Which expression is equivalent to 10 - 6(5 - 2y)?

4(-5+3y) or -20+12y

Step-by-step explanation:

Order of operations states you have to distribute -6 to (5-2y) before you subtract anything from 10.

-6(5-2y) = -30 + 12y

10 - 30 + 12y = -20 + 12y

You can factor out a 4 now.

4(-5 + 3y)

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:

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.