Answer:
1. Function
2. Not a function
3. Function
4. Not a function
Step-by-step explanation:
A function just means that for each input it outputs only 1 output. This output isn't necessarily unique. So for example if you're just given: f(2) = 3 and f(1) = 3, this is a function since each input only outputs 1 value, even though the output isn't unique, but if you're given: f(3) = 2, f(2) = 1, f(3) = 3. that's not a function since f(3) outputs both 2 and 3.
Anyways now that you hopefully understand this, let's look at each image.
Relation 1: (Function)
So for each input (the domain) it's only pointing to one output (range), even if multiple input (the domain) are pointing to the same output (the range), it's still a function.
Relation 2: (Not a function)
This is not a function, since if you look at the input 7 (the range), you'll see it outputs two things (range). It outputs -6 and -7. So this is not a function
Relation 3: (Function)
This is a function since each x-value (input) has only one y-value (output). So it's a function
Relation 4: (Not a functio)
This is not a function, since there are multiply coordinates with the same x-coordinate (input) and different y-coordinates (output). The x-coordinate 2 has the output b, y, and m, and since no value is given for these variables, it can be assumed they're different values, thus it's not a function.
Problem: 90 x 83
<span>
In distributive property: 90 x (80 + 3) </span>
<span>
Solution: 80 + 3 = 83.
</span>
Solution: 83 x 90 = 7470
Happy studying ^-^
Given:
Total amount of Mingfa and her sister = $130
If Mingfa amount increased by $10, then the new amount is equal to three times of as much money as her sister.
To find:
How much money does Mingfa actually have?
Solution:
Let, Mingfa have $x and her sister has $y initially. Then,
...(i)
If Mingfa amount increased by $10, then the new amount is equal to three times of as much money as her sister.
...(ii)
Substitute the value of x from (ii) in (i).
Divide both sides by 4.
Putting in (i), we get
Therefore, Mingfa have $95.
Answer:
a₁ = -28
aₙ = a₁ + 12 (n-1)
Step-by-step explanation:
a₁ = -28
a₂ = -28 + 12 (2 - 1) = -16
a₃ = -28 + 12 (3 - 1) = -4
a₄ = -28 + 12 (4 - 1) = 8
aₙ = a₁ + 12 (n-1)
Answer:
w = 19
Step-by-step explanation:
to evaluate for the value of x in the expression 20 = w + 1 is very simple and direct, just look for a way to make w stand alone , that is look for a way to express w in terms 20 and 1
solution
20 = w + 1
collect the like terms
20 -1 = w
19 = w
w = 19
therefore the value of w in the expression 20 = w + 1 is evaluted to be 19
