2,563 Answered Questions for the topic Maths

Maths Chemistry

11/17/19

Help please! Density Equation.
If you dissolve 615 g of salt in 34500 ml of water, what is the density of that solution of salty water? In this particular example, assume that the total volume doesn’t change when salt is added... more
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Maths

11/15/19

Quadratic equations
find two rational number which differ by 3 and the sum of whose squares is 117.
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11/15/19

Precalc question
A car leaves Seattle heading east. The speed of the car in mph after m minutes is given by the function C(m) = 70m2 10 + m2 .(a) Find a function m = f(s) that converts seconds s into minutes m.... more
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11/15/19

Precalc question
(a) Let f(x) be a linear function, f(x) = ax + b for constants a and b. Show that f(f(x)) is a linear function.(b) Find a function g(x) such that g(g(x)) = 6x − 8.
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11/15/19

Precalc Question
Let f(x) = 1 2 x + 3.Give a quadratic function whose fixed points are x = −2 and x = 3.
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11/15/19

Precalc Question
Let y = f(z) = √ 4 − z 2 and z = g(x) = 2x + 3. Compute the composition y = f(g(x)). Find the largest possible domain of x-values so that the composition y = f(g(x)) is defined.
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11/14/19

Precalc Question
Suppose you have a function y = f(x) such that the domain of f(x) is 1 ≤ x ≤ 6 and the range of f(x) is −3 ≤ y ≤ 5.(a) What is the domain of f(2(x − 3)) ?(b) What is the range of f(2(x − 3)) ?(c)... more
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11/14/19

Half-Angle Formulas
Simplify for x in the third quadrant:(sin x/2-cos x/2)^2
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11/14/19

Double Angle Formulas
Simplify:tan x sin 2x
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11/14/19

Write an equation of the line that passes through (1,2) and is parallel to the line y=−5x+4 .
For my intermediate algebra class
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11/14/19

Write an equation of the line that passes through (−1,3) and is parallel to the line y=2x+2 .
For my intermediate algebra class.
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11/14/19

Need help with this maths equation!
The coordinate pairs below represent points on the graph of a quadratic function. None of the points are completely identical.(-p-1, (h2+28h)/3); (-2,(-h+p-1)/2); (3,-(p2)/4); (-11,1-11p); (-5,7);... more
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Maths

11/14/19

The substitution method answer for the following equations
x = -3y + 6 4y + x = 13
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Maths Geometry

11/14/19

A certain television is advertised as a 58-inch TV (the diagonal length). If the width of the TV is 42 inches, how many inches tall is the TV?
i need help now ,please!
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11/12/19

Double-Angle Formulas
Find sin 2θ if θ is in the first quadrant and tan θ=40/9.
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11/12/19

A population of bacteria is initially 1800 cells. After 2 hours, the population has increased to 1900 cells.

A population of bacteria is initially 1800 cells. After 2 hours, the population has increased to 1900 cells. Assume that the population is an exponential function of time. How many hours after the... more
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Maths

11/11/19

Katie is 1.83 m tall. George is 9 cm shorter than Katie. How tall is George? Give your answer in cm
Katie is 1.83 m tall. George is 9 cmshorter than Katie. How tall is George? Give your answer in cm
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11/10/19

I need to demonstrate that
If x>2 then 1 < 1 √2-2 x - 2
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Maths Algebra

11/10/19

I would like to compare two expressions
2 X (5/4)⁴ and 10 X (3/8)³ I know that the first expression is bigger but i don't know how to show it
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11/10/19

Precalc question
Steve likes to entertain friends at parties with “wire tricks.” Suppose he takes a piece of wire 60 inches long and cuts it into two pieces. Steve takes the first piece of wire and bends it into... more
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11/10/19

Precalc question
You have $6000 with which to build a rectangular enclosure with fencing. The fencing material costs $20 per meter. You also want to have two parititions across the width of the enclosure, so that... more
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11/10/19

Precalc question
Jun has 300 meters of fencing to make a rectangular enclosure. She also wants to use some fencing to split the enclosure into two parts with a fence parallel to two of the sides. What dimensions... more
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11/10/19

Precalc question
A Norman window is a rectangle with a semicircle on top. Suppose that the perimeter of a particular Norman window is to be 24 feet. What should its dimensions be in order to maximize the area of... more
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11/10/19

Precalc question
Rosalie is organizing a circus performance to raise money for a charity. She is trying to decide how much to charge for tickets. From past experience, she knows that the number of people who will... more
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11/10/19

Precalculus question
Sylvia has an apple orchard. One season, her 100 trees yielded 140 apples per tree. She wants to increase her production by adding more trees to the orchard. However, she knows that for every 10... more
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