# Functions + expression of a variable from the formula - math problems

#### Number of problems found: 261

- Value of expression

X=2, y=-5 and z=3 what is the value of x-2y? - Expressions 3

If k(x+6)= 4x^{2}+ 20, what is k(10)=? - Reciprocal value

How do I calculate a number x that is 9 greater than its reciprocal (1/x)? - Demographics

The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase of population? - Insert 7

Insert five harmonic means between 3 and 18 - Tangents to ellipse

Find the magnitude of the angle at which the ellipse x^{2}+ 5 y^{2}= 5 is visible from the point P[5, 1] . - HP - harmonic progression

Determine the 8th term of the harmonic progression 2, 4/3, 1,… - Finding the base

Find the unknown base of percent: 12.5 percent of what = 16? - Roots and coefficient

In the equation 2x ^ 2 + bx-9 = 0 is one root x1 = -3/2. Determine the second root and the coefficient b. - Digits

Show that if x, y, z are 3 consecutive nonzero digits, zyx-xyz = 198, where zyx and xyz are three-digit numbers created from x, y, z. - What is

What is the annual percentage increase in the city when the population has tripled in 20 years? - Find the 15

Find the tangent line of the ellipse 9 x^{2}+ 16 y^{2}= 144 that has the slope k = -1 - Together m+w

Women 30%. Men are 360 more. How many are together? - Price increase

A 20 percent price increase meant a 90-crown raise. How many cost a product after? - The parabolic segment

The parabolic segment has a base a = 4 cm and a height v = 6 cm. Calculate the volume of the body that results from the rotation of this segment a) around its base b) around its axis. - Symmetry by plane

Determine the coordinates of a image of point A (3, -4, -6) at a symmetry that is determined by the plane x-y-4z-13 = 0 - Hyperbola equation

Find the hyperbola equation with the center of S [0; 0], passing through the points: A [5; 3] B [8; -10] - Annual growth

The population has grown from 25,000 to 33,600 in 10 years. Calculate what was the average annual population growth in%? - Geometric progression

In geometric progression, a1 = 7, q = 5. Find the condition for n to sum first n members is: sn≤217. - Linear function

Using one of the following forms x+p=q or px=q write an to represent these problems using x as the unknown variable Larry ran 7 more miles than Barry in a month, if Larry ran 20 miles how many did Barry run? please help its due tomorrow

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