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IrinaK [193]
4 years ago
9

3(x – 2) = 22 – x How many solutions exist for the equation?

Mathematics
2 answers:
Naily [24]4 years ago
7 0
3(x - 2) = 22 - x

First, we need to expand the problem (remove parentheses). The 3 outside will need to multiply into each term inside the parentheses. 
3x - 6 = 22 - x

Second, since our goal is to get the variable on one side by itself, we can start by adding 6 to each side. 
3x = 22 - x + 6

Third, now we need to simplify the right side of the problem. 22 - x + 6, don't look at the variable in between the 22 and 6, and just add those two numbers. This will allow the solution to 22 + 6 to be subtracted to x.
3x = 28 - x

Fourth, knowing that we have to get the variable (x) by itself on one side, we can continue by adding 'x' to both sides, which will flip the problem around.
3x + x = 28

Fifth, we can simplify 3x + x now. Basically, the variable by itself is considered a (1). So, now we can look at it as 3x + 1, which equals 4x.
4x = 28

Sixth, still focusing on the goal of getting the variable by itself, we can remove the 4 from the x by dividing both sides by 4. This will create a fraction.
x =  \frac{28}{4}

Seventh, ask yourself, what times 4 equals 28? Another way to look at 28/4 is (28 \div 4 , anyway you put it, your answer should be 7. Now we know that there is only one solution for this problem.
x = 7

Answer: \fbox {x = 7}
matrenka [14]4 years ago
3 0

Answer:

infinitely many

Step-by-step explanation:

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A football is kicked up into the air. Its height, H, above the ground, in meters, at t seconds can be modelled by () = 24 − 4.9^
MrRa [10]

Correct question is;

A football is kicked up into the air. Its height, H, above the ground, in meters, at t seconds can be modelled by () = 24 − 4.9²

(a) Determine the expression for the instantaneous rate of change in height at time t.

(b) Determine ' (2) What does ' (2) represent?

Answer:

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It means that at a distance of 2 m above the ground, the speed of the ball is 4.4 m/s

Step-by-step explanation:

We are given the function to represent the height as;

() = 24 − 4.9²

A) expression for the instantaneous rate of change in height at time t will be gotten by differentiation of the height function. Thus;

'() = 24 − 9.8

B) '(2) = 24 - 9.8(2)

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3 years ago
What is a common ratio
Umnica [9.8K]

A definition of a  common ration Is the number multiplied must be the same for each term in the sequence. The common ratio is the amount between each number in a geometric sequence. To determine the common ration you can just divide each number from the number preceding it in the sequence. Here is an example I found of a common ration to further help you

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viva [34]

Please read "Step-by-step" if you're having trouble

Answer:

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Step-by-step explanation:

Each side of the cookie dough is x long, since there is no given number, the diameter of the plate is also x, its as long as the square is wide, making the radius 1/2x.

The area of the cookie dough is x², the area of the plate is 1/4\pix².

You have the equation x²- \frac{1}{4}\pix²the equation has a Greatest Common Factor of x² so your factored equation is x²(1-\frac{1}{4}\pi)

8 0
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