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3 years ago

What about this one ?

Mathematics

2 answers:

Mazyrski [523]3 years ago

7 0

Download Photomath bro save my life

il63 [147K]3 years ago

6 0

For this case we have the following equation:
x ^ 2 + 18x + 32 = 0
Rewriting we have:
x ^ 2 + 18x = -32
By completing squares we have:
x ^ 2 + 18x + (18/2) ^ 2 = -32 + (18/2) ^ 2
Rewriting:
x ^ 2 + 18x + (9) ^ 2 = -32 + (9) ^ 2
x ^ 2 + 18x + 81 = -32 + 81
x ^ 2 + 18x + 81 = 49
(x + 9) ^ 2 = 49
Answer:
(x + 9) ^ 2 = 49
option 1

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3 years ago

Age If you add Natalie's age and Fred's age, the result is 43. If you add Fred's age to 4 times

Len [333]

Let’s take fred age as x and Natalie’s age as y.
So,
A/Q
X + Y = 43. Let it be eqution 1
and
X + 4Y = 79. Let it be equation 2

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3 years ago

The owner of a small deli is trying to decide whether to discontinue selling magazines. He suspects that only 7% of his customer

Mrrafil [7]

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<h3>What is the binomial distribution formula?</h3>

The formula is:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$C_{n,x} = \frac{n!}{x!(n-x)!}$

The parameters are:

x is the number of successes.

n is the number of trials.

p is the probability of a success on a single trial.

In this problem:

7% of his customers buy a magazine, hence p = 0.07.

A sample of 14 customers is taken, hence n = 14.

The probability that exactly 4 out of the first 14 customers buy a magazine is P(X = 4), hence:

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 4) = C_{14,4}.(0.07)^{4}.(0.93)^{10} = 0.0116$

0.0116 = 1.16% probability that exactly 4 out of the first 14 customers buy a magazine.

More can be learned about the binomial distribution at brainly.com/question/24863377

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3 years ago