MATHEMATICS HIGH SCHOOL

2x - 4y = -2
2x + 3y = -16

What is the solution

Answers

Answer 1

Answer:

Answer:

x=-5

y=-2

Step-by-step explanation:

equation 1 - equation 2

(2x-4y=-2) - (2x+3y=-16) = (-7y=14)

y=14/-7=-2

then substitute y=-2 into any equation

2x-4(-2)=-2

2x+8=-2

2x=-10

x=-10/2=-5

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In right triangle LMN, L and M are complementary angles and sin(L) is 19/20. What is cos(M)?A.19/20
B.1/20
C.(square root of 39)/19
D.(square root of 39)/20

Answers

I believe the correct answer from the choices listed above is option A. In right triangle LMN, L and M are complementary angles and sin(L) is 19/20. Therefore, cosine of M would be 19/20 as well. It would be helpful if you draw a figure of the problem. Hope this answers the question.

Answer:

19/20

Step-by-step explanation:

Magda sold her car for $1,900. This was $300 less than twice the original purchase price. What was the original price of Magda's car? Let p represent the original price of the car.A .2p - 300 = 1,900; p = 1,100
B .300p = 1,900 + 2; p = 634
C .300 - 2p = 1,900; p = 800
D .2p = 1,900 - 300; p = 800

Answers

A is correct answer original price is 1100

-7(1+7n)=36-6n this is a very hard solving equations question I don't get HELP!!!

Answers

n=-1 distribute then isolate your variable and divide

-7(1 + 7n) = 36 - 6n
-7(1) - 7(7n) = 36 - 6n
-7 - 49n = 36 - 6n
   +49n    +49n
   -7 = 36 + 43n
   -36   -36
      -43 = 43n
   43    43
      -1 = n

A school band sold 30 raffle tickets, each labeled with a number from 1 to 30. One winning ticket will be drawn.What is the probability that the number of the winning ticket will be a multiple of 4 or the number 19? Express your answer in simplest form.

Answers

The Correct answer is 4/15 I took the same quiz I got it right.

Find the stationary point on the curve y=3x^4 +1 and determine its nature

Answers

$y=3x^4+1\ny'=12x^3\n\n12x^3=0\nx=0\leftarrow \text{stationary point}\n\n\forall x\in(-\infty,0)\ y'<0\Rightarrow y\searrow\n\forall x\in(0,\infty)\ y'>0\Rightarrow y\nearrow\n\Downarrow\ny(0)=y_(min)$

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