3 years ago

Solve by elimination 8x-6y=-20 -16x+7y=30

Mathematics

1 answer:

guajiro [1.7K]3 years ago

7 0

The answer is

X=-1

Y=2

You might be interested in

Write a 3-digit number that can be divided by 3 but not by 10.

NARA [144]

Answer:

999

Step-by-step explanation:

8 0

3 years ago

Solve the given initial-value problem. y'' + 9y = 0, y(0) = 6, y'(0) = −3

Taya2010 [7]

I believe it's y'(0)=-3

I was only able to simplify the equation.

Hope this helps

5 0

4 years ago

1) 5x-2y=4. 2) 3x-5y=13 x-2y=5<br>3x+y=9

Natali [406]

$\left\{\begin{array}{ccc}5x-2y=4\\3x+y=9&/\cdot2\end{array}\right\\+\left\{\begin{array}{ccc}5x-2y=4\\6x+2y=18\end{array}\right\\----------\\.\ \ \ \ \ 11x=22\ \ \ \ /:11\\.\ \ \ \ \ \ \ x=2\\\\3\cdot2+y=9\\6+y=9\\y=9-6\\y=3\\\\Answer:x=2;\ y=3$

$\left\{\begin{array}{ccc}3x-5y=13\\x-2y=5\end{array}\right\\\left\{\begin{array}{ccc}3x-5y=13\\x=2y+5\end{array}\right\\\\substitute:\\\\3(2y+5)-5y=13\\6y+15-5y=13\\y=13-15\\y=-2\\\\x=2\cdot(-2)+5=-4+5=1\\\\Answer:x=1;\ y=-2.$

5 0

3 years ago

When a graph line is vertical, it indicates that the relation:

marta [7]

Answer:

The relation has an undefined slope if the graph line is just vertical.

7 0

3 years ago

A bus can at most be filled with 36 passengers. If there are

raketka [301]

Answer:

if you subtract 36-25=11 so 11 more passenger can come in the bus

7 0

3 years ago