PLEASE HELP!!!!!!!!!

Mathematics

1 answer:

Phantasy [73]4 years ago

6 0

Part A : Substitution

Elimination

Argumentated matrices.

Part B :

1. Substitution is a method of solving systems of equations by removing all but one of the variables in one of the equations and then solving that equation. This is achieved by isolating the other variable in an equation and then substituting values for these variables in other another equation.

2. Elimination is another way to solve systems of equations by rewriting one of the equations in terms of only one variable. The elimination method achieves this by adding or subtracting equations from each other in order to cancel out one of the variables.

3. Augmented matrices can also be used to solve systems of equations. The augmented matrix consists of rows for each equation, columns for each variable, and an augmented column that contains the constant term on the other side of the equation.

Part C :

7x +y = 14

5x + y = 4

X= 5 and y = - 21

Hope this Helps : )

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The number of members f(x) in Joe's health club increased by 25% every year over a period of x years. The function below shows t

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Solution:

It is given that , number of members f(x) in Joe's health club increased by 25% every year over a period of x years.

The relationship between f(x) and x is given as:

$f(x) = 15(1.25)^x$

Replacing f(x) by y, in the above equation

y= $15(1.25)^x$

To draw the graph without the help of Desmos, find diifferent value of y, for different values of x, For example , for x=1

We get , y= $15(1.25)^1$ = 18.75

For, x=2

y= $15(1.25)^2$ =15 × 1.5625=23.4375

For, x=3

y= $15(1.25)^3$ = 29.296875

So, for different values of x, we get different values of y. Mark these points in the coordinate plane, and join them . You will get the graph of the above function :⇒ f(x)= $15(1.25)^x$

Graph is depicted below.