4. Write the equation

Mathematics

2 answers:

Llana [10]2 years ago

8 0

Answer:

a.give the y-intercept

makvit [3.9K]2 years ago

7 0

Answer:

Step-by-step explanation:

$\frac{-1}{2}(2x - 6y) = 12\\\\\frac{-1}{2}*2x - 6y *\frac{-1}{2}=12\\\\-x + 3y = 12\\\\ 3y = x + 12\\\\ y = \frac{1}{3}x+\frac{1}{3}*12\\\\ y = \frac{1}{3}x + 4$

b) Slope = (1/3)

c) y-intercept = 4

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Numbers like 10,100,1000, and so on are called blank

Evgen [1.6K]

Multiples of 10.

Is that what you are asking?

6 0

2 years ago

Kelly needs to order lunch for orders 6 people at a business meeting. Her menu choices are chicken salad for a cost of $5 per pe

nirvana33 [79]

Ok , with that information we can write the equations
x + y = 6
5x + 4y = 28

Where x = how many people ordered chicken
and y = how many people ordered egg salad

Through elimination , we can set one of the variables in both equations equal so we can eliminate it :

(4)x + (4)y = (4)6
5x + 4y = 28

4x + 4y = 24. equation 1
5x + 4y = 28. equation 2

Now we can subtract the second equation by the first equation and isolate one variable:
equation 2 - equation 1

5x - 4x + 4y - 4y = 28 - 24

x = 4

Now that we discovered our x value ( How many people ordered chicken salad ) , we can apply it to one of the equations and discover y ( how many people ordered egg salad)

x + y = 6
x= 4
4 + y = 6

We can shift 4 to the other side of the equation by subtracting 4 from both sides of the equation:
4 - 4 + y = 6 - 4
y = 2

x=4 and y=2

So the awnser is :
4 people ordered chicken salad and 2 people ordered egg salad!

I hope you understood my brief explanation!!

p.s if you want to know how to use another method to solve these problems ( Substition) , just let me know in a comentary down here

5 0

2 years ago

In a survey of 400 seniors, x percent said that they plan on majoring in physics. One university has used this data to estimate

azamat

Answer:

2 percent

Step-by-step explanation:

We can use two separate fractions, one representing the amount of physics majors expected and the amount of seniors expected in physics majors by the university.

$\frac{400x}{66} = \frac{400}{3600}$