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Anton [14]
3 years ago
12

I'm having trouble with this -9x + 4y = 55 -11x + 7y = 82

Mathematics
2 answers:
lubasha [3.4K]3 years ago
7 0

Answer:

Step-by-step explanation:

99x - 44y = -605

-99x + 63y = 738

19y = 133

y = 7

-9x + 28 = 55

-9x = 27

x = -3

(-3, 7)

Dominik [7]3 years ago
4 0
Y = 7 & x= -3 so the vertex is (-3,7)
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The perimeter of a triangle is 17x−5 units. One side is 3x+5 units and another is 8x−3 units. How many units long is the third s
Inessa05 [86]

9514 1404 393

Answer:

  6x -7 units

Step-by-step explanation:

Let c represent the length of the third side. The perimeter is the sum of the three side lengths.

  P = a + b + c

  (17x -5) = (3x +5) +(8x -3) +c

 17x -5 = 11x +2 + c . . . . . . . . . . . . collect terms

  6x -7 = c . . . . . . . . . . . . . . subtract 11x+2

The third side is 6x -7 units.

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2 years ago
If d = 20 and C = 20π
Olin [163]
What is this question
7 0
3 years ago
You get paid $12/hr and earned $36, how many hours did you work?
Montano1993 [528]

Answer:

3 hours

Step-by-step explanation:

36 divided by 12 equals 3

4 0
1 year ago
Show working out please
Vlad [161]

If 40% are boys, 60% are grills.

As fractions:

4/10 = 2/5 are boys

6/10 = 3/5 are grills

70% or 7/10 of the boys arrive by car:

(2/5)(7/10) = 14/50 = 7/25

And 60% or 3/5 of the grills arrive by car:

(3/5)(3/5) = 9/25

So in total we have 7/25 + 9/25 = 16/25 = 64/100 = 64%

64% chance that a child arrives by car.

4 0
3 years ago
What is the value of the expression 2x2 + 3x-y – 4y2 when x = 2 and y = –4?
sdas [7]
Write the problem: 2x^2+3x-y-4y^2
Substitute x and y: 2(2)^2+3(2)-(-4)-4(-4)^2
Exponents and Multiplication: 8+6+4-64
Add and Subtract: -46

Your Answer is -46
7 0
3 years ago
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