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3 years ago

Factor the polynomial below.

Mathematics

2 answers:

Ann [662]3 years ago

7 0

Answer:

The answer is: B. 4(x+2)(x-2)

Step-by-step explanation:

Just had this on a test, got it right!

Nonamiya [84]3 years ago

3 0

I think the answer is D that what i think

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A car travels 255 miles in 3 3/4 at a constant speed. How many miles is the car traveling per hour?

disa [49]

Answer:

eighty thousand one hundred and seventy

4 0

3 years ago

Dida bought a scratch ticket for $2.00. The potential payoffs and probability of those payoffs are shown below.

kakasveta [241]

9514 1404 393

Answer:

(b) $1.15

Step-by-step explanation:

The expected value is the sum of products of payoff and probability:

$0×0.15 +0.50×0.5 +1.0×0.2 +2.0×0.1 +10×0.05

= $0 +0.25 +0.20 +0.20 +0.50

= $1.15 . . . . expected value of the scratch ticket

4 0

3 years ago

Find the zeros of y = x2 – 6x – 4 by completing the square.

katrin [286]

Answer:

The solutions to the quadratic equations are:

$x=\sqrt{13}+3,\:x=-\sqrt{13}+3$

Step-by-step explanation:

Given the function

$y\:=\:x^2\:-\:6x\:-\:4$

substitute y = 0 in the equation to determine the zeros

$0\:=\:x^2\:-\:6x\:-\:4$

Switch sides

$x^2-6x-4=0$

Add 4 to both sides

$x^2-6x-4+4=0+4$

Simplify

$x^2-6x=4$

Rewrite in the form (x+a)² = b

But, in order to rewrite in the form x²+2ax+a²

Solve for 'a'

2ax = -6x

a = -3

so add a² = (-3)² to both sides

$x^2-6x+\left(-3\right)^2=4+\left(-3\right)^2$

$x^2-6x+\left(-3\right)^2=13$

Apply perfect square formula: (a-b)² = a²-2ab+b²

$\left(x-3\right)^2=13$

$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solve

$x-3=\sqrt{13}$

Add 3 to both sides

$x-3+3=\sqrt{13}+3$

Simplify

$x=\sqrt{13}+3$

now solving

$x-3=-\sqrt{13}$

Add 3 to both sides

$x-3+3=-\sqrt{13}+3$

Simplify

$x=-\sqrt{13}+3$

Thus, the solutions to the quadratic equations are:

$x=\sqrt{13}+3,\:x=-\sqrt{13}+3$

4 0

3 years ago

What percentage of the data values represented on a box plot falls between the minimum value and the lower quartile?

Softa [21]

The percentage is 25%

7 0

4 years ago

Read 2 more answers

12 to the power of 2 minus 6 to the power 2 times 3 to the power of 4 plus 5 to the power of 3?

Marina86 [1]

12^2 - 6^2 * 3^4 + 5^3

(144) - (36) * (81) + (125)
144 - (36 * 81) + 125
144 - 2916 + 125
-2,772 + 125
-2,647

5 0

4 years ago

Read 2 more answers