Question

part 2...write an expression that includes numbers and variables...hello I'm a 7th grader can you please help me with my math summer package and explain it in a way that a 7th grader can understand it number 1 ..is a 3 part which counts as 1 question

Answer 1

Explanation

Let it be:

• x: The number of days that Mr. White drives.

,

• y: The number of kilometres that Mr. White drives.

Then, we can write the following expression that represents the given situation.

$y=55x$

Then, we have:

Part a.

To know the number of km Mr. White drives in 5 days, we substitute x = 5 in the above equation and calculate.

$\begin{gathered} x=5 \\ y=55x \\ y=55(5) \\ y=275 \end{gathered}$

Therefore, Mr. White drives 275 km in 5 days.

Part b.

To know the number of km Mr. White drives in 8 days, we substitute x = 8 in the equation and calculate.

$\begin{gathered} x=8 \\ y=55x \\ y=55(8) \\ y=440 \end{gathered}$

Therefore, Mr. White drives 440 km in 8 days.

Part c.

To know the number of km Mr. White drives in 15 days, we substitute x = 15 in the equation and calculate.

$\begin{gathered} x=15 \\ y=55x \\ y=55(15) \\ y=825 \end{gathered}$

Therefore, Mr. White drives 825 km in 15 days.

Answer

Part a.

Mr. White drives 275 km in 5 days.

Part b.

Mr. White drives 440 km in 8 days.

Part c.

Mr. White drives 825 km in 15 days.