robert is purchasing some equipment for his baseball team. he wants to buy some baseballs, each priced at m dollars. he has already spent b dollars on other equipment.

the following expression represents the total amount robert will spend after buying x baseballs.

if the amount already spent by robert on other equipment, b dollars, is doubled, then the value of m .

if the cost of each baseball, m dollars, is tripled, then the value of b and the value of mx will

Part A: (1/2)m

Part B: (1/3rd)b and 3mx

Step-by-step explanation:

Price of each baseball is=$m

Price of other equipment are=$b collectively

Total amount He spent on purchasing equipment is =(m+b)$

Part A:

in part A the amount on purchasing other equipment than baseball is getting doubled i.e. $2b then value of m will be (1/2)half of the total amount spent on purchasing baseball i.e. (1/2)m

Part B:

in part B the amount spent on purchasing baseball is getting tripled i.e. 3m, then value of b(amount of purchasing other equipment) is (1/3rd) of total amount spent on purchasing other equipment and value of mx will be 3mx

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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