Solve the quation. x + = 4 a: x = -3 b: x = 4 c: x = 3 d: x = -4

x + 7/8 = 4

subtract 7/8 from each side

x = 4 - 7/8

borrow from the 4

x =3 8/8 - 7/8

x = 3 1/8

Choice C

answer: 2/4

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: