Fractions and Decimals (.538 x .538 - .462 x .462) / (1-.924) = ? 31 21 11 1 31 21 11 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given expression = [ (.538)² - (.462)² ] / .076 = [(.538 + .462)(.538 - .462)] /.076=.076 / .076 = 1
Fractions and Decimals 3420 / 19 = ( ? / 0.01) x 7 9/45 9/40 9/30 9/35 9/45 9/40 9/30 9/35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 3420 / 19 = (y / 0.01) x 7Then , y = ( 3420 / 19) x (0.01 / 7) = 180 / 700 = 9/35
Fractions and Decimals ( 20 + 8 x 0.5 ) / ( 20 - ? ) = 12 14 20 16 18 14 20 16 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let (20 + 8 x 0.5) / ( 20 - y) =12Then, 24 =12 x (20 - y)∴ 12y = 216⇒ y = 18
Fractions and Decimals 475.124 x 15.98 ÷ 8.001 + 33.33 = ? 1183.578 883.578 983.578 1083.578 1183.578 883.578 983.578 1083.578 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 475.124 x (15.98 ÷ 8.001) + 33.33= (475.124 x 16/8) + 33.33 = 950.248 + 33.33 = 983.578
Fractions and Decimals (.125 + .027) / (.5 x .5 - 1.5 + .09) = ? 80 0.8 8 800 80 0.8 8 800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given expression = [(0.5)³ + (0.3)³] / [(0.5)² - 0.5 x 0.3 + (0.3)²]= [a³ + b³] / [a² - ab + b²]=[(a + b)(a² - ab + b²)]/ [a² -ab + b²]= a+b = 0.5 + 0.3 = 0.8
Fractions and Decimals (44.99)² - (15.01)² = ? 700 1100 1500 1800 700 1100 1500 1800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP a² - b² = (a + b)(a - b)Hence, (44.99)² - (15.01)² = (44.99 + 15.01)(44.99 - 15.01)= 60 x 29.98 = 60 x 30 = 1800
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