Solve the system with substitution

2.5x-3y=-13

3.25x-y=-14

Four laps around the track equals one mile. How many miles does sixteen laps equal?

Use these clues to guess the mystery number. It is an odd number. It is greater than 142. It is less than 156. Rounded to the nearest ten, the rounded value is less than the mystery number.

Where does f (x) = 3x² - 11x - 4 intersect the x-axis? The negative x-intercept is at ( The positive x-intercept is at ( ,0).

Simplify 11 x - 7 - 3 x + 4

What is the simplified form of each expression? 1.7m + 6.5n - 4n + 2. rn^2 - n

The cost of 12 oranges is $1. What is the cost of 3 dozen oranges?

The product of - 2 and a number is at most 10. Find the possible numbers ≤ - 5 n > - 5 n < - 5 n ≥ - 5

Gia went to the movies with her 7-year old daughter and her 70-year-old mother. Movie tickets are half-priced for children under 12 years old, and there is a 25% discount for senior citizens. If Gia's $8.

The circumference of the circle shown below is 75 inches. Which expression gives the length in inches of?

To the nearest tenth, find the perimeter of triangle ABC with vertices A (3, 2), B (-2, 3), and C (2, 6)