Ok so this is a problem on my homework and i’m still confused. the ratio of north american butterflies to south american butterflies at a butterfly park is 5: 3. the ratio of south american butterflies to european butterflies is 3: 2. there are 30 north american butterflies at the butterfly park. a. how many south american butter flies are there? b: how many european butterflies are there?

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18