MATHEMATICS HIGH SCHOOL

The current cost of a box of cereal is $3.39. At the time of this writing, the CPI for cereal is 289.7. What was the cost of a box of cereal in 1983 to the nearest cent?

Answers

Answer 1

Answer:

To solve this problem we have to first identify the data that we need and is important. You can arrange it like this:

Current Cost of Cereal: $3.39

CPI: 289.7

To find the cost of a box of cereal in 1983 we will need to use the following formula:

Cost in Base Year = Current Cost/CPI*100

Replace the data in the formula and we get the following:

1983 = 3.39/289.7*100

In 1983 the cost of a box of cereal was $1.170176044

I hope this helps, Regards.

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Answers

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Evaluate : 5-3(x-1) when x=7

Answers

The value of 5-3(x-1) when x=7 is -13.

What is Evaluate meaning?

Evaluation is nothing but to solve an algebraic expression means to find the value of an expression by replacing the value of the variable in it.

To evaluate the expression value, we simply substitute the variable from its given value and simplify the expression by using order of operations.

In our case, the given expression is:

5-3(x-1)

Substitute the given number i.e., 7 for the variable in the expression:

5-3(7-1)

Solve the bracket first:

5-3(6)

Now solve the multiplication part:

5 - 18

Finally Subtract 5 from -18, we get:

-13

Hence the final value of the expression is -13 at x=7.

To learn more about Evaluation, refer to the link: