My work book tells me to use the "plus equal" key for certin equations...problem is...there isn't one! im using a casio DR-T220...is there another way to get the same effect as the "plus equal button? and if so...how?
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What you want to do is solve the linear equation 2x=10 to find the value of the unknown x that makes the equality true. Solving an equation usually involves rearranging therms, factors and so on. However your calculator was not designed to handle the solution of equations, no matter how simple they are. Some Casio scientific calculators can solve some types of equations (polynomials of degree 2 or 3, simultaneous linear equations in up to 3 unknowns). These are the FX-115 ES (Plus) and FX-991 ES (Plus C). Other equivalent models are sold in the world under different names.
The equal sign is in fact a command to tell the calculator to start calculating. It cannot be used independently, out of this context. Newer scientific calculators that have equation solving capabilities may have a second equal sign used to write equations. See if you have an additional = accessed by pressing an ALPHA key first.
You do not need a calculator for this proportion. For a proportion a/b=c/d, the product of the extrems (a*d) is equal to the product of the means (b*c). In your case x*x=8*8 or x^2=64. The two solutions are x=+square root (64) or x=-square root(64).
For a less trivial equation, you can use the solve feature of the FX-119ES. To do so, use the ALPHA keyboard to enter your equation; once the equation is typed in, do not press the main equal sign, but the Solve key (the key is located near the top left corner of the keyboard). You will be prompted to solve for X?.
The calculator does not have an equation SOLVER. But to solve this equation or any linear equation you need no calculator. Use the properties of equalities to isolate the unknown. X-17=34 X-17+17=34+17 (Adding the same number to both sides of an equality does not break the balance). Since -17+17=0 and 34+17=51 You get X=51
You can not do that like you think you could. You have to enter your y= equation in to the graph and then look at the graph line to see what X equals at a certain Y. Or you can rearrange the equation. For example: y=4x+5, rearrange it to be (y-5)/4 then plug your Y-value in and it will give you the X-value.
To enter powers of trigonometric functions you must enclose the functions in parentheses and then apply the exponent to the whole. For example X1t =(sin T)^3 , Y1t=(cos T)^3 will give you a shape similar to a rhombus with concave sides. The symbol ^syands for the operation of raising to a power. The key is the one with the caret symbol ^ , and it is wedged between the xsqure and EXIT keys (third row of keys). As regards the cotangent, use the equivalent definition cot(X)=1/tan(X).
You enter the problem into the calculator and when you are finished you press the equals sign to make it give you the answer to your problem.
Here is an example;
If I wanted to know what the sum (or total) was for 2 + 10+ 16 - I would enter the number 2 and then the plus sign + and then the number ten and the plus sign + and then the number sixteen and the plus sign again + and then press the equals sign which looks like this =. when I press the equals sign = the calculator gives me the answer to my question of what the total of those numbers are.
You can evaluate any expression (find the value of any expression for a particular value of its variable).Store a value in the variable, say X. Key in the expression and press [EXE].
You can consider your expression(should not contain a relational operator such as =, greater than, less than, greater than or equal to, less than or equal to) to be a function Y1(x) = expression and graph it, or generate a table for it. You will have several values of the function calculated at various points.
You can set your expression equal to 0 and find the particular value(s) of the variable (the unknown) that make the equality TRUE. That is called solving an equation.
I am not sure that it has a solver (solving an equation or an inequation) but you can always draw your expression as a function and explore the graph (SKTCH) to locate the roots (or zeros) of the functions (the values of the variable where the function equals zero.) That is called solving graphically.
Hope it helps. Thank you for using FixYa and for rating this solution.
The number immediately following the e key is the power to which the value of e (2.718281828) is raised. Thus, e5 is equal to 148.4131591, the same as (2.718281828^5) If you press the e key without entering a number after it, an error results. Therefore, the only way to read your equation [500e^0.4] is to assume that e is first being raised to the power of 0.4, then multiplied by 500. To enter this on the Casio, press 5 0 0 [shift] [In] . 4
You will get 745.9123488
If the equation is intended to read (500 multiplied by e) then this value raised to the power of 0.4, that doesn't make sense, as e has no number following it.
Your second equation, 6.1e^0.014 would be entered 6 . 1 [shift] [In] . 0 1 4
This returns a value of 6.186006
You omit the 'power of' sign when you enter the equations.