Ask your own question, for FREE!
Mathematics 23 Online
OpenStudy (niahloves):

Which math expression represents the phrase? 9 times the sum of a number and 7 A. 9 · n + 7 B. 9 · (n + 7) C. 9 · (n – 7) D. 9 · (n · 7

OpenStudy (welshfella):

which one do you think it is?

OpenStudy (jameshorton):

it d

OpenStudy (welshfella):

note that the number is added to 7 first before the multiply

OpenStudy (anonymous):

A

OpenStudy (welshfella):

@jameshorten plz dont just give the answer

OpenStudy (jameshorton):

yes sir or mam

OpenStudy (welshfella):

d is wrong

OpenStudy (jameshorton):

no it not

OpenStudy (jameshorton):

who ask the question

OpenStudy (jameshorton):

help me on mines

OpenStudy (welshfella):

Its not A because the multiplication is done first in A

OpenStudy (welshfella):

when you have something in parentheses ( and ) that calculation is done first

OpenStudy (welshfella):

so if i for example had to compute 3* (4 + 7) i would do the 4+7 first then multiply by 3

OpenStudy (niahloves):

so what is it

OpenStudy (welshfella):

the question says' 9 times the sum of a number and 7' - this means the x + 7 will be calculated first therefore x + 7 goes into parentheses so which one is it?

OpenStudy (niahloves):

c

OpenStudy (welshfella):

they have n not x That doesnt matter

OpenStudy (niahloves):

is it right or wrong

OpenStudy (welshfella):

why C? that has (x - 7) not (x + 7) sum = +

OpenStudy (welshfella):

take another look

OpenStudy (niahloves):

o b

OpenStudy (welshfella):

right |dw:1441131763685:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!