There are a total of Forty seven questions in the math section of the psat.
Answer:
is this the one u were asking about in the comment but ill just answer this anyway-
Explanation:
a).3
b).85/85%/ 17/20 - idk what form its asking for but this the general idea
c) about a 285 hour battery life
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Answer:
a/b= 2/15
Explanation:
3a +b
----------- = 7/5
b
<h2>now cross multiple both side</h2>
5(3a+b)=7 x b
15a +5b = 7b
15a = 7b-5b
15a = 2b
15a/2b = 1
a/b x 15/2 =1
<h3>multiple both side
by 2/15</h3>
we get,
a/b = 2/15
hope you have no doubt now !
<h2>we get ,</h2>
