How many solutions does the system have?
y = x + 1
y = 2x - 5

How many grams must be adde to 970g to make 1 and a half kg

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.