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maw [93]
3 years ago
12

C.6 12. Expand & simplify: (x - 5)(x-4)

Mathematics
1 answer:
Butoxors [25]3 years ago
6 0

Answer:

Step-by-step explanation:

(x - 5)(x-4)

= x(x) - 4(x) - 5(x) - 4(-5)

= x^2 - 4x - 5x + 20

= x^2 - 9x + 20

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3/2 g.oogle if you want the explanation of your work.

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How to do 30(c) ??????
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Answer:

A kite with a 100 foot-long string is caught in a tree. When the full length of the string is stretched in a straight line to the ground, it touches the ground a distance of 30 feet from the bottom of the tree. Find the measure of the angle between the kite string and the ground.

17°

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Step-by-step explanation:

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3 years ago
What kind of word problem can be solved with a two-variable equation?​
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5 0
3 years ago
Can you tell me what correct answer is and why
solmaris [256]

Answer:

The correct answer is D...

Step-by-step explanation:

In order to find the distance of the diagonals, you would need to use the distance formula...

The square root of (x2-x1)^2 + (y2-y1)^2

After you plug in the letters into the appropriate places you should get the square root of (a+b)^2 +c

8 0
3 years ago
What is the positive solution to the equation 0 = –x2 + 2x + 1? Quadratic formula: x = StartFraction negative b plus or minus St
katrin [286]

Answer:

x = 2 + √2

x = 2 - √2

Step-by-step explanation:

- x² + 2x + 1 = 0

x² - 2x - 1 = 0

Here,

a = <em>1</em>

b = <em>- 2</em>

c = <em>- 1</em>

Now,

Discriminant

D = b² - 4ac

= (-2)² - 4(1)(-1)

= 4 + 4

= 8

=2√2 > 0

<em><u>Real and </u></em><em><u>D</u></em><em><u>istinct roots </u></em>

x = - b +- √b² - 4ac/2a

= - (-2) +- √ = (-2)² - 4(1)(-1)/2(1)

= 2 +- √4 + 4/2

= 2 +- √8/2

= 2 +- 2√2/2

= 2 +- √2

x = 2 + √2 or x = 2 - √2

7 0
3 years ago
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