If you multiply the top equation by 2 and the bottom equation by -5, then there will be a 10x in the first equation and a -10x in the second, which you can cancel out in the next step. Therefore, the correct answer choice is C. Hope this helps!

6 0

3 years ago

Solve the system of equations algebraically.<br> 4x - 3y = 6<br> 6x - 5y = 6

muminat

Answer: x=6 y=6

Step-by-step explanation:

$\displaystyle\\\left \{ {{4x-3y=6} \atop {6x-5y=6}} \right.\\$

Since the right parts of the equation are equal, therefore the left parts of the equation are also equal:

$4x-3y=6x-5y\\4x-3y+5y=6x-5y+5y\\4x+2y=6x\\4x+2y-4x=6x-4x\\2y=2x\\$

Divide both parts of the equation by 2:

$y=x\\Hence,\\4x-3x=6\\x=6\\Thus,\\x=y=6$

3 0

2 years ago

A group of people were asked if Marilyn Monroe had an affair with JFK. 184 responded "yes", and 387 responded "no". Find the pro

agasfer [191]

Answer:

0.6778 to 4 dec. places.

Step-by-step explanation:

That is 387 / (184+387)

= 387 / 571

= 0.677758

6 0

4 years ago

Rick is buying a $115 tennis racquet from a sporting goods store. If the racquet is on sale for 35% off and sales tax is 8%, how

lapo4ka [179]

Answer:

$80.73

Step-by-step explanation:

115 * 0.35 = $40.25 off

115 - 40.25 = $74.75 after sale

add tax (0.08)

74.75 * 0.08 = $5.98 tax

74.75 + 5.98 = $80.73 in total

6 0

4 years ago