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Licemer1 [7]
3 years ago
11

2. Order the group of parabolas from widest to narrowest

Mathematics
2 answers:
kap26 [50]3 years ago
8 0
2. 3/2x²
    -1/2x²
    1/4x²
5. -4x²-5 moves in 5 up on the y axis
6. I'm cant remember the trick to this one
7. This one should be D.
Hope This Helps!
denis23 [38]3 years ago
4 0

Answer:

2. y=\frac{3}{4}x^{2}

5. y = -4x² shifted 5 units downwards.

6. Option C. c = 49

7. Option D. quadratic; y = 0.79x² + 100

Step-by-step explanation:

2. In a given quadratic equation of parabola y = ax² + bx + c, higher the coefficient of x² that is a, narrower will be the parabola.

Therefore, out of three equations of parabola y=\frac{3}{4}x^{2} will be the narrowest.

5. Graph y = -4x² is passing through origin (0, 0). Now this graph has been shifted 5 units downwards to create a transformed form of y = - 4x² - 5.

6. The given trinomial is (x² + 14x + c). We have to find the value of c for which his trinomial becomes a perfect square.

x² + 14x + c = x² + 2(7)x + c

= x² + 2(7)x + 49

= (x + 7)² [ since (a + b)² = a² + 2ab + b². Here a = x and b = 7 ]

Therefore, c = 49 is the answer.

7. We have to find the type of function which models the data given in the table.

For Linear function.

There should be common difference in the y - values.

79 - 100 = -21

62 - 79 = -17

49 - 62 = -13

Since there is no common difference so data don't represent the linear function.

For quadratic equation.

Difference of difference values of y should be same.

As we have calculated above

Difference of the terms given in the table are -21, -17 and -13

So difference of difference will be

-21 - (-17) = -4

(-17) - (-13) = -4

Finally we find that difference of difference is same as (-4).

Therefore, equation that models the data is QUADRATIC.

y = 0.79x² + 100 [since at x = 0, value of y = 100, so y - intercept is 100]

You might be interested in
How do you use a strategy of 30%of 900?
Julli [10]

Answer: 2 7 0

Step-by-step explanation:

1. We assume, that the number 900 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 900 is 100%, so we can write it down as 900=100%.

4. We know, that x is 30% of the output value, so we can write it down as x=30%.

5. Now we have two simple equations:

1) 900=100%

2) x=30%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

900/x=100%/30%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 30% of 900

900/x=100/30

(900/x)*x=(100/30)*x       - we multiply both sides of the equation by x

900=3.33333333333*x       - we divide both sides of the equation by (3.33333333333) to get x

900/3.33333333333=x

270=x

x=270

now we have:

30% of 900=270

3 0
3 years ago
Maria's math test had 25 questions. She got 84% correct. How many problems did she get wrong?
Art [367]
She got 4 problems incorrect
4 0
3 years ago
What is the answer??
Dmitriy789 [7]

Answer:

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Step-by-step explanation:

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8 0
2 years ago
0.002347 written to three significant figures is
BARSIC [14]

Answer:0.00234

Step-by-step explanation:

5 0
2 years ago
Identify the domain of the graph of y = −x2 − 6x − 13. all real numbers x ≤ −4 x ≥ −6 x ≥ −2
BlackZzzverrR [31]
The function is y = -x^2 - 6x - 13.

The domain is the set of x-values for which the funcion is defined.

In this case, y is defined for all the real numbers.

Answer: all real numbers.
7 0
2 years ago
Read 2 more answers
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