PLEASE help me answer this question its for my math review packet and nobody is responding!!!?

Education & Reference by Anonymous 2018-06-13 10:06:42

Social Science

6 answers

David answered 42 out of 50 questions correctly in a Math test. At the same rate, how many would he answer correctly ig there were 75 questions?

Anonymous

75 is 1.5 times the size of 50. Multiply 42 x 1.5 = 63
Anonymous

42/50 = x/75 crossmultiply 42x = 3750 x= 3750/42 = 89.3
Anonymous

do cross muiltplacation. 42/50 ?/75 = 63/75 so 63 correctly answerd questions
Anonymous

thank you soso much!!
Anonymous

42 out of 50 is 84% and 84% of 75 is 63 or 0.84 times 75 is 63 answered correctly
Anonymous

42/50 = 0.84. So far he has a score of 84%. To extend that to 75 questions, simply multiply 75 by 0.84.