5/6 + 3/7 Please Help thanks
1 answer:
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The <em>correct answers</em> are:
B) $25; and
D) $50.
Explanation:
Eric got a 20% discount. This means he paid 100%-20% = 80% of the retail value.
Let C represent the cost of CDs and S represent the cost of sweatshirts. For Eric's purchase, we have the equation:
0.8(3C+S) = 100
Using the distributive property, we have
0.8(3C) + 0.8(S) = 100
2.4C + 0.8S = 100
Neil got a 40% discount; this means he paid 100%-40% = 60% of the retail value. We have the following equation for him:
0.6(4C+2S) = 120
Using the distributive property, we have:
0.6(4C)+0.6(2S) = 120
2.4C + 1.2S = 120
This gives us the system:
Since the coefficient of C is the same in each equation, we will eliminate this variable. We do this by subtracting the equations:
We divide both sides by -0.4:
-0.4S/-0.4 = -20/-0.4
S = 50
Each sweatshirt is $50.
We will substitute this into the first equation:
2.4C+0.8(50) = 100
2.4C + 40 = 100
Subtract 40 from each side:
2.4C+40-40 = 100-40
2.4C = 60
Divide each side by 2.4:
2.4C/2.4 = 60/2.4
C = 25
Each CD is $25.
Answer:
a) {(3,3),(3,4),(4,5),(4,6)}
Step-by-step explanation:
Given
(a) to (d)
Required
Which is not a function
A relation is represented as:
For the relation t be a relation, then:
where
This means that none of the x values must be related.
The first relation has 3 repeated as its value of . Hence, (a) is a relation
Answer:
<h3>a. Give an example for which Arial's claim is true.</h3>If linear relations have equal coefficient about the independent variable, then those linear relations are parallel. For example, and
.
Notice that the coefficient of the dependent variable must be also equal, otherwise it would change the slope of the expression and they wouldn't be parallel.
<h3>b. Give an example for which Arial's claim is false. </h3>The statement is not false.
<h3>c. Suggest an improvement to Arial's claim.</h3>An improvemente would be that the constant term no need to be equal too, between linear relations, because they can be at "differecent heights", sort of speak.