Solve x+y=7 and 3x-2y=11 using elimination

2. I bought my flat last year for £40,000. The value of my flat increased by 12% in September and then by a further 10% in January this year. What is its value now?

Henry bought 3 sets of pencils. After he bought the pencils, his account balance showed a change of - $30.63. What would have been the change to Henry's account balance had he only bought 1 set of pencils?

What was the interest rate if your balance on an investment of $857 at the end of six years is $1268.36?

Simplify 7/8 divided by 8

Compute the permutations and combinations. A company has 10 men qualified to run a machine that requires 3 operators at a time. Find how many groups of 3 operators are possible.

A sphere has a volume of 32/3pi cubic units. What is the radius of the sphere?

1 1/3 - 3 3/4 1.3 1/4 2.3 4/9 3.5 1/4 4.5

Amount sugar in a candy bar decreased by 6.7% to 3.2 grams how much sugar wascin the candy before the decrease?

Two mechanics worked on a car. The first mechanic charged $85 per hour, andthe second mechanic charged $70 per hour. The mechanics worked for a combinedtotal of 20 hours, and together they charged a total of $1625. How long did each mechanic work?

Which fraction is bigger 1 1/6 or 1 4/12