Atotal of 500 dollars was invested, part of it at 7 percent interest and the remainder at 8 percent. if the total yearly interest from both investments amounted to 38 dollars. how much was invested at the 8 percent rate?

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.

the equivalent expression are always the hardest ones but you look at the gcf also

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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step-by-step explanation: