if 10 custom engraved pens cost $100, how much will 8 of the same pens cost?

They will cost $80.

Step-by-step explanation:

First, find the out how much 1 pen cost(unit rate).

To do that, divide 100 by 10.

100÷10= 10

So, each pen cost $10.

Now, multiply the cost of 1 pen times 8.

10×8= 80

This concludes that 8 of the same pens cost $80.

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: