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Natasha2012 [34]
3 years ago
13

Solving these quadratics for x using complete the square 3x^2-4x-1=0

Mathematics
1 answer:
ZanzabumX [31]3 years ago
5 0

Answer:

in picture

Step-by-step explanation:

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What is the closed linear form of the sequence of the negative even integers starting with -2?
Snowcat [4.5K]
Hello,


n=1,2,3,.... and not 0

Answer B a(n)=-2*n

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4 years ago
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I cant figure out if its + or ×​
uranmaximum [27]

Answer:

+

Step-by-step explanation:

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3 years ago
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At a basketball game, an air cannon launches T-shirts into the crowd. The function y=−1/8x^2 + 4x represents the path of a T-shi
Juliette [100K]

Answer:

The T-shirt lands in the bleachers at a height of 14 feet.

Step-by-step explanation:

The point where they meet is the solution of the simultaneous system of equations:

y = -\frac{1}{8}x^2+4x...........................................(1)

3y = 2x - 14..............................................(2)

From (2),

y = \frac{2}{3}x-\frac{14}{3}.................................................(3)

Substituting (3) in (1),

\frac{2}{3}x-\frac{14}{3} =  -\frac{1}{8}x^2+4x

Multiply through by 24 (the LCM of 3 and 8, the denominators of the fractions)

(24\times\frac{2}{3}x)-(24\times\frac{14}{3}) =  (-24\times \frac{1}{8}x^2)+(24\times4x)

16x - 112 = -3x^2+96x

3x^2-80x -112 = 0

(x-28)(3x+4) = 0

x-28 = 0                 OR        3x+4=0

x=28                       OR        x = -\frac{4}{3}

The value of <em>y</em> represents the height.

Substituting for <em>x</em> in (3)

y = \frac{2}{3}\times28-\frac{14}{3} = \frac{56}{3} - \frac{14}{3} = 14

y = \frac{2}{3}\times(-\frac{4}{3})-\frac{14}{3} = -\frac{8}{9} - \frac{14}{3} = -\frac{50}{9}

We discard the negative answer.

Hence, the T-shirt lands in the bleachers at a height of 14 feet.

6 0
3 years ago
Evaluate the expression for b = 5 <br><br>4b^2​
Alex17521 [72]

Answer: 100

Step-by-step explanation:

Sub in 5 for b in the expression

4b^2\\4(5)^2

You must do the exponent first as it comes before multiplication in the order of operations

4(5)^2\\4(25)

Now multiply

4(25)\\100

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Answer:

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Step-by-step explanation:

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