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melomori [17]
3 years ago
12

Simplify 3(a+5);a=12

Mathematics
1 answer:
nasty-shy [4]3 years ago
6 0

Answer:

Step-by-step explanation:

what we know: a=12

3(a+5)

and so if a is 12, in order to solve this equation we are going to substitute a for 12- meaning this:

3(12+5)

then, you are gonna solve that.

parenthases means to multiply and so 3*12=36 3*5=15  36+15=51.

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The number of videos will be 3 and the number of CDs will be 2.

<h3>What is an expression?</h3>

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that Christine went shopping and bought each of her five nephews a gift, either a video costing $14.95 or a CD costing $16.88. She spent $78.61 on the gifts.

The number of the videos and CD will be calculated by forming an equation:-

14.95x + 16.88y = 78.61

From heat and trial, we put x = 3 and y = 2 then calculate.

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Therefore, the number of videos will be 3 and the number of CDs will be 2.

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