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3 years ago

Five pounds of bananas cost $2.35. How much does it cost per pound?

Mathematics

1 answer:

andrezito [222]3 years ago

6 0

Answer:

The answer is 0.47

Step-by-step explanation:

You can get this answer by doing division 5 divided by 2.35 and

then you get 0.47

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Follow the rule x2+2 to complete the pattern of 8

lilavasa [31]

I think your saying 8=x if that is the case then you would plug it in (8)2+2 which would equal 18

4 0

3 years ago

How do I find the zeros of x^4-10x^3-66x^2-94x-39

Gennadij [26K]

Answer: x = -1, -3, 7 + √62, 7 - √62

Step-by-step explanation:

q p

x⁴ - 10x³ - 66x² - 94x - 39

$\frac{p}{q}$ = +/- $\frac{1*3*13*39}{1}$

possible rational factors: 1, -1, 3, -3, 13, -13, 39, -39

Use synthetic division or long division to see which factor will leave a remainder of 0.

try x + 1 = 0 ⇒ x = -1

-1 | 1 -10 -66 -94 -39

| ↓ -1 11 55 39

1 -11 -55 -39 0

(x + 1)(x³ - 11x² - 55x - 39)

next, try x + 3 = 0 ⇒ x = -3 for the new polynomial

-3 | 1 -11 -55 -39

| ↓ -3 42 39

1 -14 -13 0

(x + 1)(x + 3)(x² - 14x - 13)

Lastly: find the zeros by setting each factor equal to zero and solve.

x + 1 = 0 ⇒ x = -1

x + 3 = 0 ⇒ x = -3

x² - 14x - 13 = 0

$x = \frac{-(b) +/- \sqrt{(b)^{2} -4(a)(c)}}{2(a)}$

$= \frac{-(-14) +/- \sqrt{(-14)^{2} -4(1)(-13)}}{2(1)}$

$= \frac{14 +/- \sqrt{196+52}}{2}$

$= \frac{14 +/- \sqrt{248}}{2}$

$= \frac{14 +/- 2\sqrt{62}}{2}$

$= 7 +/- \sqrt{62}$

5 0

2 years ago

COMPLETE Find the value of the function for O. sin(45°) = ?

geniusboy [140]

Answer: $\sqrt{2}/2$ which is Choice B

This is the same as writing $\frac{\sqrt{2}}{2}$

The second "2" is not under or inside the square root.

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Explanation:

Refer to the unit circle below. I've highlighted the angle 45 degrees and its corresponding sine value. It's the y coordinate of the point on the unit circle, for this particular angle.

Therefore, $\sin(45^{\circ}) = \frac{\sqrt{2}}{2}$

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You could alternatively draw out a 45-45-90 triangle. Let x be the leg length and the hypotenuse is 1 unit long. Solve $x^2+x^2 = 1$ for x and you should get $x = \frac{\sqrt{2}}{2}$ as the length of each leg.