The proportion that could be used to solve for the variable is:
; p = 12 ⇒ b
Step-by-step explanation:
Direct proportion means that two (or more) quantities increase or decrease in the same ratio
- y = k x is the equation of direct proportion, where k is the constant of proportionality
is the another way to write a proportion
The number of pencils and the cost of them is increased together or decreased together
∴ The number of the pencils and their costs are in direct proportion
- By using the 2nd rule above
∵ The cost of the 7 pencils is $1.68
∵ The cost of p pencils is $2.88
∴ 
The proportion that could be used to solve for the variable is: 
∵ 
- By using cross multiplication
∴ p × 1.68 = 7 × 2.88
∴ 1.68 p = 20.16
- Divide both sides by 1.68
∴ p = 12
The value of variable p is 12
Learn more:
You can learn more about the proportion in brainly.com/question/10708697
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0.77(13.50×40)= 415.8
The answer is $415.8
Hope this helps :)
The converse of a logicalstatement is a s tatement formed by reversing the parts of the statement.
For example, the logical statement "A implies B" has a converse of "B implies A"
The linear pairs theorem states that "<span>if two angles form a linear pair, then they are supplementary".</span>
The converse of the linear pairs theorem is therefore, "if two angles are suplementary, then they form a linear pair".
Hope this helps you If you need any more help let me know in the comments