of their corresponding bvolume is:

3³/7³ = 27/343

3 0

3 years ago

Which lines are parallel? Check all that apply.

Marat540 [252]

Answer:

I think it's A and C

b║f

c║e

(I'm so sorry if it's wrong)

Hope this Helps!

8 0

3 years ago

Read 2 more answers

Seventy-five percent of the light aircraft that disappear while in flight in a certain country are subsequently discovered. Of t

Elanso [62]

Answer:

0.05 = 5% probability that it will not be discovered

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Has an emergency locator

Event B: Not discovered

Probability of having an emergency locator:

70% of 75%(discovered).

100 - 89 = 11% of 100 - 75 = 25%(not discovered). So

$P(A) = 0.7*0.75 + 0.11*0.25 = 0.5525$

Intersection of events A and B

Having an emergency locator and not discovered, so 11% of 25%

$P(A \cap B) = 0.11*0.25 = 0.0275$

What is the probability that it will not be discovered?

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.0275}{0.5525} = 0.05$

0.05 = 5% probability that it will not be discovered

5 0

3 years ago