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dalvyx [7]
2 years ago
13

The sum of 3 times a number and 7 is equal to 2. Turn into an equation

Mathematics
2 answers:
VashaNatasha [74]2 years ago
6 0
We know that 3 times a number and 7 equals 2. We can use x as a variable. 3x+7=2. 3x is how many times a number has to be plus seven to equal to 2.
sladkih [1.3K]2 years ago
4 0
3x+7=2 is the equation
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Y = ax + 4x - 2 is x= 1. What is the value of a?
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6 0
3 years ago
A restaurant has an electronic system that randomly selects customers when they pay for their meal to
polet [3.4K]

Using the binomial distribution, it is found that there is a 0.81 = 81% probability that NEITHER customer is selected to receive a coupon.

For each customer, there are only two possible outcomes, either they receive the coupon, or they do not. The probability of a customer receiving the coupon is independent of any other customer, which means that the binomial distribution is used to solve this question.

Binomial probability distribution

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.
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In this problem:

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The probability that <u>neither receives a coupon is P(X = 0)</u>, thus:

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

P(X = 0) = C_{2,0}.(0.1)^{0}.(0.9)^{2} = 0.81

0.81 = 81% probability that NEITHER customer is selected to receive a coupon.

A similar problem is given at brainly.com/question/25326823

7 0
3 years ago
EASY QUESTION AND I WILL GET U BRAINLIEST! Xd PLEASE HELPPPP
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Answer:

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8 0
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Step-by-step explanation:

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2 years ago
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The difference between the square of two numbers is 11. Twice the square of the first number increased by the square of the seco
jeyben [28]

Answer:

Below in bold.

Step-by-step explanation:

x^2 - y^2 = 11

2x^2  + y^2 = 97

From the first equation:

y^2 = x^2 - 11

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2x^2 + x^2 - 11 = 97

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x^2 = 36

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Substituting  for x in the first equation:

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y^2 = 36 - 11 = 25

y = 5, -5.

6 0
3 years ago
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