Equation + expression of a variable from the formula - practice problems - page 3 of 40
Number of problems found: 792
- Finding the base
Find the unknown base of percent: 12.5 percent of what = 16? - Quotient 80640
The quotient of two numbers is 22. The divisor is 154. What is the divisor? - Circumference 69934
You know the ratio of the circumference of the circle to the area is 4:9. What is the circle's diameter? - Determine 37931
40% of the base is 1200. Determine what the base is. - Average 20173
The average of the two numbers is 2.8. One number is 5. What is the second number? - Summands 4213
Divide the number 28 into two summands so that their product is maximal. - Determine 4056
Determine x if 3^x: 3²996 = 81 - Positive 3298
Which positive number equals twice its square? - Star equation
If 5/21 + 14/21 + ☆ = 1, then what is the value of ☆? - Boys and girls
There are 28 girls in the hall. 5/7 of all children are boys. How many children and how many boys are there? - Elements
If the number of elements is decreased by two, the number of permutations is decreased 30 times. How many elements are? - Radius
Determine the circle's radius if its perimeter and area are the same numbers. - Arithmetic 72544
The arithmetic mean of two numbers is 12. The first number is 5. What is the value of the second number? - Determine 7468
Determine the base if 2.8 per mille is 50. - Chocolate 4302
How much does whole chocolate cost when 2/3 costs 24 cents? - Expression: 4085
Determine the value of x and y in the expression: x! · 10^y = 0.0504. - Calculate 3339
A1 + a3 = 15 a1 + a2 + a3 = 21 Calculate a1 and q (quotient of the geometric sequence). - The length 18
The length of a rectangle is three times its width. Suppose the perimeter is 96 cm. Calculate the width of the rectangle. - The sum 27
The sum of a geometric progression's second and third terms is six times the fourth term. Find the two possible values of the common ratio. - Equation of the circle
Find an equation of the circle whose diameter has endpoints (1,-4) and (3,2).
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