Algebra Answers

what is the best estimate of 78.35 x 38.21?

square root 3 -1 square root 3 +1
_____________ + _______________
square root 3 +1 square root 3-1

13. The numerator of a fraction is 6 less than the denominator. If 3 is added to the numerator, the fraction is equal to 2/3 , What is the original fraction

One of the two digits of two-digit number is three times the other. If we interchange the digits and add the resulting number to the original number, we get 132. Find the number.

The sum of two digits of a two-digit number is 13. If the digits are interchanged, and the resulting number is added to the original number, then we get 143. What is the original number?

Jack is twice as old as Jill. If 4 years ago Jack’s age was thrice as Jill’s. Find their present age.

Two numbers are such that the ratio between them is 3:5. If each is increased by 10, the ratio
between the new numbers so formed is 5:7. Find the original numbers.

Solve:3(2u+v)=7uv,3(u+3v)=11uv

U = {0,1,2,3,4,5,6,7,8,9} Find:
a. {1,3,5,7}'
b. {2,4,6}'
c. {0,5,8,9}'
d. {}'
e. {0}'

what is the sum of a number and 26