Blake has some quarters and dimes. he has 20 coins worth a total of $2.90. how many of each type of coin does he have?

Somone me i want to know what 18 hours out of 24 hours in a fraction

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.