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2 years ago

2x=26 what calculation would need to be done to solve this problem

Mathematics

2 answers:

sesenic [268]2 years ago

8 0

Answer:

x=13

Step-by-step explanation:

2x=26

x=26/2

x=13

..........

Alex73 [517]2 years ago

6 0

Answer:

x=13

Step-by-step explanation

First, you get rid of the x by doing 26 divided by 2 the 2 divide by 2 cancels out.

The inverse of multiplication is division so you divide.

x will equal the number you got by dividing 26 by 2.

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Answer:

The equation of the parabola is $y = \frac{2}{5}\cdot x^{2}-\frac{32}{5}\cdot x -\frac{72}{5}$ . The average rate of change of the parabola is -4.

Step-by-step explanation:

We must remember that a parabola is represented by a quadratic function, which can be formed by knowing three different points. A quadratic function is standard form is represented by:

$y = a\cdot x^{2}+b\cdot x + c$

Where:

$x$ - Independent variable, dimensionless.

$y$ - Dependent variable, dimensionless.

$a$ , $b$ , $c$ - Coefficients, dimensionless.

If we know that $(3, -30)$ , $(-2, 0)$ and $(18, 0)$ are part of the parabola, the following linear system of equations is formed:

$9\cdot a +3\cdot b + c = -30$

$4\cdot a -2\cdot b +c = 0$

$324\cdot a +18\cdot b + c = 0$

This system can be solved both by algebraic means (substitution, elimination, equalization, determinant) and by numerical methods. The solution of the linear system is:

$a = \frac{2}{5}$ , $b = -\frac{32}{5}$ , $c = -\frac{72}{5}$ .