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slamgirl [31]
3 years ago
5

If {4x-3y=17 and 2x-5y=-11 then y=?

Mathematics
1 answer:
anyanavicka [17]3 years ago
3 0
You need to solve this "system of linear equations."  In other words, find a point (x,y) that satisfies both 4x-3y=17 and 2x-5y=-11.

Try solution by elimination.  Multiply the 2nd equation by -2 to obtain -4x+5y=22.  Add this result to the 1st equation.  I'd suggest you write this out to see what is happening.  

 4x-3y=17

-4x+10y=22
----------------
        7y=39.  Solving for y, we get y=39/7 (a rather awkward fraction).

Now find x.  To do this, substitute 39/7 for y in either of the given equations.  Solve the resulting equation for x.

Write your solution in the form (x, y):  ( ? , 39/7).
You might be interested in
What is 12a equal to if 4a plus 6b = 10 and 2a-4b=12?
hram777 [196]
12a=x
4a+6b=10
2a+3b=5
2a-4b=12
a-2b=6
2a+3b+1=a-2b
a+5b+1=0
a=-1-5b

2(-1-5b)+3b=5
-2-10b+3b=5
-2-7b=5
-7b=7
7b=-7
b=-1

-1-5*-1=a
-1+5=a
4=a

4*12=48
12a=48

Hope this helps :)
3 0
3 years ago
Read 2 more answers
Now try 50 for x. If x=50,what I'd y when y=x-20? Does that work with the other equation?
SSSSS [86.1K]
X= 50
Replace the x with the given number.
Y= 50-20
Y= 30
5 0
3 years ago
Need help with math please
Tamiku [17]
The answer is c
(0,8) is the y intercept so the +.. is +8
then pug in 4 to x and find which one equal 0
3 0
3 years ago
Given right triangle jkl, what is the value of cos(l)? five-thirteenths five-twelfths twelve-thirteenths twelve-fifths
kykrilka [37]

The value of the cosine ratio cos(L) is 5/13

<h3>How to determine the cosine ratio?</h3>

The complete question is added as an attachment


Start by calculating the hypotenuse (h) using

h^2 = 5^2 + 12^2

Evaluate the exponent

h^2 = 25 + 144

Evaluate the sum

h^2 = 169

Evaluate the exponent of both sides

h = 13

The cosine ratio is then calculated as:

cos(L) = KL/h

This gives

cos(L) =5/13

Hence, the value of the cosine ratio cos(L) is 5/13

Read more about right triangles at:

brainly.com/question/2437195

#SPJ1

3 0
2 years ago
What is the best approximation for the circumference of a circle with a diameter of 300 feet
garri49 [273]

Answer:

The answer is C=942.48

Step-by-step explanation:

You would figure this out by using the formula C=2πr.

So let's break this down.

Circumference (C) equals (=)  pi (π) times 2 times the radius of the circle.

Since the problem gave you the diameter which is the length from one side of the circle to the other, you have to divide the diameter in half. Which would give you a radius of 150.

Taking the 150 you would multiply 10*2*π.

Which would give you....(drumrollllll)

C=942.48

I hope this helps!!

p.s. have any more questions? Post them and comment the link!♥, Sadie

3 0
3 years ago
Read 2 more answers
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