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irinina [24]
4 years ago
15

Solve the system by the substitution method. 7x + y = -6 7x - 3y = 18

Mathematics
2 answers:
Elodia [21]4 years ago
7 0

Answer:

Stdivise 7 aep-by-step explanation:

Yuri [45]4 years ago
3 0

Answer:

Step-by-step explanation:

7x + y = -6

y = -7x - 6

7x - 3y = 18

7x - 3(-7x - 6) = 18

7x + 21x + 18 = 18

7x + 21x = 18 - 18

28x = 0

x = 0/28

x = 0 <=========

7x + y = -6

7(0) + y = -6

0 + y = -6

y = -6 <==========

solution is : (0,-6)

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Please help me out on these. ASAP I will mark you as brainliest if you do and if your answers are right :))
Charra [1.4K]

Answer:

1.6

2. Honestly, I think it is, because it repeats at regular intervals. The period is -2.

Step-by-step explanation:

7 0
3 years ago
Question
RideAnS [48]

Answer:

D

Step-by-step explanation:

There are 9 letters, which contains 2Qs, 3Ls and 4Bs.

If the 9 letters are distinct, the number of permutations they have will be 9!.

! is the factorial sign.

9! = 9*8*7*6*5*4*3*2*1

HOWEVER, we have some identical elements, so we need to get rid of the permutations of the same letters.

Thus we have:

\dfrac{9!}{2!*3!*4!} =\dfrac{9*8*7*6*5}{2*3*2*1} = \dfrac{9*4*7*5}{1} = 63*20=1260

The answer is D

6 0
3 years ago
which method for comparing fractions were you unaware of before reading? use it to compare 2/3 and 3/4​
wolverine [178]

Good morning

______

Answer:

2/3 < 3/4​

___________________

Step-by-step explanation:

2/3 = (2*4)/(3*4)=8/12

3/4 = (3*3)/(4*3)=9/12

Since 9/12>8/12 then 3/4>2/3

:)

6 0
3 years ago
∠1 and ∠2 are a linear pair. m∠1 = x - 29, and m∠2 = x + 61. Find the measure of each angle. A) ∠1 = 74; ∠2 = 106 B) ∠1 = 74; ∠2
Ne4ueva [31]

Answer:

D)

Step-by-step explanation:

∠1 + ∠2 = 180 {linear pair}

x - 29 + x + 61 = 180   {add the like terms}

2x + 32 = 180   {subtract 32 from both sides}

2x + 32 - 32 = 180 - 32

2x = 148

x = 148/2

x = 74

∠1 = x - 29 = 74 - 29 = 45

∠2 = x + 61 = 74 + 61 = 135

8 0
4 years ago
What is the slope of a line that is perpendicular to the line whose equation is 2x + y = 4
wel

The slope of the line of the equation given is -2 (by solving for y, you get y = -2x+4).


So, in order to be perpendicular, you must take the negative reciprocal.

The slope would be -1/2.

6 0
3 years ago
Read 2 more answers
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