OpenStudy (anonymous):

Simplify 6(2r − 5) + 2r a 4r − 30 b 4r + 30 c 14 r − 30 d 12 r − 30

4 years ago
OpenStudy (ny,ny):

6(2r-5) +2r 12r-30+2r 14r-30

4 years ago
OpenStudy (anonymous):

okay thank you... can you help me with this one? Your Math class has 32 students. You would like to treat the class to cookies. You would like each person to have 5 cookies. Which expression would be a quick way to figure out how many cookies you would need to bake? a 5(32 + 2) b 5(30 + 2) c 5(32 − 2) d 5(30 − 2)

4 years ago
OpenStudy (anonymous):

is it b?

4 years ago
OpenStudy (ny,ny):

hmm. to me the easiest way to do this is 32 x 5. which is 160. i also thought it was b but when i simplified i get 152.

4 years ago
OpenStudy (anonymous):

Can I help here?

4 years ago
OpenStudy (ny,ny):

yeah go ahead.

4 years ago
OpenStudy (anonymous):

what are you guys stuck on?

4 years ago
OpenStudy (mathstudent55):

b is correct. 5(30 + 2) = 5(32) = 160

4 years ago
OpenStudy (ny,ny):

OMG IM SO STUPID.

4 years ago
OpenStudy (anonymous):

to check to see take the orgainal problem and times the 32 to 5 and see if you get 160

4 years ago
OpenStudy (anonymous):

so yes b is correct

4 years ago
OpenStudy (mathstudent55):

You can also do it using the distributive property: 5(30 + 2) = 5(30) + 5(2) = 150 + 10 = 160

4 years ago
OpenStudy (anonymous):

that is the other way too.. :)

4 years ago
OpenStudy (anonymous):

thanks guys appreciate it

4 years ago
OpenStudy (anonymous):

not a problem and have a good night or day wherever you are..

4 years ago
OpenStudy (ny,ny):

night :P

4 years ago
OpenStudy (anonymous):

Hey NY NY I am now your fan :)

4 years ago
OpenStudy (ny,ny):

me too :)

4 years ago