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Shalnov [3]
2 years ago
10

He sum of two numbers, x and y, is 12. the difference of x and two times y is 6. what are the values of x and y? x = 8, y = 4 x

= 10, y = 2 x = 18, y = -6 x = 20, y = -8
Mathematics
1 answer:
Sveta_85 [38]2 years ago
8 0
The last choice is correct
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vfiekz [6]
You follow the rules for the quadratic formula, where

x= (-b +- √(b²-4ac) )/2a

Filling a, b and c in yields

x = (8 +- √(64-164) ) / 2 =>

x = (8 - √-100)/2 or x = (4 + √-100)/2

Well, √-100 = 10i, so then you simplify to the last answer, D:

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7 0
3 years ago
2. Solve the following equations for 0° Sx < 180°.
diamong [38]

Answer:

See below in bold.

Step-by-step explanation:

(1) cosec ( x + 10) = 3

Now cosec x = 1/sin x so

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sin (x + 10) = 1/3

x + 10 = 19.47 , 160.53 degrees

x = 9.47, 150.53 degrees.

(ii) cot (x - 30) =0.45

cot (x - 30)= 1 /tan (x- 30) so we have

tan (x - 30) = 1 / 0.45 = 2.2222

x - 30 = 65.77 degrees

x = 95.77 degrees.

5 0
3 years ago
I travel 1/10 mile in 1/2 second. how many can i travel in one second
Lorico [155]

Answer:

2/10 miles

Step-by-step explanation:

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3 0
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garri49 [273]

Answer:

24

Step-by-step explanation:

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6 0
2 years ago
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