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35. let the no. of submarines hit be x
then the total no. of destroyers hit = ( 10 -x)
so the total no. of points = 36
so (10 -x) * 5 + 3*x = 36
on solving we get x = 7
so the total no. of submarines hit = 7
36. let the no of flags and pom pom be x
so the total budget = 5.20 * x + 0.80 *x+ 47 = 377
on solving we get x = 55
so the cheer leaders can buy 55 flags and pom poms
37. let the no of pom poms be x
then the no of flags =2x
so the total budget = 5.20 * x + 0.80 * 2x = 340
on solving we get x = 50
so the cheer leaders can buy 100 flags and 50 pom poms
38. let the weekly allowance be x
then money spent on golf = 0.5 x
money earned by car washing = 15
money left = 32.50
so x - 0.5x + 15 = 32.50
so x= 35
so her weekly allowance is $35
39. let Fred have x
then david has 5x
Bill has x+15
now total = x+ 5x + x+ 15 = 260
on solving x = 35
Fred has 35
David has 175
Bill has 50
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39. Wouldn't Bill have $85 bc twice twice the amount of 35 is 70 + 15 is 85
Wouldn't Bill have $85 because twice the amount of 35 is 70 + 15 is 85 ??
let Fred have x
Bill has 2x+15
now total = x+ 5x + 2x+ 15 = 260
on solving x = 30.62
Fred has 30.62
David has 153.12
Why do the number of flags = 2x?
because in question no. 37 they needed twice as many flags as no. of pom poms
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