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3 years ago

Describe the difference between solving |x| ≤ 5 and solving |x| ≥ 5.

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

8 0

|x| is greater then 5 on |X|>5 and the other x is lees then 5 on |X|<5

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8.) Simplify.

Aleks04 [339]

Answer:

The answer to your question is letter E. cos²α

Step-by-step explanation:

cot²Ф - cot²Фcos²Ф

Remember that cot = $\frac{cos \alpha}{sin \alpha }$ ; substitute in the previous equation

$\frac{cos^{2}\alpha }{sin^{2} \alpha} - \frac{cos^{2}\alpha }{sin^{2}\alpha } cos^{2}\alpha$

$\frac{cos^{2}\alpha - cos^{4}\alpha }{sin^{2}\alpha }$ Factor cos²α

$\frac{cos^{2}\alpha(1 - cos^{2}\alpha }{sin^{2}\alpha }$

Remember that sin²α = 1 - cos²α

$\frac{cos^{2}\alpha sin^{2}\alpha}{sin^{2} \alpha}$

Simplify

cos²α

7 0

3 years ago

Place these metric units in order from the smallest to the largest: meter, millimeter, kilometer, decimeter, centimeter, dekamet

hammer [34]

Millimeter
centimeter
decimeter
meter
dekameter
hectometer
kilometer

there is it

8 0

3 years ago

Write -2/9 as a decimal.

Inessa [10]

-2/9 is equal to -0.222222222 and it keeps on going hope it helps!

5 0

3 years ago

Read 2 more answers

Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore, and recorded number of pages in each textboo

jeka94

Answer:

y = -0.85 + 0.09x; $49.82

Step-by-step explanation:

1. Calculate Σx, Σy, Σxy, and Σx²

The calculation is tedious but not difficult.

$\begin{array}{rrrr}\mathbf{x} & \mathbf{y} & \mathbf{xy} & \mathbf{x^{2}}\\526 & 52.08 & 27394.08 & 276676\\625& 59.00 & 36875.00 &390625\\589 & 56.12 & 33054.68 & 346921\\409 & 25.72 & 10519.48 & 167281\\489 & 34.12& 16684.68 & 293121\\500 & 53.00 & 26500.00 &250000\\906 & 76.48 & 71102.88 & 820836\\251 &26.08 & 6546.08 & 63001\\595 & 50.60 & 30107.00 & 354025\\719 & 68.52 & 49265.88 & 516961\\\mathbf{5609} & \mathbf{503.72} &\mathbf{308049.76} & \mathbf{3425447}\\\end{array}$

2. Calculate the coefficients in the regression equation

$a = \dfrac{\sum y \sum x^{2} - \sum x \sum xy}{n\sum x^{2}- \left (\sum x\right )^{2}} = \dfrac{503.7 \times 3425447 - 5609 \times 308049.76}{10 \times 3425447- 5609^{2}}\\\\= \dfrac{1725466163 - 1727851103.84}{34254470 - 31460881} = -\dfrac{2384941}{2793589}= \mathbf{-0.8537}$

$b = \dfrac{n\sumx y - \sum x \sumxy}{n\sum x^{2}- \left (\sum x\right )^{2}} = \dfrac{3080498 - 2825365.48}{2793589} = \dfrac{255132}{2793589} = \mathbf{0.09133}$

To two decimal places, the regression equation is

y = -0.85 + 0.09x

3. Prediction

If x = 563,

y = -0.85 + 0.09x = -0.85 + 0.09 × 563 = -0.85 + 50.67 = $49.82

(If we don't round the regression equation to two decimal places, the predicted value is $50.56.)

4 0

4 years ago

A package of tickets for four home game costs 180$. What proportion can you write to find what 12-game package costs if all indi

Sophie [7]

"21 lol jfhfhdhdhhhhhhh"

6 0

3 years ago