The temperature outside is 50 degrees. if the temperature increases 3 degrees every hour, for how many hours will the temperature be less than 71 degrees?

6 more hours

Step-by-step explanation:

71 - 50 = 21                            

21/3 = 7          

Subtract since 71 is the max

Then, since the answer cannot be equal to 71 but less than 71, the answer is 6.

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: