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Select all of the following scenarios that can be modeled by the equation 5x+7=45

5x + 7 = 45
5x = 45 -7
5x = 38
X = 38/5 = 7 3/5 or in decimal
X = 7.6
Or this could be a straight line equation of y = mx + c
Were y = 45 m = 5 = gradient of 5. Through the point of origin c = 7 at x =0
Question not specific enough
What topic are you doing?

Feb 26, 2018 | Homework

1 Answer


To evaluate the expression you need the value of x.
To solve you do as follows
Take the exponential of both sides of ln(5x)=3
This gives x=(1/5) e^(3)

Apr 23, 2014 | Texas Instruments TI 30XIIS Scientific...

1 Answer

If y=f(x)=5x+3/4x-5 , show that x=f(y)

Write the equality in the form y=(5X+3)/(4X-5). Insert parentheses to ensure a correct result.
  1. Multiply both sides of the equality by (4X-5). This gives (4X-5)y=(5X+3).
  2. Open the parentheses as 4Xy-5y=5X+3
  3. Subtract 5X from both sides 4Xy-5y-5X=5X-5X+3
  4. Add 5y to both sides 4Xy-5X-5y+5y=5y+3 or 4Xy-5X=5y+3
  5. Factor the X on the left side X(4y-5)=5y+3
  6. If 4y-5 does not vanish, you can isolate X by dividing both members of the equality by (4y-5).
  7. You get X=(5y+3)/(4y-5)=f(y)
Compare the initial function f(x) and the function just found: They have the same form: X and y have switched places.

Jun 24, 2012 | Mathsoft StudyWorks! Mathematics Deluxe...

1 Answer

How do you use this stupid calculator? I had a TI-89 and had no problems but I had to get a standard calculator for college, they won't allow the graphing calculators but I keep getting an Error 02...

Standard calculators can not really understand abstract notation. So 5x3/5x to the calculator is not being read as 5x (times) 3 (divided by) 5x, it is actually trying to understand x as a number. and if x isn't assigned as a number you'll get an error. SO no x's or y's or any letters. Anything with letters you have to do on your own. So 5x*3 / 5x cross out the two 5x's and you're left with 3/1 so your answer is 3.
Hope that helps! -Joe

Jun 07, 2011 | Sharp EL-531VB Calculator

1 Answer

I have gone throught the programming steps 5x and no luck with the klik2 and a genie opener, any help?

I spoke to Overhead directly and they indicated that the HomeDepot Klick remote doesn't work with the older Overhead versions. They sold me a remote that worked for a cheaper price so I should have checked with them in the first place.
Now I'm happy after several days of frustration!

Apr 03, 2011 | Universal Garage Wireless Keyless Entry...

1 Answer

I need assistance understanding this algebra equation and the steps to solve it. 7+(9-5x)=5(2-x)

this is a simple algebraic equation in which we have to calculate the value of 'x' using simple operations


step 1(pen the brackets) 7+9-5x=10-5x
step 2(add 7 and 9) 16-5x=10-5x

now as 5x gets cancelled both the sides of the equal sign therefore no solution of this algebraic equation exist.

Mar 24, 2011 | MathRescue Word Problems Of Algebra Lite

2 Answers

How do I solve x and y in the following equations? 5x+3y=6 2x-4y=5 Thank you

You can solve it with following method.

5x+3y=6 2x-4y=5
So 5x=6-3y so 2[(6-3y)/5]-4y=5
So x=(6-3y)/5 so 12-6y-20y=25
so -26y=25-12
so -26y=13
so y= -(1/2)
so 2x=5+4y
so 2x=5+4(-1/2)
so 2x=(10-4)/2
so 2x=6/4
so x =3/2

The value of x=3/2 and value of y= -1/2

Let me know if you need further assistance.
Thanks for using FixYa.

Mar 03, 2010 | Office Equipment & Supplies

1 Answer

How do I graph an equation such as y= 5x + 2?

Turn calculator ON. If you do not see several icons press [MENu].
Use arrow to select the [GRAPH] application and press [EXE].
In the entry screen, the line with Y1= is highlighted. If it is not, use arrow to highlight it.
Press the right arrow, the highlighting disappears leaving you with Y1= and the blinking cursor.
At the position of the cursor enter 5 [X, theta,T] key under the [ALPHA]. On the screen appears 5X, complete you equation +2.
Press [EXE] to store function.
If you want to draw other functions, it is time to do so on that screen.
When done press [F6:Draw}.
If the screen does not show a lot of the function, you can use the arrow keys to pan the graph.
You can also press [SHIFT][V-Window] to set the window limits.

Hope it helps.

Oct 10, 2009 | Casio FX-9750GPlus Calculator

1 Answer

Report a bug

the exact equation is
15x^2 - 21x - 18
=3(5x^2 - 7x - 6)
=3{5x^2 -(10-3)x -6 }
=3{5x^2 - 10x + 3x -6}
=3{5x(x - 2) + 3(x-2)}
=3(x-2)(5x+3) these are the factors


Zulfikar Ali

Oct 16, 2008 | SoftMath Algebrator - Algebra Homework...

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