Answer:
Noah types faster
Step-by-step explanation:
Andre's typing speed per minute - 52 words per minute
= 52
Noah's typing speed per minute - 57 words per minute
= 57
For this case we must resolve the following inequality:

Adding 7 to both sides of the inequality:

Different signs are subtracted and the major sign is placed.

Thus, the solution is given by all the values of "x" less than -5.
The solution set is: (-∞, - 5)
Answer:

See attached image
Answer:
Opt. 1 -3 ≤ x ≤ 3
Step-by-step explanation:
Inequalities are regions, the attached picture shows us a region located between -3 and 3, the dots used are solid, this means that the value '3' is include in the region.
Hence the variable is narrowed to -3 and 3.
Answer:
Jonas would pay $30.76 dollars
Step-by-step explanation:
$25.00 + 7% + 15% = 30.7625
So we would have to round it so it would be $30.76.
y = cost = $25
25 = 0.75 +10
subtract 10 from each side
15=0.75x
x = 15/0.75 = 20
there were 20 words in the ad