A maths teacher bought 40 calculators at $8.20 each and a number of other calculators costing $2.95 each. In all she spent$387. How many of the cheaper calculators did she buy?

An angle measures 14.8° less than the measure of its complementary angle. What is the measure of each angle? and

12 is 8% of what number

Yesterday Allen's heart beat 100,000 times. On average, how many times did it beat in a six-hour period yesterday?

What is 4180 round to the nearest thousand

Five times the first number added to the second number is 43 Four times the first number added to the second number is 36

Which of he following is proved by utilizing deductive reasoning? postulates undefined terms theorems definitions

The sum of three consecutive integers is 42. let x be the middle of the three things integers transcribe the statement accordingly

Leonardo recorded his speed while skateboarding and determind he was traveling 18 feet per seconds. How many feet could he travel in one minute?

If two positive integers p and q are written as p = a^2b^3 and q = a^3b, where a and b are integers, then show that LCM (p, q) * HCF (p, q) = pq

If the original distribution of x values is known to be normal, do we need to make any restriction about sample size in order to claim that the distribution of sample means x taken from random samples of a given size is normal?