Ask question

Ask question

All categories

2 years ago

8

Solve the system using substitution 8x+9y=15 5x-2y=17

1 answer:

Otrada [13]2 years ago

8 0

$5x-2y=17\ \ \ \ |-5x\\-2y=-5x+17\ \ \ \ |:(-2)\\y=2.5x-8.5\\\\\text{substitute to the first equation}\\\\9x+9(2.5x-8.5)=17\ \ \ \ |\text{use distributive property}\\9x+22.5x-76.5=17\ \ \ \ |+76.5\\31.5x=93.5\ \ \ \ |:31,5\\x=3\\\\\text{substitute the value of x to the equation}\ y=2.5x-8.5\\\\y=2.5(3)-8.5=7.5-8.5=-1\\\\Answer:\ x=3,\ y=-1\to(3;\ -1)$

You might be interested in

The cost of electricity in a certain city is $0.08 for each of the first 300kWh (kilowatt-hours) and $0.13 for each kilowatt-hou

Ivahew [28]

Step-by-step explanation:

0.08*300 + 0.13x = 51.95

Multiply thru by 100 to get:

8*300 + 13x = 5195

13x = 5195-2400

13x = 2,795

x = 215 hours

7 0

2 years ago

Read 2 more answers

2x-3y=32<br> 1/2(2X+3y)=-8

Alex787 [66]

Answer:

x=4 :y=-8

Just ut Equation in Scientific Calculator or Symbolab App or WEb search Equation solver

8 0

2 years ago

The formulas for power and work are and , where P= w/t is the power, W= fd

Klio2033 [76]

P = W/t
W = Fd

P = Fd/t = F/t d

6 0

3 years ago

Read 2 more answers

Each member of the swim team must pay $76 to join the team. There are 376 members. How much does the team receive in dues?

Basile [38]

Answer:

$28,576

Step-by-step explanation:

$76 (amount that each member pays) * 376 (total members) = $28,576 (amount that will be received in dues)

I hope this helps :)

7 0

2 years ago

How many possible passwords can you have if you can use numbers, letters, or capital letters but you must have at least one capi

belka [17]

Answer:

628 possible passwords.

6 0

2 years ago