Answer:
the answer is the first option.
Step-by-step explanation:
A) {(1, 3), (2, 6), (3, 9), (4, 12)} - Yes, all input-outputs are unique
B) {(1,4), (1, 3), (1, 2), (1, 1) - No, repeat inputs (1)
C) {(3, 4), (2, 4), (5, 1), (3,5)} - No, repeat inputs (3)
D) {(3, 4), (3, 3), (1, 2), (1,5)} - No, repeat inputs (1 and 3)
let $p, $c and $d represents the costs of popcorn, candy and a drink respectively. If the popcorn was three times as expensive as the candy then;
p = 3c.... 1
If the drink was twice as expensive as the candy then d = 2c .... 2
If Eva spent a total sum of $10.50 at the movies, the equation that represents the situation will be p + c + d = $10.50 .... 3
Substituting equation 1 and 2 into 3;
3c + c + 2c = $10.50
6c = $10.50
<em>Hence the equation to represent the situation is 6c = $10.50 where c represents the cost of the candy.</em>
<em></em>
b) To get c from the equation 6c = $10.50, we will simply divide both sides by the coefficient of c i.e 6 as shown
6c/6 = $10.50/6
c = $1.75
<em>Hence the value of c is $1.75</em>
<em>c) </em>The equation representing Eva's drink in terms of the candy is expressed as d = 2c
Substituting c = $1.75 into the equation will give;
d = 2(1.75)
d = 3.5
<em>Hence the cost of Eva's drink is $3.50</em>
Answer: We can't even see the whole picture my dude
The answer is D. and E.
-3
12-3√25
-3•5=-15
12-15=-3
i think a.... sorry if im wrong
