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dem82 [27]
3 years ago
13

Keisha wants to read for 90 minutes.so far , she has read 30% of her goal. how much longer does she need to reach her goal?

Mathematics
2 answers:
S_A_V [24]3 years ago
6 0
30% of 90            <em>whenever it says "of" put in a multiplication sign </em>
30% x 90             <em> take out the % sign (percent means divided by 100)</em>
30/100 =3/10               <em>simplify,then multiply by 90</em>
3/10 x 90 = 270/10         <em> simplify</em>
270 = 27     
90 - 27 = 63            <em>subtract 27 because it is the amount read so far from the total</em>
Keisha has to read 63 more minutes to reach her goal.
uysha [10]3 years ago
4 0

Answer:63

Step-by-step explanation:

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Square both sides:_

5x - 9 = x^2 + 2x + 1

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x = 5 or -2.

Lets look for for any extraneous solutions:-

x = 5 ;  sqrt (5*5-9) - 1 = sqrt16 - 1 =  3  and  x = 3  (right hand side of equation)

so x = 5 is a solution

x = -2:  sqrt(5*-2 - 9) - 1 =  sqrt (-19) - 1  and x = -2  so this is extraneous

Answer:- One solution x = 5

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4 years ago
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Step-by-step explanation:

you can solve this with the elimination process

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