Is she correct? Why or why not?

No, she is incorrect.

Step-by-step explanation:

equals 8 and equals 9. Mandy probably multiplied the 2 and 3 by the exponent instead of by itself a number of times equal to the exponent. 2^3 is equivalent to 2*2*2, not 2*3. 3^2 is 3*3, not 3*2. Therefore she is incorrect because they are not equal.

351.23

step-by-step explanation:

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1