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3 years ago

Which expression has a value of 15 when n = 7? 43 - 5n 3n - 5 6n - 28 19 - 28/n

Mathematics

2 answers:

cupoosta [38]3 years ago

8 0

19 - 28/n
n=7
19 - 28/7
19 - 4
=15

Leya [2.2K]3 years ago

5 0

Answer:

$19-\frac{28}{n}\text{has a value of 15 when n=7}$

Step-by-step explanation:

Given the following expressions

we have to choose the expression which has a value 15 when n is 7

Option 1: 43-5n

Put n=7,

$43-5(7)=43-35=8$

Option 2: 3n - 5

$3(7)-5=21-5=16$

Option 3: 6n-28

$6(7)-28=42-28=14$

Option 4: $19-\frac{28}{n}$

$19-\frac{28}{7}=19-4-15$

$\text{Hence, }19-\frac{28}{n}\text{has a value of 15 when n=7}$

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