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skelet666 [1.2K]
3 years ago
6

What is 6 8/9 times 2 1/2

Mathematics
2 answers:
Marrrta [24]3 years ago
7 0
6  8/9    * 2    1/2.            Change to mixed fractions.

= 9*6  + 8 = 62 ,    = 62/9
= 2*2  + 1 = 5,        = 5/2

= 62 / 9  *  5 / 2 = 155 / 9
=  17  2 /9.

Answer  =  17 whole number      2/9.
sammy [17]3 years ago
5 0
SO first off you wanna make both numbers into mix factions. 6 8/9 will be 62/9 and 2 1/2 will be 5/2. Next you wanna multiply straight across. so now the answe should be 310/18 then simply for a mixed number. you can figure that out
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3 years ago
Let a= x^2 +4. Rewrite the following equation in terms of a and set it equal to zero. (x^2+4)^2+32=12x^2+48 what are the solutio
Umnica [9.8K]
Just replace x^2+4 with a
factor out on left side
(x^2+4)^2+32=12(x^2+4)
replace x^2+4 with a
a^2+32=12a
minus 12a both sides
a^2-12a+32=0
solve
factor
what 2 numbers mulitply to get 32 and add to get -12
-4 and -8
(a-4)(a-8)=0

set each to zero
a-4=0
a=4

a-8=0
a=8


remember
a=x^2+4
so

4=x^2+4
0=x^2
0=x

8=x^2+4
4=x^2
+/-2=x


x=-2, 0, 2
5 0
3 years ago
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