Dear Period 5 Class... THE RUMOR IS CONFIRMED!! I am postponing tomorrow's test until Tuesday... I still expect you to be doing the review problems... be ready for an INTENSIVE review session tomorrow... this is a GIFT... make full use of it. Oh, and spread the good news to your non-blogging friends. Thanks... Mr. C.
... Rates, Ratios, Proportions& Percent Problems (Oh My!)
ask all question here, INCLUDING section #2-5 Literal Equations...
pg 152-157 Chapter Review and Chapter Test\
#1-5 All & REVIEW VOCAB, YOU SHOULD BE FAMILIAR WITH ALL!!
Suggested HW #7-63 Odd
Minimum HW #7-63 every 4th from #7, i.e. 7,11,15,etc.
You should look at every problem and feel comfortable with a first step, including the Chapter Test on pg 157.
Uncomfortable? Ask questions in class or on the blog... GOOD LUCK!!
Should we skip sec 2-5 on the chapter review or should we read the lesson in the book and do the problems?
ReplyDeleteI am having trouble on pg 155 #43.
ReplyDeleteskip 2-5 for now... your test isn't until Friday and the lesson is tomorrow
ReplyDeleteok, so #43 says that asks how many seconds does it take for a baseball traveling at 90 mph to travel 60ft?
ReplyDeleteThink. Articulate. What would have made this problem EASIER to handle? It would be MUCH EASIER if you knew the speed of the ball in feet per sec, right?
IF you knew this, you could simply set up a proportion, right? Let's say the speed of the ball was 40ft/sec. You could set up the proportion 40/1 = 60/x and then SIMPLY use our new favorite tool, the cross-product property.
Well, you SHOULD know how to convert miles per hour into feet per second, yes?
If not [our target is an answer in feet per sec, which we know as feet OVER seconds... we start with miles OVER hours, right? So which conversion rates do we need? and how do we have to align them as BIG PHAT ONES? YOU KNOW THIS!!]
Now we gotsk feet per second, and all you gotsk to do is set up a proportion similar to the one specified above... ca-peeesh??
How would I solve #15 and #18 (heres the problem)5x=-4y+4; x=1,2,3 on page 112? I get # 12 but when the variable im trying to solve is by itself what the first step I didnt find help in the example problem because it was structured differently Help please?????
ReplyDeleteThe homework on pg 112 is NOT due until Wednesday... we will be doing the lesson tomorrow... SLOW DOWN!!
ReplyDeleteOk, so are #15 & 18 any better now... after the lesson??
ReplyDeleteI'm confued on page 112 with problem 12. i know we did this in class, but it still doesnt make sense!!
ReplyDeleteI will be in my classroom tomorrow morning at 7:15am and AGAIN at 2:30-4:00pm for extra help, IF NEEDED.
ReplyDeleteI'd love to see some ARTICULATED questions on the blog... in other words, what did you try as a first step?
OK, pg 112 #12
ReplyDelete2y+4x=8
so, we want to SOLVE FOR y, right?
therefore we want to ISOLATE y, right?
therefore we need to know who/what is bothering y, right?
I see 4x and 2, would you agree?
Let's subtract 4x (that's Evan in disguise)
so now we have
2y=8-4x
What's bothering y now... just the 2, right?
so, y=(8-4x)/2 (read/write that as OVER 2, ok?)
for now, that solution would be acceptable, but you should recognize that since BOTH 8 and 4x are divisible by 2, we COULD simplify the answer to:
y=4-2x or y=-2x+4
For the second part of the question, you just PLUG IN the specific values for x to get some sample values for y.
Ca-peesh??
I'm confused on section 2-5 #21 on pg.112 on how to solve it. I tried dividing both sides by r+s but it didn't come ou to the right answer which is t over r+s. What happened to the 1!!!
ReplyDeletehow do you solve a ration like in problem #2 on pg 158? i got the answer but is there a formula that works every time?
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteI don't get how to put #'s 18,19, or 21, on pg 160, in a grid.
ReplyDeleteGridded response is a term that refers to standardized testing and how answers are recorded... JUST IGNORE IT and do the algebra!
ReplyDeletepg 158 #2 is a little tricky because you have to figure out part vs. whole. If the ratio of string players to wind players is 2:5, that means that 2 out of 7 prefer string and 5 out of 7 prefer wind. The number 7 was never mentioned, but IT IS THE WHOLE. So 2/7 = x/28...
ReplyDeleteCa-peeesh?
I thought a grid was a table. Haha.
ReplyDeleteThanks Mr. C
Yup... you weren't the only one confused by that!
ReplyDelete