All categories

2 years ago

Solve the simultaneous equations 2x+2y=15

Mathematics

2 answers:

makkiz [27]2 years ago

7 0

Answer: x = −y + 15/2

Step-by-step explanation:

2x + 2y = 15

2x + 2y + −2y = 15 + −2y

2x = −2y + 15

2x /2 = −2y +15 /2

x = −y + 15/2

Delicious77 [7]2 years ago

6 0

Answer:

We need to find a relationship between the equations.

Let's solve for one variable.

2x + 2y = 15

2y = 15 - 2x

We know what 2y is in relation to x. Now we can solve.

2x + 15-2x = 15

15 = 15

Unless there are more equations, this is your answer. For it to be simultaneous you need more than one equation.

You might be interested in

Three friends earned more than $197 washing cars. They paid their parents $28 for supplies and then divided the rest of the mone

Umnica [9.8K]

Answer:

x>169/3

Step-by-step explanation:

x- the money that each earned

3x>197-28

3x>169

x>169/3

6 0

2 years ago

Area between two shapes. Pls help geometry IXL !

fenix001 [56]

Step-by-step explanation:

Area of shaded region = area of exterior rectangle - area of interior rectangle

$37 \times 28 - 11 \times 20 \\ \\ = 1,036 - 220 \\ \\ = 816 \: {yards}^{2} \\$

4 0

2 years ago

Read 2 more answers

Bill earns £10.50 per hour for the first 20 hours,

IrinaK [193]

315 dollars. u basically just multiply 10.50 with 30 hours s

6 0

2 years ago

Please help me with this math problem :)

telo118 [61]

The correct answer is C. hope this helps

4 0

2 years ago

An ice-cream store sold 70 sundaes. The ratio of

elixir [45]

Answer:

30 strawberry sundaes.

Step-by-step explanation:

We know there is a total of 70 sundaes.

3 sundaes will be strawberry.

4 sundaes will be choclate.

When you add 3 and 4 together, you get 7. This is your total ratio.

So 3/7 of the sundaes are strawberry.

And 4/7 of sundaes are choclate.

We know there is a total of 70 sundaes.

The total ratio we figured out is 7.

If the total sundaes is 70, and the total ration is 7. Then the total sundaes is 10 times bigger than the ratio.

This means we need to multiply the 3 strawberry sundaes and 4 choclate sundaes by 10.

3*10=30

4*10=40

So there are 30 strawberry sundaes and 40 choclate sundaes.

We need to find the strawberry sundae amount, so the answer is 30.

Hope this helps!

3 0

2 years ago