Li counts 203 stars in the sky. The next night, she counts 178 stars. How many stars in all did she see on the two nights?

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Simplify the expression 10/11(22z) + (a+5) -1

Simplify the expression. -2/5(10+15m-20n)