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Alex_Xolod [135]
3 years ago
15

What is the value of x in the equation 4 x plus 8 y equals 40, when y equals 0. 8? 4. 6 8. 4 10 12.

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
3 0

Answer:

x = 8.4

Step-by-step explanation:

8 times 0.8 is 6.4, then 40 - 6.4 is 33.6, and 33.6 divided by 4 is 8.4

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There are 20 machines in a factory. 7 of the machines are defective.
adelina 88 [10]

Answer:

0.1225

Step-by-step explanation:

Given

Number of Machines = 20

Defective Machines = 7

Required

Probability that two selected (with replacement) are defective.

The first step is to define an event that a machine will be defective.

Let M represent the selected machine sis defective.

P(M) = 7/20

Provided that the two selected machines are replaced;

The probability is calculated as thus

P(Both) = P(First Defect) * P(Second Defect)

From tge question, we understand that each selection is replaced before another selection is made.

This means that the probability of first selection and the probability of second selection are independent.

And as such;

P(First Defect) = P (Second Defect) = P(M) = 7/20

So;

P(Both) = P(First Defect) * P(Second Defect)

PBoth) = 7/20 * 7/20

P(Both) = 49/400

P(Both) = 0.1225

Hence, the probability that both choices will be defective machines is 0.1225

4 0
3 years ago
What is the equivalent ratio of 26:7​
anastassius [24]

Answer:

52 : 14

Step-by-step explanation:

multiply the numbers by 2

3 0
2 years ago
What would be the answer to 8x^6/ 8x^5 =?
Lubov Fominskaja [6]
In dividing two equation with variables and exponent, First you must align or rearrange the equation and group them base on their variables but don't forget the sign of each variables. Second, proceed in dividing its quantity and then subtract its exponent to the other variables having the same. So by calculating it, the answer would be  X or X^1 
3 0
3 years ago
A spinner is used for which it is equally probable that the pointer will land on any one of six regions. Three of the regions ar
34kurt

Answer:

The probability it will land on green every time is \frac{1}{27}.

Step-by-step explanation:

We are given that a spinner is used for which it is equally probable that the pointer will land on any one of six regions. Three of the regions are colored red, two are colored green, and one is colored yellow.

The pointer is spun three times.

<u>As we know that the probability of an event is described as;</u>

  Probability of an event =  \frac{\text{Favorable number of outcomes}}{\text{Total number of outcomes}}

Here, the favorable outcome is that the spinner will land on green every time.

So, the number of green regions = 2

Total number of regions = 3(red) + 2(green) + 1(yellow) = 6 regions

<em>Now, the probability it will land on green every time is given by;</em>

        Probability =  \frac{2}{6}\times \frac{2}{6}\times \frac{2}{6}

                           =  \frac{1}{3}\times \frac{1}{3}\times \frac{1}{3}

                           =  \frac{1}{27}

Hence, the probability it will land on green every time is \frac{1}{27}.

4 0
2 years ago
A man purchased a magazine at the airport for $ 2.79 .
Sladkaya [172]
23% is the answer i believe
7 0
2 years ago
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