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matrenka [14]
2 years ago
15

Factor x4 - y4 completely.

Mathematics
1 answer:
Natalka [10]2 years ago
6 0

Option A

Rate as BRAINLIEST

if any doubt leave a comment

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Find the area of a circle with a circumference of 37.68 units.
Gnom [1K]

Circumference of a circle:

C = 2 pi r

r = C / 2 pi

r = 37.68 / (2 * 3.14)

r = 6

Area of a circle:

A = pi r^2

A = 3.14 * 6^2

A = 113.04

Answer

The area of a circle = 113.04 square units

8 0
4 years ago
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What's numbers 21 and 22 thx!
Naya [18.7K]
21: N = 25.

22: 

1: 19
2: 30
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3 years ago
Laura just finished a new book about a time-traveling magician. She read the same amount every day and completed the book in jus
svp [43]
So you have 85 pages and 10 days.
You would do 85/10 to get 8.5 pages each day. Hope that’s right !
5 0
2 years ago
The diffrence between the roots of the equation 2x^2-5x+c=0 is 0.25 find c
kumpel [21]

Answer:

  • c = 3.09375

Step-by-step explanation:

<u>Standard for of quadratic equation:</u>

  • ax² + bx + c = 0

<u>We have </u>

  • 2x² - 5x + c = 0

<u>Sum of the roots </u>

  • x₁ + x₂ = - b/a = -(-5)/2 = 2.5

<u>Product of the roots </u>

  • x₁x₂ = c/a = c / 2

<u>We have:</u>

  • x₁ - x₂ = 0.25

<u>The square of the above is:</u>

  • (x₁ - x₂)² = (x₁ + x₂)² - 4x₁x₂

<u>Substitute known values and solve for c:</u>

  • 0.25² = (2.5)² - 4(c/2)
  • 2c = 6.25 - 0.0625
  • 2c = 6.1875
  • c = 3.09375
6 0
3 years ago
In ΔXYZ, ∠X=82° and ∠Y=84°. ∠XWZ=90° and XY=97. Find the length of XW to the nearest integer.
ivanzaharov [21]

Check the picture below to the left, let's use those sides with the law of sines

\textit{Law of sines} \\\\ \cfrac{sin(\measuredangle A)}{a}=\cfrac{sin(\measuredangle B)}{b}=\cfrac{sin(\measuredangle C)}{c} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{sin(14^o)}{97}=\cfrac{sin(84^o)}{XZ}\implies XZ = \cfrac{97\cdot sin(84^o)}{sin(14^o)}\implies XZ \approx 398.76 \\\\\\ \stackrel{\textit{now using SOH CAH TOA}}{cos(82^o) = \cfrac{XW}{XZ}}\implies XZcos(82^o)=XW \\\\\\ 398.76cos(82^o)\approx XW\implies 55.497\approx XW\implies \stackrel{\textit{rounded up}}{55=XW}

7 0
3 years ago
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