1）One fifth of the sum of two angles is 36° and half of the difference between thw two angles is 40°. Find the size of the two angles. 2）The prize of 6 chairs and 3 tables is RM480. The price of 8 chairs and a table is RM400. Find the price of a chair and a table.
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3; 9 is 8 to -4

step-by-step explanation:

step-by-step explanation:

sry but any answer choices

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:

the answer is a) y= 2 csc [0.5 (x+pi/2)]-1

step-by-step explanation: