7 Answered Questions for the topic Sum And Difference

Sum And Difference

07/29/18

the sum of two numbers is 13 and their difference is 7
how do i explain this to my 9 year old where we can all understand on how to get the answer without algebra because they don't even teach carrying the number in addition and without guessing a... more
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01/28/18

Need Help Solving cos -105 with sum or difference identity
The question is cos -105. I know how to do the process for it but for some reason my answer doesn't have the right negatives. I am getting:   √2 + (-√6) --------------         4   The actual... more
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01/26/18

Can't Solve -1-√3 * 1-√3 ------- ------ 1+√3 * 1-√3
I am doing sum and difference formulas with sin, cos, and tan. I am doing tan75 with the difference formula.   So tan 120-45   I have all the things found I just don't know how to multiply it... more
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Sum And Difference Functions Product

11/01/17

sum, difference, and product of two functions
suppose that the functions f and g are defined for all real numbers x as follows. f(x)=3x^2 g(x)=x+4   (g - f)(x) = ____ (g + f)(x) = ____ (g * f)(2) = ____    Thanks! :D 
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Sum And Difference Functions Function Product

11/01/17

sum, difference, and product of two functions
suppose that functions r and s are defined for all real numbers x as follows. r(x)=3x-6 s(x)=6x   write the expressions for (r - s)(x)=____ (r + s)(x)=____ (r * s)(-1)=____
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Sum And Difference Functions Product #thanks

11/01/17

sum, difference, and product of two functions
Suppose that the functions g and h are defined for all real numbers x as follows. g(x)=2x h(x)= 4x^2    Write expressions for  (g + h)(x)= ___ (the "." is supposed to be for... more
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Sum And Difference

10/24/17

the sum of 11 and difference is 5
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