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3 years ago

Find the sum. Correct answer gets brainliest.

Mathematics

2 answers:

Brrunno [24]3 years ago

5 0

2x^4 + 3x^2 + 7 + 3x^4 - 9x^2 - 4x + 4
= 5x^4 - 6x^2 - 4x + 11

answer is C. 5x^4 - 6x^2 - 4x + 11

sergij07 [2.7K]3 years ago

3 0

The answer is 5x^4-6x^2-4x+11, or in your case, C

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Human visual inspection of solder joints on printed circuit boards can be very subjective. Part of the problem stems from the nu

olga_2 [115]

Answer:

The probability that the selected joint was judged to be defective by neither of the two inspectors is $P(A' n B' ) = 0.8855$

The probability that the selected joint was judged to be defective by inspector B but not by inspector A is $P(A' n B) =0.0403$

Step-by-step explanation:

From the question we are told that

The sample size is $n_s = 10000$

The number of outcome for inspector A is $n__{A}} = 742$

The number of outcome for inspector B is $n__{B}} = 745$

The number of joints judged defective by both inspector is $n(A u B) = 1145$

The the probability that the selected joint was judged to be defective by neither of the two inspectors is mathematically represented as

$P(A' n B' ) = 1 - P(A u B)$

Now

$P(A\ u \ B) = \frac{n(Au B)}{n_s }$

substituting values

$P(A\ u \ B) = \frac{1145}{ 10 000 }$

$P(A' n B' ) = 1 - \frac{1145}{10 000}$

$P(A' n B' ) = 0.8855$

the probability that the selected joint was judged to be defective by inspector B but not by inspector A is mathematically represented as

$P(A' n B) = P(A \ u \ B) -P(A)$

Now

$P(A) = \frac{n__{A}}{n_s}$

substituting values

$P(A) = \frac{742}{10 000}$

$P(A' n B) = \frac{1145}{10 000} - \frac{742}{10 000}$

$P(A' n B) =0.0403$

7 0

4 years ago

Hi! Can someone please help me with this math problem? Please show your work on how you got your answer. Thank you!

SVEN [57.7K]

Answer:

5=p

Step-by-step explanation:

18=3.50+2.75P

18-3.50=2.75p

14.5/2.75=2.75p/2.75

5=p

she can buy 5 popcorn

5 0

3 years ago

I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?

SashulF [63]

Answer:

If x is my daughter's age now, my age now is 4x. So now my daughter is 10 years old, and I'm 40 years old, and in 20 years she'll be 30 and I'll be 60, twice as hers.

Step-by-step explanation:

6 0

3 years ago

Bob drew a line he thought was close to many of the points and found the equation of the line. He used the points (165, 168) and

ioda

We will see that the linear equation is:

y = 1.1*x -13.5

b) The predicted height is 164.7cm

<h3>How to get the linear equation?</h3>

A general linear equation is:

y = a*x + b

Where a is the slope and b is the y-intercept.

If we know that the line passes through (x₁, y₁) and (x₂, y₂), then we can write the slope as:

a = (y₂ - y₁)/(x₂ - x₁)

In this case, the line passes through (165, 168) and (174, 178), then the slope is:

a = (178 - 168)/(174 - 165) = 10/9 = 1.1

Then the line is:

y = 1.1*x + b

To get the value of b, we use one of the given points, for example if we use the first one (165, 168) we must have x = 165 and y = 168, replacing that we get:

168 = 1.1*165 + b

168 - 1.1*165 = b = -13.5

The equation is:

y = 1.1*x -13.5

Now we want to find the height of a person with an arm span of 162cm, then we replace x by 162 to get:

y = 1.1*162 -13.5 = 164.7

The predicted height is 164.7cm

If you want to learn more about linear equations, you can read:

brainly.com/question/1884491

8 0

3 years ago

HI how are u im good

jeka57 [31]

Answer:

I'm good too, I just finished all my homework (using Brainly ofc)

7 0

2 years ago

Read 2 more answers