7th Staar Review

Front

What is simple interest?

Back

Simple interest is calculated using the formula: Interest = Principal x Rate x Time. It is the interest calculated only on the principal amount, not on the interest accrued.

Front

How do you calculate total amount to be paid back with simple interest?

Back

Total Amount = Principal + Interest. First, calculate the interest using the formula, then add it to the principal.

Front

If Emilio borrows $1200 at 8% simple interest for 2 years, how much interest does he pay?

Back

Interest = $1200 x 0.08 x 2 = $192.

Front

What is the total amount Emilio has to pay back after 2 years?

Back

Total Amount = Principal + Interest = $1200 + $192 = $1392.

Front

What is a combination in mathematics?

Back

A combination is a selection of items from a larger set where the order does not matter.

Front

If Darla can choose 3 entrées and 4 sides, how many combinations can she make?

Back

Combinations = Number of Entrées x Number of Sides = 3 x 4 = 12.

Front

How do you solve the equation 3x - 5 = 52?

Back

Add 5 to both sides: 3x = 57. Then divide by 3: x = 19.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value that relates two proportional quantities, often represented as k in the equation y = kx.

Front

If a graph shows a constant of proportionality of 10, what does this mean?

Back

It means for every unit increase in x, y increases by 10.

Front

What is the formula for the circumference of a circle?

Back

Circumference = π x Diameter.