I'm assuming you want to know the amount of feet left?
Chris starts with 7/2 feet of wood and removes 8/3. We put both under a common denominator (sixths), getting 21/6 feet of wood and removing 16/6.
Doing the subtraction, we are left with 21/6-16/6=5/6 feet of wood.
Please add a picture or provide the other lengths so that I can solve.
Un cuaderno = $5
Un lapicero = $3
7 cuadernos × $5 = $35
3 lapiceros × $3 = $9
$35+$9=$44
7 lapiceros × $3 = $21
3 cuadernos × $5 = $15
$21+$15=$36
Answer: 68
Step-by-step explanation:
Simplifying the expression:
= 8a² + 6b + 9a² + 9b² + 3b
Collect like terms
= 8a² + 9a² + 6b + 3b + 9b²
= 17a² + 9b + 9b²
We then substitute a=2,b=−1.
= 17a² + 9b + 9b²
= 17(2)² + 9(-1) + 9(-1)²
= 68 -9 + 9
= 68
