1)x/2 + x/4=5
2) An interior designer works on an hourly wage plus a markup on materials. If the desiger spends 25 hours on a projec at $15 an hour and recommends materials costing $3800 that are marked up 10%, what is the designers fee?
3) 182 is 2.5% of what number?
2006-08-17 11:58:18 · 5 answers · asked by VHS123 2 in Education & Reference ➔ Homework Help
1. Find common denominator. In this case, it is 4.
since 2 x 2 is 4, the first term is 2x/4
since 4 x 1 is 4, the second term is x/4 (stays the same)
2. To get rid of the denominators (fractions), multiply the entire problem by the denominator.
SO: 2x/4 + x/4 = 5 turns into 2x + x = 20
If you combine like terms, you get 3x = 20.
Divide by the coefficient. x = 20/3 or 6 2/3
2.) You're on your own. Sorry!
3.) 182 = 2.5% X (that's what it looks like in math terms)
Make a proportion. You don't know the number, so that is X.
182/X = 2.5/100
Cross multiply. You get: 18200 = 2.5X
Divide 18200 by 2.5 and you have X.
2006-08-17 12:26:07 · answer #1 · answered by Obama, 47 y/o political virgin 5 · 1⤊ 0⤋
x=20/3
2006-08-17 12:04:09 · answer #2 · answered by gary 2 · 0⤊ 0⤋
x/2 + x/4 = 5
x + x = 5 multiply 2 multiply 4
2x = 10 multiply 4
2x = 40
x = 40/2
x = 20
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1 hr = $15
25 hrs ,
= $15 x 25
= $ 375
(10/100)% x $3800 = $380
total fee,
$375 + $380 = $755
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(25/100)% x 182 = 45.5
2006-08-17 17:30:05 · answer #3 · answered by C T H 2 · 0⤊ 0⤋
1. 20/3
2. 4555
3. 7280
2006-08-17 12:13:39 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1) x = 20
2)$4555
3)455 (put a decimal point somewhere)
2006-08-17 12:11:33 · answer #5 · answered by socks 2 · 0⤊ 0⤋