At Marie's school, 65% of the students are learning a second language. There are 143 students learning a second language. How many students are
in Marie's school?

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

The area of a circle is equal to 1 dm². find the radius of the circle.

Solve the following system of equations express your answer as an ordered pair in the format (a, b) with no spaces between the numbers of symbols 5x+2y=22