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sweet-ann [11.9K]
3 years ago
12

7x-6y=9 5x+2y=19 Solve the system using elimination.

Mathematics
1 answer:
ikadub [295]3 years ago
4 0

Step-by-step explanation:

multiply 5x+2y=19 by 3 youll get 15x+6y=57

eliminate y

7x-6y=9

<u>15x+6y=57</u><u> </u> +

22x=66

x=3

substitute x to 5x+2y=19

15+2y=19

2y=4

y=2

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PLEASE HELP ASAP 25 PTS + BRAINLIEST FOR RIGHT/BEST ANSWER
sergejj [24]

8y = 4x -16

-x = -2y -4


Multiply all terms in the second equation by -1:

-x = -2y -4 x -1 = x = 2y +4


Now replace x in the first equation with this.


8y = 4(2y+4)


Simplify:

8y = 8y +16



Because there is an 8y on both sides of the equation, it cannot be solved.


The answer is no solution.

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3 years ago
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What is the quotient?
AlexFokin [52]

Answer:

3/2

Step-by-step explanation:

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Flip the second fraction by putting 1 instead 4 and vice versa.

● (-3/8)* (-4/1)

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● (-3/8)*(-4)

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Simplify by eliminating 4 in the fraction.

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7 0
3 years ago
Find the solution(s) to the equation sin(x/2) + cos x - 1 = 0 on the interval 0 less than or equal to x 2pie
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Answer:

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Step-by-step explanation:

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56° and 34°

complementary angles sum to 90° thus

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x = \frac{110}{5} = 22

angle 2x - 10 = (2 × 22) - 10 = 44 - 10 = 34° and

angle 3x - 10 = (3 × 22) - 10 = 66 - 10 = 56°


3 0
4 years ago
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