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Kamila [148]
4 years ago
5

Solve this quadratic function algebraically

Mathematics
1 answer:
Sonja [21]4 years ago
5 0

Answer:

Step-by-step explanation:

Please use " ^ " to denote exponentiation:  f(x)= 3x^2 - 6.

f(x)= 3x^2 - 6 can be factored (not solved) as follows:

f(x)= 3(x^ 2 -1) = 3(x - 1)(x + 1).

If you want a "solution," you must set f(x)= 3(x^ 2 -1) = 3(x - 1)(x + 1) = to 0 and solve the resulting equation for x:  x = 1 and x = -1.

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A sample of 25 cereal boxes of Granola Crunch, a generic brand of cereal, yields a mean (X¯) weight of 1.02 pounds. The goal is
Radda [10]

Answer:

1.01 < µ < 1.03

Step-by-step explanation:

We want to construct a 95% confidence interval.  Our sample size is 25, so we use a t-value.  The degrees of freedom are 24 (always one less than the sample size).  

The t-value we get is:  2.064

We have:

x = 1.02

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4 years ago
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3 years ago
Here is a rectangle labelled abcd the length of the rectangle is increased by10% and width 5% how much percent has the perimeter
xeze [42]

Answer:

8%

Step-by-step explanation:

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new width = 105% x 20 = 21cm

new perimeter = 2(33 + 21) = 108cm

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6 0
3 years ago
The sum of the interior angle measures of a polygon with n sides is 180 find n
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7 0
3 years ago
5. 40 = }(9x + 30) + 2
Anvisha [2.4K]

Answer:

x=-16

Step-by-step explanation:

We are given with the equation

40=-\frac{1}{3} \times (9x+30)+2

We are asked to solve it for x.

Distributing \frac{1}{3} over bracket and simplifying

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x=-16

7 0
3 years ago
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