LOG PROBLEM
What is the area of a circle with a radius of 5 centimeters? (SHOW FORMULA WORK and draw a picture!)
HOMEWORK for 706
1) What is the area of a circle with a radius of 3 centimeters?
2)What is the area of a circle with a radius of 4 meters?
HOMEWORK for 707
Problems 24 and 25 of the worksheet handed out today.
1/13/10
1/12/10
January 12th, 2010
ANNOUNCEMENT-Distributive Property Quiz Retake on WEDNESDAY!
LOG PROBLEM
Solve for b:
2(3b +4) + 2b = 24
HOMEWORK
Show the formula work for calculating the area of the circles with the following radii:
1)r=2cm
A=(pi) r^2
A=(3.14)(2^2)
A=(3.14)(4)
A=12.56cm^2
2)r=4in
3)r=3.2 m
4)r=8.6km
5)r=1.1mi
LOG PROBLEM
Solve for b:
2(3b +4) + 2b = 24
HOMEWORK
Show the formula work for calculating the area of the circles with the following radii:
1)r=2cm
A=(pi) r^2
A=(3.14)(2^2)
A=(3.14)(4)
A=12.56cm^2
2)r=4in
3)r=3.2 m
4)r=8.6km
5)r=1.1mi
1/10/10
January 11th, 2010
ANNOUNCEMENT-Distributive Property Quiz Retake on WEDNESDAY!
LOG PROBLEM
Solve for x:
2(x +3) +2x= 18
Solution
2(x +3) +2x= 18
2x+6+2x=18
4x+6=18
.....-6...-6
4x=12
/4.../4
x=3
HOMEWORK - First answer is given!
Solve for the variable:
a)
5(10 -y) -5y = 10
50 -5y - 5y = 10
50 - 10y = 10
-50..........-50
-10y = -40
/-10.../-10
y = 4
b)
6(z -1) -2z= 2
c)
3(2n + 4) - 2n = 16
d)
4(5k + 2) -10k= 22
e)
3(4 -x)-3x = 0
Distributive Property Quiz Answers
1)
2(3x+5)
6x + 10
2)
-3(-2+9x)
6-27x
3)
7(3+2x) - 5
21+14x-5
16+14x
4)
-2(9x-4)+2x
-18x+8+2x
-16x+8
5)
8(-4+9x)-9
-32+72x-9
-41+72x
6)
5(-7x-6)+8(4x+2)
-35x-30+32x+16
-3x-14
7)
-9(-2x-6)-3(7x-4)
18x+54-21x+12
-3x+66
8)
P=2(l+w)
P=2(6+7)
P=12+14
P=26cm
9)
P=2(l+w)
P=2(5+8)
P=10+16
P=26cm
10)
P=2(l+w)
P=2(9+5)
P=18+10
P=28cm
LOG PROBLEM
Solve for x:
2(x +3) +2x= 18
Solution
2(x +3) +2x= 18
2x+6+2x=18
4x+6=18
.....-6...-6
4x=12
/4.../4
x=3
HOMEWORK - First answer is given!
Solve for the variable:
a)
5(10 -y) -5y = 10
50 -5y - 5y = 10
50 - 10y = 10
-50..........-50
-10y = -40
/-10.../-10
y = 4
b)
6(z -1) -2z= 2
c)
3(2n + 4) - 2n = 16
d)
4(5k + 2) -10k= 22
e)
3(4 -x)-3x = 0
Distributive Property Quiz Answers
1)
2(3x+5)
6x + 10
2)
-3(-2+9x)
6-27x
3)
7(3+2x) - 5
21+14x-5
16+14x
4)
-2(9x-4)+2x
-18x+8+2x
-16x+8
5)
8(-4+9x)-9
-32+72x-9
-41+72x
6)
5(-7x-6)+8(4x+2)
-35x-30+32x+16
-3x-14
7)
-9(-2x-6)-3(7x-4)
18x+54-21x+12
-3x+66
8)
P=2(l+w)
P=2(6+7)
P=12+14
P=26cm
9)
P=2(l+w)
P=2(5+8)
P=10+16
P=26cm
10)
P=2(l+w)
P=2(9+5)
P=18+10
P=28cm
1/7/10
January 7th, 2010
ANNOUNCEMENT - QUIZ TOMORROW ON AREA OF RECTANGLES
LOG PROBLEM
Solve for x:
81 = 3x
Answers to yesterday's Homework for 706
6) l = 3.82
7) l = 3.98
8) l = 2.58
9) l = 4
10) l = 3.75
Answers to yesterday's Homework for 707
6) l = 2.8
7) l = 2.13
8) l = 7.35
9) l = 2.57
10) l = 2.76
HOMEWORK - PRACTICE QUIZ - Show formula work!
1. What is the perimeter and area of a rectangle that has a length of 3 cm and a width of 4 centimeters?
2.What is the perimeter and area of a rectangle that has a length of 2.1 cm and a width of 4.2 centimeters?
3. What is the perimeter and area of a rectangle that has a length of 24 cm and a width of 14 centimeters?
4. What is the perimeter and area of a rectangle that has a length of 83 cm and a width of 96 centimeters?
5. What is the perimeter and area of a rectangle that has a length of 43.8 cm and a width of 19.7 centimeters?
6. What is the width of a rectangle that has an area of 10 square centimeters and a length of 2 centimeters?
7. What is the width of a rectangle that has an area of 18 square centimeters and a length of 4 centimeters?
8. What is the width of a rectangle that has an area of 12.8 square centimeters and a length of 2.1 centimeters?
9. What is the width of a rectangle that has an area of 88 square centimeters and a length of 27 centimeters?
10. What is the width of a rectangle that has an area of 91.4 square centimeters and a length of 26.9 centimeters?
LOG PROBLEM
Solve for x:
81 = 3x
Answers to yesterday's Homework for 706
6) l = 3.82
7) l = 3.98
8) l = 2.58
9) l = 4
10) l = 3.75
Answers to yesterday's Homework for 707
6) l = 2.8
7) l = 2.13
8) l = 7.35
9) l = 2.57
10) l = 2.76
HOMEWORK - PRACTICE QUIZ - Show formula work!
1. What is the perimeter and area of a rectangle that has a length of 3 cm and a width of 4 centimeters?
2.What is the perimeter and area of a rectangle that has a length of 2.1 cm and a width of 4.2 centimeters?
3. What is the perimeter and area of a rectangle that has a length of 24 cm and a width of 14 centimeters?
4. What is the perimeter and area of a rectangle that has a length of 83 cm and a width of 96 centimeters?
5. What is the perimeter and area of a rectangle that has a length of 43.8 cm and a width of 19.7 centimeters?
6. What is the width of a rectangle that has an area of 10 square centimeters and a length of 2 centimeters?
7. What is the width of a rectangle that has an area of 18 square centimeters and a length of 4 centimeters?
8. What is the width of a rectangle that has an area of 12.8 square centimeters and a length of 2.1 centimeters?
9. What is the width of a rectangle that has an area of 88 square centimeters and a length of 27 centimeters?
10. What is the width of a rectangle that has an area of 91.4 square centimeters and a length of 26.9 centimeters?
1/6/10
January 6th, 2010
ANNOUNCEMENT! - Once again, there is a Quiz on Friday dealing with AREA and PERIMETER of rectangles.
LOG PROBLEM
What is the length of a rectangle that has a width of 6 centimeters and an area of 38 centimeters squared? SHOW FORMULA WORK.
CLASSWORK
Draw a rectangle. Measure the length and width in inches. Show formula work for the area and perimeter.
Answers to HOMEWORK for January 5th.
1) l =14 cm
2) l =4.17 cm
3) l =3.63 cm
4) l =2.5 cm
5) l =1.27 cm
HOMEWORK FOR 706
Calculate the length for the dimensions of each rectangle. SHOW FORMULA WORK!
6) A=4.2 in^2, w = 1.1
7) A=39.8 cm^2, w = 10cm
8) A=17.3 cm^2, w = 6.7cm
9) A=8.4 cm^2, w = 2.1cm
10) A=3 cm^2, w = 0.8cm
HOMEWORK FOR 707
Calculate the length for the dimensions of each rectangle. SHOW FORMULA WORK!
6) A=14.3 in^2, w = 5.1 in
7) A=19.8 cm^2, w = 9.3cm
8) A=27.2 cm^2, w = 3.7cm
9) A=82.4 cm^2, w = 32.1cm
10) A=63 cm^2, w = 22.8cm
LOG PROBLEM
What is the length of a rectangle that has a width of 6 centimeters and an area of 38 centimeters squared? SHOW FORMULA WORK.
CLASSWORK
Draw a rectangle. Measure the length and width in inches. Show formula work for the area and perimeter.
Answers to HOMEWORK for January 5th.
1) l =14 cm
2) l =4.17 cm
3) l =3.63 cm
4) l =2.5 cm
5) l =1.27 cm
HOMEWORK FOR 706
Calculate the length for the dimensions of each rectangle. SHOW FORMULA WORK!
6) A=4.2 in^2, w = 1.1
7) A=39.8 cm^2, w = 10cm
8) A=17.3 cm^2, w = 6.7cm
9) A=8.4 cm^2, w = 2.1cm
10) A=3 cm^2, w = 0.8cm
HOMEWORK FOR 707
Calculate the length for the dimensions of each rectangle. SHOW FORMULA WORK!
6) A=14.3 in^2, w = 5.1 in
7) A=19.8 cm^2, w = 9.3cm
8) A=27.2 cm^2, w = 3.7cm
9) A=82.4 cm^2, w = 32.1cm
10) A=63 cm^2, w = 22.8cm
1/4/10
January 5th, 2010
ANNOUNCEMENT: QUIZ FRIDAY ON PERIMETER AND AREA
LOG PROBLEM
3x + 9 = 17.2
CLASSWORK
1. Draw a rectangle. Use your ruler and the formulas to calculate the PERIMETER and the AREA.
2. Check your Homework
Answers to Problems 1-13 for January 4th:
2) l = 3.22 cm
3) l = 5.35 cm
4) l =2.92 cm
5) l =20.86 cm
6) l =4.53 cm
7) l =5 cm
8) l =2.25 cm
9) l =34.82 cm
10) l =2.93 cm
11) l =4.97 cm
12) l =4.12 cm
13) l =5.06 cm
HOMEWORK
1) A=32.2 cm^2, w = 2.3cm
2) A=45.9 cm^2, w = 11cm
3) A=33 cm^2, w = 9.1cm
4) A=21 cm^2, w = 8.4cm
5) A=11.42 cm^2, w = 9cm
LOG PROBLEM
3x + 9 = 17.2
CLASSWORK
1. Draw a rectangle. Use your ruler and the formulas to calculate the PERIMETER and the AREA.
2. Check your Homework
Answers to Problems 1-13 for January 4th:
2) l = 3.22 cm
3) l = 5.35 cm
4) l =2.92 cm
5) l =20.86 cm
6) l =4.53 cm
7) l =5 cm
8) l =2.25 cm
9) l =34.82 cm
10) l =2.93 cm
11) l =4.97 cm
12) l =4.12 cm
13) l =5.06 cm
HOMEWORK
1) A=32.2 cm^2, w = 2.3cm
2) A=45.9 cm^2, w = 11cm
3) A=33 cm^2, w = 9.1cm
4) A=21 cm^2, w = 8.4cm
5) A=11.42 cm^2, w = 9cm
1/3/10
January 4th, 2010
LOG PROBLEM
Solve for x:
2x + 3 = 12
Solution:
1)2x+3 = 12
.......-3 .....-3
2)2x = 9
.../2 .. /2
3) x = 4.5
WORK TODAY
Area of Rectangles
1. What is the length of a rectangle that has a width of 10.2 centimeters and an area of 40.6 centimeters squared? SHOW FORMULA WORK and make a sketch.
Solution:
a = lw
40.6 = l(10.2)
/10.2..../10.2
3.12 cm = l
Rectangle dimensions: Find the length.
2. Area = 13.2 cm^2 , w = 4.1 cm
3. Area = 122 cm^2 , w = 22.8 cm
4. Area = 654 cm^2 , w = 224.1 cm
5. Area = 200.3 cm^2 , w = 9.6 cm
6. Area = 65.2 cm^2 , w = 14.4 cm
7. Area = 11.5 cm^2 , w = 2.3 cm
8. Area = 42.9 cm^2 , w = 19.1 cm
9. Area = 839.2 cm^2 , w = 24.1 cm
10. Area = 88.2 cm^2 , w = 30.1 cm
HOMEWORK
Rectangle dimensions: Find the length.
11. Area = 493 cm^2 , w = 99.1 cm
12. Area = 89.5 cm^2 , w = 21.8 cm
13. Area = 18.2 cm^2 , w = 3.6 cm
Solve for x:
2x + 3 = 12
Solution:
1)2x+3 = 12
.......-3 .....-3
2)2x = 9
.../2 .. /2
3) x = 4.5
WORK TODAY
Area of Rectangles
1. What is the length of a rectangle that has a width of 10.2 centimeters and an area of 40.6 centimeters squared? SHOW FORMULA WORK and make a sketch.
Solution:
a = lw
40.6 = l(10.2)
/10.2..../10.2
3.12 cm = l
Rectangle dimensions: Find the length.
2. Area = 13.2 cm^2 , w = 4.1 cm
3. Area = 122 cm^2 , w = 22.8 cm
4. Area = 654 cm^2 , w = 224.1 cm
5. Area = 200.3 cm^2 , w = 9.6 cm
6. Area = 65.2 cm^2 , w = 14.4 cm
7. Area = 11.5 cm^2 , w = 2.3 cm
8. Area = 42.9 cm^2 , w = 19.1 cm
9. Area = 839.2 cm^2 , w = 24.1 cm
10. Area = 88.2 cm^2 , w = 30.1 cm
HOMEWORK
Rectangle dimensions: Find the length.
11. Area = 493 cm^2 , w = 99.1 cm
12. Area = 89.5 cm^2 , w = 21.8 cm
13. Area = 18.2 cm^2 , w = 3.6 cm
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