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3 years ago

Multiply (2x+9) (x+3)

Mathematics

2 answers:

postnew [5]3 years ago

7 0

Here you distrubute the two equations

2x*x=2x^2
2x*3=6x
9*x=9x
9*3=27

Then we add all these answers together for the total
2x^2+6x+9x+27 (combine like terms)
2x^2+15x+27 in the final answer

Hope this helps

svlad2 [7]3 years ago

3 0

Theres this method I use called the box method.

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3 years ago

Heather cut 2 feet of tape. How much is this in inches?

zheka24 [161]

Answer: 24 inches.

Step-by-step explanation: since theres 12 inches in a foot, and 2 feet altogether, you would multiply 12x2.

6 0

3 years ago

The probability that a car has a certain factory defect is 825. The probability that a car has a certain factory defect and need

ipn [44]

Answer:

90.91% probability that a car needs an oil change given that it has a certain factory defect

Step-by-step explanation:

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 problem, we have that:

Event A: having a factory defect.

Event B: needing an oil change.

The probability that a car has a certain factory defect is 825.

So $P(A) = 0.825$

The probability that a car has a certain factory defect and needs an oil change is 750.

So $P(A \cap B) = 0.75$

What is the probability that a car needs an oil change given that it has a certain factory defect

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.75}{0.825} = 0.9091$

90.91% probability that a car needs an oil change given that it has a certain factory defect

5 0

4 years ago

What is the slope of the line ?

Svetradugi [14.3K]

Slope of a line

m = \frac{\text{rise}}{\text{run}} = \frac{y_2 - y_1}{x_2 - x_1}

m = slope

(x_1, y_1) = coordinates of first point in the line

(x_2, y_2) = coordinates of second point in the line

How do I find the slope of the line?

The slope equals the rise divided by the run: . You can determine the slope of a line from its graph by looking at the rise and run. One characteristic of a line is that its slope is constant all the way along it. So, you can choose any 2 points along the graph of the line to figure out the slope.

4 0

4 years ago

75% of what equals 225?<br> What did you get for 10%, 20% , 30% , 40%, 50% ,60% and 70%?

Lesechka [4]

75% of 225 = 300.

10% = 30
20% = 60
30% = 90
40% = 120
50% = 150
60% = 180
70% = 210
80% = 240
90% = 270
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8 0

3 years ago