1. Write an equation for the statement: 3 times a number added to 8 is 56. Use n as the variable.
2. Write an equation for the statement: 6 times a number minus 7 is 3. Use n as the variable.
3. 400 students at the community college are in the engineering program. If 20 of the students are studying engineering, how many students are in the college?
4. 30% of a number is 30. What is the number?
5. What is 35% of 200?
6. What is 12% of 500?
7. A car travels an average of 65 miles per hour for 40 minutes. How far does the car travel?
8. Write an expression for the money value of the given coins, in cents: n dimes + 1/4 as many quarters.
9. For 3 years, Will kept $700. In a savings account that earned 4% simple interest annually. How much interest did Will earn?
10. Find the missing term (value of x) in the following proportion:
X/9 = 15/27
2006-06-27 05:28:31 · 7 answers · asked by Anonymous in Education & Reference ➔ Homework Help
3n +8 =56
3n = 56 - 8
3n = 48
n = 48/3 = 16
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6n - 7 = 3
6n = 3 +7 = 10
n = 10/6 =5/3 = 1.666 (recurring)
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Question not stated clearly.
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30/100 of n = 30
(30/100) X n = 30
0.3n = 30
n = 30/0.3 =300/3 = 100
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(35/100) X 200 = 35 X 2 = 70
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(12/100) X 500 = 12 X 5 = 60
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In 60 mins 65 miles. Hence in 1 min 65/60 miles. Thus, in 40 mins
the car travels 40 X (65/60) = (40/60) X 65 = 2/3 X 65 = 130/3miles i.e., 43.3333(recurring) miles.
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Again, the question is ambiguously stated because 1/4 as many quarters means 1/4 X n/4 means n/16 i.e., (n +n/16) dimes.
Alternatively the question could mean (n + n/4) dimes. Whichever is accepted by your instructor convert those many dimes to cents.
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4/100 of 700 dollars = (4/100) X 700 = $ 28 per annum. Since the interest is simple for 4 years the total interest amounts to 4 X 28
= $ 112 only for the 4 years.
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X/9 = 15/27
Hence, by cross-multiplication,27 x X = 9 x 15
Or X = (9 X 15)/27 = 5
2006-06-27 06:39:37 · answer #1 · answered by Sam 7 · 0⤊ 0⤋
ok i have been out of school for a while lol but if i remember correctly here goes
#1) 3(n)+8=56
#2) 6(n)-7+3
#10) x=5
because 5/15 = 3
9/27= 3
and I'm not sure about #9 but at 4% he should be making $28.00 a year
2006-06-27 05:47:23 · answer #2 · answered by guzmantear25 1 · 0⤊ 0⤋
#1=3n+8=56
#2= 6n-7=3
#5=70
#6 is 60
#10= x=5
2006-06-27 05:57:39 · answer #3 · answered by spurs_rock_321 2 · 0⤊ 0⤋
(9) is 28 annually so 28*3 =$84 is the interest Will earn. The rest everybody else has answered.
2006-06-27 06:04:21 · answer #4 · answered by greenwhitecollege 4 · 0⤊ 0⤋
4,5, and 6 i will awnser ok?
4. 10
5. 70 ( of is also known as multiplication)
6. 60
2006-06-27 05:37:19 · answer #5 · answered by Karlayy. ♥ 2 · 0⤊ 0⤋
Are you in pre-algebra?? Seems like it. That is one of the easiest math classes you are going to take from now thru college.
2006-06-27 05:32:39 · answer #6 · answered by masterurownmind 5 · 0⤊ 0⤋
come on now, cant do your homework for ya, work on it, sorry
2006-06-27 05:30:20 · answer #7 · answered by snookieoo3 5 · 0⤊ 0⤋