1. Factorise fully mx+cx+my+cy

2. Harry is x years old now.
Three years ago, Jenny was twice Harry's age. In three years time, Ahmed will be five times as old as jenny. Write an expression for Ahmeds age now.

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:

v=1788.75

step-by-step explanation:

i belive that is the answer

the answer would be c

it is impossible.