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3 years ago

Estimate the percentage: 6,683 of 20,489 a. 0.3% c. 3% b. 43.3% d. 33.3% Explain

Mathematics

2 answers:

Katarina [22]3 years ago

6 0

Answer:

Step-by-step explanation:

Alja [10]3 years ago

5 0

Answer:

D. 33.3%

Step-by-step explanation:

6683 divided by 20489 = 33%

estimated : 7000 divided by 20000 = 35 %

.333 (33 percent) times 20,489 = 6823

I hope this helps. I tried to do it quickly, so let me know if I messed up or you need more clarification.

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5c squared- d squared+3/2c - 4d...c= -1. d= -4

riadik2000 [5.3K]

For this case we have the following expression:

$5c ^ 2-d ^ 2 + \frac {3} {2} c-4d$

We must find the value of the expression when:

$c = -1\\d = -4$

Substituting we have:

$5 (-1) ^ 2 - (- 4) ^ 2 + \frac {3} {2} (- 1) -4 (-4) =\\5 (1) -16- \frac {3} {2} + 16 =\\5-16- \frac {3} {2} + 16 =\\-11- \frac {3} {2} + 16 =\\- \frac {25} {2} + 16 =\\\frac {-25 + 32} {2} =\\\frac {7} {2}$

Finally, the value of the expression is:

$\frac {7} {2}$

ANswer:

$\frac {7} {2}$

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Answer:

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