-3
It is 10.
7
Well, darling, 2x plus 5 is just an algebraic expression that represents the sum of 2 times a variable x and 5. So, if you want to find the value of that expression, you need to know the value of x. Math can be a real hoot sometimes, can't it?
-4 (-9 +5 = -4)
The expression "5 more than x" represents the quantity obtained by adding 5 to the value of x. This can be written mathematically as ( x + 5 ). In this context, it emphasizes that 5 is being added to whatever value x holds, indicating a relationship of increase relative to x.
x + 5
The vertex of this parabola is at 5 5 When the x-value is 6 the y-value is -1. The coefficient of the squared expression in the parabola's equation is -6.
8
No, ( x - 5 ) is not the same as ( 5 - x ). The expression ( x - 5 ) represents a value that decreases by 5, while ( 5 - x ) represents a value that decreases by ( x ) from 5. In fact, ( 5 - x ) is the negative of ( x - 5 ), meaning they have opposite signs.
To find the value of the expression 4x - 2y + xy when x = -1 and y = 5, we first substitute the values of x and y into the expression. This gives us 4(-1) - 2(5) + (-1)(5). Simplifying this further, we get -4 - 10 - 5, which equals -19. Therefore, the value of the expression is -19 when x = -1 and y = 5.
5
The expression (-9x^2 - 5) is a quadratic expression in terms of (x). It represents a downward-opening parabola due to the negative coefficient of (x^2). The constant term is (-5), which indicates the vertical shift of the graph. To evaluate this expression for a specific value of (x), simply substitute that value into the equation.