35 (t + 29) = −3(3 − t)

-32

Step-by-step explanation:

35 (t + 29) = −3(3 − t)

Open the brackets

35t+1015= -9+3t

Collect like terms

35t-3t=-9-1015

32t= -1024

Divide both side by 32

32t/32 = -1024/32

t= -32

560

step-by-step explanation:

giggidy

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: