I am doing a practice sheet for math so i can study but I am stuck on these problems can anyone who is a whiz in math help me please. solve 2/3+4/6, What would be the radius of a circle with a diameter of 8 inches? what is the perimeter of a triangle which sides measures 6,8, and 10 inches? A cube measures 3 inches on all of it's sides. What is it's volume in inches? Robert bought a used car for $1,500.00 If sales tax is 5% what is the total robert will have to pay for the car? What was the average score of all four bowlers if their scores were 132,140,145,128. I have been at this for 8 hours and cant seem to get my head on straight. Please help me.
2006-10-31 18:39:25 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
That's quite a set of questions! I'll answer all the questions one by one:
Answer 1:
Length = 10 feet
Width = 12 feet
Area = Length*Width
= 10*12
= 120 square feet (Never forget to put unit;it costs marks)
Answer 2:
2X+3=9
2X = 9-3
2X = 6
X = 6/2
X = 3
Answer 3:
2/3+4/6 = 4/6 + 4/6 (Make the denominators equal)
= (4+4)/6
= 8/6
= 4/3
Answer 4:
Diamter of circle = 8 inches
Radius = Diameter/2
= 8/2
= 4inches
Answer 5:
Perimeter = Sum of all the sides
= 6+8+10
= 24 inches
Answer 6:
Side = 3 inches
Volume of a cube = (Side)^3
= 3^3
= 27 cubic inches
Answer 7:
Marked Price = $1,500
ST rate = 5%
Sales Tax = (5*1500)/100
= 7500/100
= $75
Sales Price = Marked Price + Sales Tax
= $1500 + 75
= $1575
Answer 8:
Observations:132,140,145,128
Average = (Sum of all observations)/(Number of observations)
= (132+140+145+128)/4
= 545/4
= 136.25
2006-10-31 22:14:45 · answer #1 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
Area of a Rectangle Formula
A =LW
12 x 10 = 120
The answer is 120 feet equals the area.
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2x + 3 = 9
2x + 3 - 3 = 9 - 3
2x = 6
2x/2 = 6/2
x = 3
The answer is x = 3
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2/3 + 4/6
Simplify 4/6 = 2/3
2/3 + 2/3
4/3
The answer is 4/3
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What is the radius of a circle with a diameter of 8 inches
Radius = 1/2(8) = 4Inches
The answer is radius = 4 inches
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Wis the perimeter of a Triangle which sides measure 6, 8, and 10 inches
The perimeter is the sum of the sides
6 + 8 + 10 = 24 Inches
The answer is: the perimeter equals 24 inches
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Cube = LWH
3³ = 27 Inches
The answer is: the cube equals 27 inches
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1500 x 0.005 = 75
1500 + 75 = 1575 dollars
The answer ii: the total cost $ 1575 Dollars
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132, 140, 145, 128 = 545
545 / 4 = 136.25
The average score is 136.25
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2006-10-31 22:49:57 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
area of a rectangle is length x width , so
12 x 10 = 120
solve 2x+3=9 for x, take 3 from both sides
2x = 6 now divide by 2 on both sides
x = 3
solve 2/3+4/6 you need a common denominator which will be 6
so change 2/3 into ?/6
(2/3)(2/2) = 4/6
4/6+4/6 = 8/6 get into lowest terms (8/2)/(6/2) = 4/3
radius = 1/2 diameter, so
(1/2)(8) = 4
perimeter = side a + side b + side c, so
p= 6 + 8 + 10
p = 24 inches
volume of a cube = l w h
volume = 3x3x3
volume = 27 inches^3
1,500 at 5%
x/$1,500 = 5/100, so cross multiply
100x = 7500 divide both side by 100, so
x = $75.00 then add it to $1,500, so
Robert will have to pay a total of $1,575 for the car.
Add all four numbers up and divide by 4
132 + 140 + 145 + 128 = 545 now divide by 4
545/4 = 136.25
The average score of the four bowlers is 136.
2006-10-31 19:51:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Area = 12*10=120 feet squared
2X+3 = 9; subtract 3 from both sides that leaves 2X=6; divide by 2 and X= 3
2/3 + 4/6 = 8/6
radius is half the diameter so 4 inches
perimeter is all sides added together = 24 inches
Volume= side*side*side = 3*3*3 = 27 inches cubed
tax = .05 * $1500 = $75....so total would be $1575
Aver = (132+140+145+128)/4 = 136.25
2006-10-31 18:52:32 · answer #4 · answered by Maggie L 2 · 0⤊ 0⤋
1) are of rect = l x b = 12x10=120
2)2x+3=9
9-3=2x
6=2x
x=6/2=3
3)2/3+4/6= 4/6+4/6= 8/6= 4/3
4)diameter=8, so radius=1/2 of diameter=4
5)perimeter= 6+8+10= 24inches
6)volume= lxbxh= 3x3x3= 27inches cube
7)5/100 x 1500= $75, so 1500 + 75 = 1575
8) 132+140+145+128=545, so 545/4 = 136.25
2006-10-31 20:25:36 · answer #5 · answered by little_devil 2 · 0⤊ 0⤋
1) A-wl-12*10=120sq ft.
2) 2X+3=9
2x=9-3=6
x=3
2006-10-31 19:22:51 · answer #6 · answered by yupchagee 7 · 0⤊ 0⤋
1. area of a rectangle is lengthxwidth.. so it is 10x12=120 square feet.
2. 2x+3=9.. separate the x term from the free terms so it becomes
2x=9-3=6, x=6/2=3
what grade are you?
2006-10-31 18:44:42 · answer #7 · answered by dorios 1 · 0⤊ 1⤋