104 Answered Questions for the topic Solutions

02/22/15

#### Please help!! Select the approximate values of x that are solutions to f(x) =0, where f(x) = -9x^2 +4x+7

a) {-1.29,0.57}
b) {-9,4}
c) {-0.44,-0.78}
d) {-0.69,1.13}

02/22/15

#### Please help me solve this!! Select the approximate values of x that are solutions to f(x) =0, where f(x) = -6x^2 +2x+4

a) {-0.67,1.00}
b) {-6,2}
c) {-0.33,-0.67}
d) {-1.50,0.50}

02/22/15

#### Need help! Select the approximate values of x that are solutions to f(x) =0, where f(x) = -4x^2 +5x+7

a) {2.09, -0.84}
b) {-4,5}
c) {-1.25,-1.75}
d) {-0.57,0.71}

02/17/15

#### How much of each solution should be used if 21 gallons of 4% solution are needed?

A mixture of 4% disinfectant solution is to be made from 5% and 2% disinfectant solutions. How much of each solution should be used if 21 gallons of 4% solution are needed?

#### Describe all solutions of Ax=0

Let A= [1 -4 5 4
2 -8 10 8]
Describe all solutions of Ax=0.

11/24/14

#### Determine the values of K for the equation

Determine the values of K for which 3x2+kx+12=0 has each type of solution justify each answer.
a) exactly one real solution
b)two imaginary solutions
c)two real solutions

#### Describe all solutions of Ax=0

Let A= [1 -4 5 4
2 -8 10 8]
Describe all solutions of Ax=0
x=x2 ?+x3 ? +x4?

Solutions

11/09/14

#### select the solution

Consider the equations:f(x) = -6x - 1 and g(x) =4x^2Select the solution for (fg) (x). A. -6x -1 +4x^2
B. -24x^3 - 4x^2
C. -24x^2 - 1
D. -24x^5

#### determine the value of k for which the system has no solutions

determine the value of k for which the system
x+y+5z=-3
x+2y-2z=3
4x+11y+kz=31
has no solutions.
k=?

#### Determine the value of h such that the matrix is the augmented matrix of a linear system with infinitely many solutions.

7 -3 2
14 h 4
h=?

#### 5(2x-1)+x+17=5x+6(x+2)

i need help determining if there are no solution, one solution l, or an infinite number of solutions.

#### 3(x-1)+x=4(x+2)

I need help figuring out if there are no solutions, one solution or an infinite number of solutions.

Solutions

06/28/14

#### Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8x2 + 4x + 7.

{–1.14, 0.57} {-8, 4} {–0.50, –0.88} {–0.72, 1.22}

#### Graph f(x)

How can the graph f(x)=0.3|x-6|+7 be obtained from the graph of y=|x|?
a) Shift it horizontally 3 units to the left. Shrink it vertically by a factory of 0.6. Shift it 7 units upward
b) Shift...
more

#### functions question

Let f(x)=3x-1 and g(x)=x^2+4
find (f g)(-2)

05/07/14

#### two word problems

1)A car company charges $31 per day to rent a particular type of car and $0.16 per mile. Juan is charged $47.96 for a one day rental. How many mile did he...
more

05/07/14

#### word problem library

The number o books in a small library increase according to the function B=6,700e0.03t, where t is the measure of years. How many books will the library have after 2 year(s)?
a) 7,693
b)...
more

#### solution of the equation

Determine the nature of the solutions of the equation:
5x^2-6x=-9
a)Two real solutions
b) No solutions
c)One real solution
d)two solutions with imaginary parts

04/23/14

#### Help please please

Solve (x^2-9)/x<=0 and write interval notation for the solution set. Show careful algebraic work/explanation.

Solutions

03/13/14

#### What would be a line that is perpendicular to y=x?

I thought it y=-x+6 but don't no how to work it out

01/28/14

#### Word Problem

A solution is 10% citric acid. if 3 liters of a 20% citric acid solution are added to it, the result is a solution this is in a ratio of 13 parts citric acid to 102 parts "other than citric acid"....
more

01/06/14

#### Find all solutions in the interval [0,2pi): sin2x=cosx

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

01/06/14

#### Find all solutions in the interval [0,2pi): tan^2x+(sqrt3 - 1)tanx-sqrt3 = 0

This is for my trig class, thanks for the help! If you could, could you please show all your work? Thanks again!

01/05/14

#### Use the quadratic formula to find all solutions in the interval [0,2pi): tan^2x-6tanx+4=0

This is for my trig class, thanks for the help!

01/03/14

#### Find all solutions in the interval [0,2pi): 4sin^2x=1

This is for my trig class. Thanks for the help!

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