Answer: 18
Step-by-step explanation: You would substitute x for 3 in the expression. This would equal 21-3, or 18 when simplified
Answer:
x = 15 cm
Step-by-step explanation:
All the ratio of corresponding sides should be equal
10 corresponds to x
16 corresponds to 24
12 corresponds to 18
<em>Finding the ratio of the known pairs:</em>
<em>Similarly 10 is to x should be 2 is to 3. Finding x:</em>

So x = 15.
The second matrix system is the correct answer
6.4 Miles
30/4=7.5 (how many minutes it takes Kevin to run a mile)
48/7.5=6.4 (how many miles he can run at a 7.5 mile pace)
Answer:
the radius equals 30
______
_/2827.43
--------- = 30
3.14
it's the square root of the area (2827.43) divided by pie
Step-by-step explanation: