Isabel tried to evaluate an expression step by step. \quad\begin{aligned} &(2+8)+8 \\ =&2+(8+8)&\green{\text{Step } 1} \\ \\ =&2+0&\blue{\text{Step } 2} \\ \\ =&2&\purple{\text{Step } 3} \\ \\ \end{aligned}
=
=
=


(2+8)+8
2+(8+8)
2+0
2


Step 1
Step 2
Step 3


Find Isabel's mistake.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?