if 21 is added to a number it becomes thrice diminished by 7 find the number

In a right angled triangle ABC, angle A= 90 degrees and 5sin^2B+7cos^2C+4/3+8tan^2 60 degrees= 7/27. If AC=3 find[..]

A spherical snowball is melting in such a way that its surface area decreases at the rate of 1in^2/min. How fast is[..]

The function H described by H(x)=2.75x+71.48 can be used to predict the hight, in centimeters, of a woman whose[..]

Soybean meal is 18% protein; cornmeal is 9% protein. How many pounds of each should be mixed togeather in order to[..]

The width of a rectangle is fixed at 23 cm. What length will make the perimeter greater than 92 cm? The length[..]

Please help me in the following: A bottle, a vase and a tank had a total of 875 ml of water in them. 3/7 of the[..]

The width of a rectangle is fixed at 23 cm. What lengths will make the peremter greater then 92 cm?

THE SUM OF 2 NO.S IS -9X.IF ONE NO. IS 5X,FIND THE OTHER.?

find 3 consecutive no.s whose sum is 127.