Jenny James has score of 78 89 90 and 96 on her first four test what score should she make out of 100 points in order to have at least an average of 90

Answer:

f(x) = 2.25x + 5

Step-by-step explanation:

As given, the cost of shipping a box is based on its weight in pounds, and a flat rate of $5 for packing. This means $5 is common for each parcel that will be sent. Only the weight will vary.

So, option first f(x)=2.25x+5 is the correct answer. Here 2.25 is the per pound rate. Like if someone wants to send a parcel weighing 3 pounds, the price will be :

f(x)=2.25*3 +5

= $11.75

The function that shows the shi[ping cost as a function of x is f(x) = 2.25x + 5.

How is the function related to the shipping cost?

The function tells us that there is a constant 5. This constant is the flat rate of 5 dollars which is the rate for packing.

X is a variable whose values can change based on the weight of the package that is to be sent.

Read more on functions here:

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Final answer:

The equation in general form of a line is Ax + By + C = 0. Option a, -3x - y + 2 = 0, is already in general form.

Explanation:

The equation of a line can be written in different forms, such as point-slope form or slope-intercept form. The general form of a line, also known as the standard form, is given by Ax + By + C = 0. To determine the equation in general form, we need to rearrange the given equation.

Option a: -3x - y + 2 = 0. This equation is already in general form.

Option b: 3x - y - 2 = 0. To convert this equation to general form, we add 2 to both sides: 3x - y = 2.

Option c: 3x + y - 2 = 0. To convert this equation to general form, we subtract 2 from both sides: 3x + y = 2.

Therefore, option a (-3x - y + 2 = 0) is already written in general form.

Learn more about General form of a line here:

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