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pentagon [3]
3 years ago
5

How to tell if an equation is a function or not

Mathematics
1 answer:
Kay [80]3 years ago
5 0
You can tell an equation is a function<span> because every element in the domain has only 1 element in the range

For instance, lets take this set. (2,3)(4,5)(6,7)
The domain is 2,4,6 and our range is 3,5,7 for ever range there is only one unique range that goes with it.

Now, lets take this set. (2,4)(2,4)(3,5)
Here our domain is 2,2,5 and our range is  4,4,5
Here we can see that both 2 points to 4 so this is not a function. </span>
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If the ratio of wiping is the green peas is 2 to 8 and there are a total of 30 pens how many pens are white
kaheart [24]
2x+8x=30. x= #of pens

10x=30. combine like terms

x=3. divide by 10 to isolate (get by itself) x

2(3)=6. the # of white pens are represented by 2x

6 white pens



hope this helped!
8 0
3 years ago
Write the equation in standard form for the circle with center (0, -1) and radius 10.
BARSIC [14]

Answer:

x^2 + (y+1)^2 = 10^2

Step-by-step explanation:

Centre (p,q) = (0, -1)

radius, r = 10

General Equation of a circle

(x-p)^2 + (y-q)^2 = r^2

(x-0)^2 + (y- -1)^2 = 10^2

x^2 + (y+1)^2 = 10^2

7 0
3 years ago
The Miller family bought 4 crates of eggs last week. Each crate had 18 eggs. Since then, they have eaten 27 of the eggs. How man
Varvara68 [4.7K]

Answer:

45 eggs left

Step-by-step explanation:

if they had 4 crates and each crate has 18, then we have a total of 72 eggs

subtract 27 eaten eggs from 72

72-27=45

they have 45 eggs left

4 0
3 years ago
Read 2 more answers
Solve the system equations. <br> X+2y=0<br> 10y=-5
nexus9112 [7]

Answer:

x=1

y=-1/2

Step-by-step explanation:

x+2y=0....(1)

10y=-5.....(2)

From (2) we can find y.

y=-5/10

y=-1/2

Use that in (1)

x+2*(-1/2)=0

x-1=0

x=1

5 0
3 years ago
If a parabola’s focus is at (1,1) and directrix is at y = 7, what is the standard form of the equation representing this parabol
inysia [295]
<span>y=1/12(x-1)2<span>+4

attached is a file/ picture i made in google images of a graph of it, i explain the steps as well.
id appreciate a brainliest since the drawing took a good 15 minutes but its up to you! Hope i helped.</span></span>

4 0
3 years ago
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