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ivann1987 [24]
3 years ago
14

Solve the Simultaneous equations 2x + 4y = 9 and 4x2 + 16y2 = 20x + 4y - 19

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
8 0

Answer:

I'm so sorry I can't help but you can try and use math-way to answer anyquestions regarding equations and such!

LiRa [457]3 years ago
5 0

well (no, not again) I have to use substitution method for this one.

Alright here goes nothing.

2x+4y=9 and 4x^2 +16y^2=20x+4y-19

2x+4y=9  

2x=9-4y

x=9-4y/2  ......this is equation 1

substituting value of x in 4x^2 + 16y^2=20x+4y-19 ,

4(9-4y/2)^2+ 16(9-4y/2)^2 = 20(9-4y/2)^2+4y-19

=324+64y^2-144y + 324+64y^2-144y = 71-36y

=648+128y^2-288y=71-36y

= 648-71+128y^2-288y+36y

= 577+128y^2-252y

solving the above equation using quadratic formula , we get y=2.56

substituting value of y in equation 1 , we get

2x+4(2.56)=9

2x= 9-4(2.56)

x=0.62 or -0.62

Thank you very much lol , this problem was so huge that it made my day.

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1+1+1+1+11+1+1+1+1+1+1+1+1-1-1-1

20?

7 0
3 years ago
Read 2 more answers
This is the second one
sladkih [1.3K]
Angles in a 4-sided shape = 360 degrees
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8 0
3 years ago
Is five ones larger than fifty tenths ?
anyanavicka [17]
5 ones is the same as 5 times 1 which is 5
50 tens is the same as 50 times 10 which is 500
So 50 tens is larger than five ones. Hope that helped. Have a nice day
4 0
3 years ago
18x2 + 50 = 0<br> What are the solutions and how do you get them ?
Artist 52 [7]

Answer:86

Step-by-step explanation:

You would do multiplication first so 18x2 = 36 then you would add 36+50 which equals 86

7 0
3 years ago
Read 2 more answers
a restaurant can seat 100 people . it has booths that seat 4 people and tables that seat 6 people.so far , 5 of the booths are f
Natasha2012 [34]
Is this the whole question? If so, this how I found my answer(I do not know if this is the answer 100% and I won't and can't take credit for the answer being incorrect. It is your choice to go with my answer, thank you.): 

A restaurant can seat 100 people. Okay, the capacity is 100. Got it. It has booths that seat 4 people. Okay! So I am going to represent B"Booths" as "B". A variable. B = 4. Okay, let's continue. And, it has tables that seat 6 people. I will represent "Tables" as T. So, T = 6!

Alllrighty then, let's get to the nit and grit..

B = 4 T = 6

In the last sentence, it says, 5 of the booths are full, what expression matches the situation? Well, it's ONLY asking for the expression, so that's all we'll give.

We don't need the "table" variable because it's asking about the booths so, bye bye tables. B = 4, and 5 of them are full. We would have to do B(5) or B * 5. B equals 4 so 4 * 5 which equals 20. The expressions we could use are:

B(5) = 20
 or
4 * 5 = 20
or
20 = 4 * 5 = B(5)

I hope this answer helps you out! Bye! :)
4 0
3 years ago
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