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VMariaS [17]
3 years ago
6

Solve the system of equations by graphing. x+y=3 y=2x−15

Mathematics
2 answers:
nexus9112 [7]3 years ago
6 0

Answer:

Step-by-step explanation:

x+y=3

graphing the equation by X intercept (3,0) and Y intercept (0,3)

y=2x-15

graphing the equation with slope = positive 2

and Y intercept = -15

and graphs of these lines are given as follows

solution is given by (6,-3)

Stella [2.4K]3 years ago
4 0

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

x + y = 3

x = 3 - y


y = 2x - 15

y = 2(3 - y) - 15

y = 6 - 2y - 15

y = -2y - 9

3y = -9

y = -3


y = 2x - 15

-3 = 2x - 15

-2x = -12

x = 6


So...

The answer is: (6, -3)

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Step-by-step explanation:

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Hope my answer helps :)

7 0
2 years ago
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inessss [21]
The race is 111.6 m long.

8 hurdles spaced 12.3 m apart means 7 spaces that are 12.3 m in length; 7*12.3 = 86.1

Add to this the distance to the first hurdle and the distance from the last hurdle:
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3 0
3 years ago
A jeweler wants to combine a 60% gold alloy with a 20% gold alloy to make 1000 grams of 50% gold alloy. How many grams of 60% al
kramer

Answer:

750 grams of 60% alloy

Step-by-step explanation:

Define x = amount of 60% alloy and y = amount of 20% alloy

Equating the amounts of gold:

0.6x+0.2y = 1000(0.5)

Since there must be 1000 grams total:

x+y = 1000

Writing the 2 resulting equations together:

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x + y = 1000

Multiply the first equation by 5:

3x + y = 2500

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Subtracting the 2nd equation from the 1st:

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Answer: 750 grams of 60% alloy

7 0
1 year ago
What is the discount on a pair of shoes with a regular price of $48?
Korolek [52]
The discounts on a pair of shoes with a regular price of $48 is 24
8 0
1 year ago
Need help on this one I really don’t get this
Sophie [7]
Its 0 cause 0 divided by any number is 0 but if it was 15/0, then it would be undefined
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