Hello!

A function is that y only has 1 solution for every x

-3x + 8 = y is a function because it only has one y value for every x

y = x^2 + 3 is a function because it has only one y value for every x

y^2 = x is not a function because it has two y values for x = 4

Hope this helps!

4 0

3 years ago

Write a system of equation.

Alecsey [184]

Luis spent $9.50, in which:

Candy (y) = $1.25

Chips (x) = $0.50

$9.50 = 1.25y + 0.50x

Luis bought 10 snacks in all

10 = x + y

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You're answer:

x + y = 10

1.25y + 0.50x = 9.50

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hope this helps

7 0

3 years ago

Isabella spends $4.87 on paintbrushes and paint. How many of each item does she buy? Explain how you found your answer. Paint br

Lelechka [254]

The complete question in the attached figure

Let
x-----------------> number of paintbrushes----------- > $0.95 each
y---------------- > number of jar of paint-------------- > $0.99 each

we know that
0.95x+0.99y = $4.87

using a graph tool

the solution will be a pair of coordinates that are whole numbers -- > see the attached figure

the solution is the point (2,3)

x=2---------------------- > number of paintbrushes
y=3---------------------- > number of jar of paint

the answer is
number of paintbrushes=2
number of jar of paint=3

8 0

3 years ago