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pychu [463]
3 years ago
9

Given the function rule f(x)=x2-4x+3 what is the output of f(-3)

Mathematics
1 answer:
Mariana [72]3 years ago
3 0
(-3)^2 -4(-3) + 3

9 + 12 + 3

So the answer is 24
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Write the expression 5x+2x^2-7+2x^3
avanturin [10]

2x^3+2x^2+5x-7, That would be the answer.

3 0
3 years ago
Write the equation of the line that passes<br> through the points (-7,-9) and (-3,-1)
zysi [14]

Answer:

2x + 5

Step-by-step explanation:

I am assuming you are talking about a linear function. If it is, then the equation would be:

2x + 5.

Hope this helps!

3 0
3 years ago
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Tourists covered 640 km for a 4 hour ride by car and a 7 hour ride by train. What is the speed of the train, if it is 5 km/h gre
gavmur [86]

Answer:

60 km/h

Step-by-step explanation:

Let us use the x to represent the speed of the car since it is the smaller value.

Then, the distance covered by the car is 4x since was going 4 kph.

The distance covered by the train is (x+5) times 7 or 7x+35.

We know that the total distance covered is 640 km.

Using this information, we can set up the equation 4x+7x+35=640.

By subtracting both sides by 35 and combining the x's, we get a new equation of 11x=605.

After this, we divide both sides by 11 and get x=55.

Lastly, we add 5 to 55 since the train is 5 km faster than the car and that x stood for the car.

Train=60 km/h

5 0
3 years ago
A test has 10 true/false questions. How many different tests can be turned in to the teacher?
Flauer [41]
The same as the greatest number that can be written
with 10 binary bits:  <u>1,024</u>
3 0
3 years ago
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A line passes through the points (1, –6) and (4, 3).
Marina CMI [18]

Answer:

y = 3x - 9

Step-by-step explanation:

We first need to find the slope (m)

m = \frac{y_2-y_1}{x_2-x_1} = \frac{3 - (-6)}{4-1} = \frac{9}{3} = 3

y = mx + b

y = 3x + b

(4, 3)

y = 3x + b

3 = 3(4) + b

3 = 12 + b

-12  -12

-9 = b

(1, –6)

y = 3x + b

-6 = 3(1) + b

-6 = 3 + b

-3   -3

-9 = b

y = 3x - 9

To check:  (1, –6)

y = 3x - 9

-6 = 3(1) - 9

-6 = 3 - 9

-6 = -6

Hope this helps!

6 0
2 years ago
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