Select all of the statements that describe the expression 7 + 3x. * 2 points The expression represents 7 plus 3 mes x. The expression represents 7 plus x mes x. The expression represents the sum of 7 and 3x. The expression represents the product of 7 and 3x. The expression represents 7 plus 3 plus x. The expression represents 7 plus x plus x

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

imma say 16%. sorry if its wrong. i'm doing the same stuff right now

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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