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arsen [322]
3 years ago
13

Help me please guys​

Mathematics
2 answers:
ss7ja [257]3 years ago
7 0
-2,-5 because the inverse is the oppisite of any number, so the opposite of 2,5 is -2,-5
Jlenok [28]3 years ago
5 0

Answer:

(9,6)

Step-by-step explanation:

You just take one of the (x,y) pairs and switch the numbers with each other so it's like (y,x)

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Three identical coins, labeled A, B, and C in the figure, lie on three corners of a square 10.0 cm on a side. Determine the x co
shepuryov [24]
<span>The line of symmetry of the triangle bisects the right angle and the diagonal of the square.
The line is 1/2 the length of the square's diagonal :

(1/2)(10√2) = 5√2. 

</span>Let CG be a distance x from the vertex of the right angle in the triangle.
Remaining distance = 5√2 - x. 
<span>
(1)(x) = (2)(5√2 - x)</span>
x = 10√2 - 2x
<span>3x = 10√2 </span>
<span>x = (10/3)√2. 
</span>
Using Pythagorean theorem,
x^2 + y^2 = c^2
 
<span>c = (10/3)√2,
and x = y,
so 2x^2 = 200/9
x = √(100/9) = 10/3 = y. 
</span>
<span>x = y = 3.333</span>
5 0
3 years ago
Select all of the following that are quadratic equations.
deff fn [24]
What you want to do is solve all of these so that it equals to 0 on one side. The ones that are a quadratic will have x^2

x^2 - 2x = 4x + 1
x^2 - 6x - 1 = 0
Yes this is a quadratic

x^3 - 6x^2 + 8 = 0
No this is not a quadratic because the highest power of x is to the power of 3

5x - 3 = 0
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2x^2 + 12x = 0
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5x - 1 = 3x + 8
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9x^2 + 6x - 3 = 0
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7 0
4 years ago
If 50 grams of a radioactive substance decomposed to 42 grams in 2 years, then, to the nearest gram, the amount left after 5 yea
Inga [223]

Answer:

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Step-by-step explanation:

50-42=8

8÷2=4

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50-20=30

Hope u can understant

3 0
3 years ago
A washer and a dryer cost $676 combined. The washer costs $74 less than the dryer. What is the cost of the dryer?
Arlecino [84]

Answer: The dryer cost $375.

Step-by-step explanation:

676 - 74 = 602

602/2 = 301

301 + 74 = 375

3 0
3 years ago
When Sarah passes a ball on a sidewalk to her friend, the ball bounces off at the same angle that it was thrown. Use the figure
densk [106]

a. 40  if you dont believe me just look at a 40 degree triangle then the pic

5 0
3 years ago
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