Friday, October 19, 2012

Aim: How do we work with ratios and proportions?


8 comments:

Anonymous said...

1a. is 1/2
1b. is 1/1
2a. is 2;1
2b. is 1;3
2c. is 5;4
2d. is 6;1
3. is 15;9
4. is a,c,d
5. is 20;36 not sure
6. not sure
7a. x=90
7b. x=3

Anonymous said...

Dan Zhang
Hw Even number
2. a) 2 to 1
b) 1 to 3
c) 5 to 4
d) 6 to 1
4. choice a 12/16, c)9/12, d)24/32
6. 48
8. 30, 45
10. 20
12. 0.15
14. 50

riveka said...

2.
a)48to28
48 48:24
28
b)80to240
80 80:240
240
c)5to4
5 5:4
4
d)72to12
72 72:12
12
4.a)12
16
c)9
12
d)24
32
6. 7x+8x=90
15x=90
x=6
8. 2x+3x=1x+2x+30
5x=30+3x
2x=30
x=15
10. 500 = x
25 1 25x=500
x=20
12.15 = 1
100 x 100x=15
x=6.7
14.5x+3x=80
x=10

Anonymous said...

KIRAN DASARI

2.a)6 to 3
2.b)1 to 3
2.c)5 to 4
2.d)6 to 1

4.a)12/16
c)9/12
d)24/32

6.42/48----(42+48=90)---48

8.i didn't get it

10.20 booke in a box

12.3/20 seconds

14.50/30 = 50.

Anonymous said...

Mr. Napoli, this is for Tuesday's homework

1) answer 4
2) ?
3) answer 1
4) 5x²-3x+2
-3x2+4x+1
_________-
8x²-7x+3

5) 5x²+3xy+6y²
4x²-3xy-2y²
__________-
9x²+6xy+8y²

7) x=c+b
______
a


8)24=12+3y
12=3y
y=4

9)2x=3x+6-26
-3x
-x=6-26
-x=-20 x=20,22

10)x+x+2+x+4+x+6=296
4x+12=296
-12
4x=284
x=71,73,75,77

11)x=-19,-18,-17

12)3x+12-x=18
2x+12=18
-12 12
x=8

13)x=p-6
_____
3y

14)x=6

15)5x+7=-2
3x=-9
x=-3

16)8x=2(x+15)
6x=30
x=5

17)2a

18)x²-2x+1

19)-24) answers on the sheet

thankyou Mr.Napoli

Anonymous said...

HW of Tuesday
Michelle Chue Period 9
1) 3)a+b=b+a property of addition

2)Answer:2)x 1/x, x=0 reciprocal flip the fraction

3) addictive inverse property of a-b. Addictive inverse is a+(-a)=0. Answer: 2) -a+b

4) Sum of 5x-3x+2 & 3x square - 4x-1
5x square - 3x+2
+3x square-4x-1
8x square-7x-1: Answer

5)From 5x squared+3xy+6y squared subtract
4x squared+3xy+2y square

5x squared + 3xy+6y square
+(-4x square -3xy-2y square)
Answer:-x squared+4y square

6) 5x square+ 2x-3+-2x+3x-7
3x squared+5x-10

7)ax-b=c
+b
ax=c+b x=c+b/a

8) 24=12+3y
-12 -12
12=3y
12/3=3y/3
4=y

9) 2x=3(x+2)-26
2x=3x+6-26
-3x= -3x-20
-x=-20 x=20 Answers: x=20 & x+2=22

10) x+x+2+x+4+x+6
4x+12=296
-12 = -12
4x = 284 x=71
Answers: x=71, x+2=73,x+4=75,x+6=77

11) x+x+1+x+2=-54
3x+3=-54
-3 -3
3x=-57 x=-19
Answers: x=-19, x+1=-18, x+2= -17

12) 3x+12-x=18
2x+12=18
-12= -12
2x = 6 Answer: x= 3

13) 3xy+9=p+3-9
-9
3xy=p+3-9
x=p-6/3y

14) 4(x-1)-3=17
4x-4-3=17
4x-7=17
+7 +7
4x=24 Answer: x=6

15) 5x+7=2x-2
-2x -2x
3x+7=-2
-7 -7
3x=-9 Answer: x=-3

16) 8x=2(x+15)
8x=2x+30
-2x -2x
6x=30 Answer: x=6

17) 3a+b+-a-b
Answer: 2a

18) 2x square - 3x - 5 subtract x square - x -6
2x square-3x-5
+(-x square+x+6)
Answer: x square -3x+1

19) 10y-7
+(-8y+2)
Answer: 2y-5

20) 3x square + 3+4x-4
Answer: 3x square + 7x-4

21) 3(a+2)=(5)(12)
3a+6 =60
-6 -6
3a= 54 Answer: a=18

22) 2(x+1)=(1)(8)
2x+2 =8
-2 -2
2x=6 Answer: x=3

23) 3/2 = x/24
2x=72 Answer: 36

24) 5x+6x=66
11x=66 x= 6 Answer: 36

5(6) = 30 small 6(6)= 36 larger

Anonymous said...

1)4
2)?
3)2
4)(5x²-3x+2)+(3x²-4x-1)
8x²-7x+1
5)(5x²+3xy+6y²)-(4x²+3xy+2y²)
(5x²+3xy+6y²)+(-4x²-3xy-2y²)
x²+4y²
8)24=12-6y+9y
24=12+3y
-12-12
12=3y
/3 /3
y=4
14)4(x-1)-3=17
4x-7=17
+7 +7
4x=24
/4 /4
x=6
15)5x+7=2x-2
-7 -7
5x=2x-9
-2x-2x
3x=-9
/3 /3
x=-3
16)8x=2(x+15)
8x=2x+30
-2x-2x
6x=30
/6 /6
x=5
20)3x(x+1)+4(x-1)
3x²+3x+4x-4
3x²+7x-4

Posted by Gabriella Vera.

Anonymous said...

Shalva Khiskiadze 10/10/08 answeres #11 x= x+1= x+2= 3x+3=-54 =3x=57= x=-19 x+1=-18 x+2=-17