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lana [24]
3 years ago
14

Given ????(a1, aa2), ????(????1, ????2), ????(c1, c2), and ????(d1, d2), find a general formula in terms of a1, a2, ????1, ????2

, c1, c2, d1, and
d2 that will let us determine whether AB and CD are perpendicular.
Mathematics
1 answer:
xxMikexx [17]3 years ago
7 0

cant help when you put question marks!

please do this better!

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Can someone help me? I know that t=20 I just don't know how to get there
Aneli [31]
2t/5=8t/20    (both numbers multiplied by 4)

t/4=5t/20    (both numbers multiplied by 5)

3=60/20

⇒ 8t/20 - 5t/20= 60/20

3t/20=60/20

⇒3t=60

t=60:3

t=20

I hope you understand !
7 0
3 years ago
Factor the polynomial. 7x2 + 68xy - 20y2 A) (7x - 2y)(x + 10y) B) (7x - 10y)(x - 2y) C) (7x + 10y)(x + 2y) D) (7x + 2y)(x - 10y)
Otrada [13]
For this case we have the following polynomial:
 7x2 + 68xy - 20y2
 Factoring we have:
 (7x-2y) (x + 10y)
 We verify the factorization:
 7x2 + 70xy - 2xy - 20y2
 Rewriting we have:
 7x2 + 68xy - 20y2
 Therefore, the factorization is correct.
 Answer:
 
A) (7x - 2y) (x + 10y)
5 0
3 years ago
Simplify the fraction <br><br> (9x² - 12x +4/ 3x²+ x - 2) ÷ (12x² - 5x - 2 / 4x²+5x + 1)
solmaris [256]
When simplified, the answer is 1
5 0
3 years ago
A bank teller provides the balance of Halle’s account before and after she withdraws some money. Before: $500 After: $327
vredina [299]
That means she withdrew 173 dollars
3 0
3 years ago
How many t-shirts did the company purchase if their total cost was $100? Explain how you found your answer.
Mrrafil [7]
16 t-shirts

because the rate is $6.25
$100/$6.25 =16

Hope this helps ;)
3 0
3 years ago
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