Please help!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Vesnalui [34]3 years ago

8 0

Answer:

a) 4%

b) 49%

c) 21%

D) 69% (its a debation on this one because i didnt add the 4% that had no opinion)

e) My assumption on these probability is that 47% of the dads has gotten worse day.

d) This assumption is reasonable because in the table is shown that 47% is worse compared to all the other percentage, which is shown to be less.

Step-by-step explanation:

Percentages always goes up to 100% (most of the time) but in this case it would.

47+28+21=96%

100%-96%=4%

Same + better = Percent

21+28=49%

D) Add all the percentages except better.

28+41=69%

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You have the equations set up correctly. I will use r and b as the variables to make it easier to follow.

12r + 8b = 70
20r + 12b = 110

First let's solve one of the equations for one of the variables.

12r = 70 - 8b

$r = \frac{70-8b}{12}$

Now plug that in for r in the second equation.

$20( \frac{70-8b}{12})+12b = 110$

Simplify

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$-16b = -80$

b = 5 grams

Now plug 5 in for b in one of the original equations to find r.

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12r = 30

r = 2.5 grams

So the red marbles weigh 2.5 grams, and the blue marbles weigh 5 grams.

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