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larisa [96]
3 years ago
14

Tell weather the two rates form a proportion. help

Mathematics
1 answer:
Sindrei [870]3 years ago
6 0
7/9 = 42/54...when 42/54 reduces, it becomes 7/9...so this is proportional because proportions are nothing but equivalent fractions.

u could also check it this way...
12/21 = 15/24
cross multiply
(21)(15) = (12)(24)
315 = 288.....these do not equal and are therefore, not proportionate

440/4 = 300/3
110 = 100....not equal, so not proportionate

120/5 = 88/4
24 = 22.....not proportionate

66/82 = 99/123
0.804 = 0.804.......these are proportional

68/172 = 43/123
0.395 = 0.349......nope, not proportional




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Select the locations on the number line to plot the points 9/2 and −7/2 .
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3 years ago
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Solve with completing the square method:<br>6x²-7x+2=0 and  ax²+bx+c=0
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3 years ago
Give the unit rate for the better deal.<br><br> $156<br> 4 g<br> or <br> $280<br> 7 g
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Answer:

$156 for 4 g

I did not rally understand how you worded your question so sorry if I got it wrong! <3

Step-by-step explanation:

$156 for 4 g =

$156 / 4 = $39 dollars for 1 g

$280 for 7 g =

$280/7 = $40 dollars for 1 g

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