Answer:
Step-by-step explanation:
Let x represent his average walking speed.
If the average speed on the bike is 8 mph faster than his walking speed,it means that his biking speed is (x + 8) mph
Distance = speed × time
Alex returns a bike to a friends house from his own house in 1/2 hour. This means that the distance covered is
0.5(x + 8)
He walks back over the same route in 1.5 hours. This means that the distance covered is
1.5x
Since the distance covered is the same, then
1.5x = 0.5(x + 8)
1.5x = 0.5x + 4
1.5x - 0.5x = 4
x = 4 mph
Therefore, the distanceof Alex's house from his friend's house is
4 × 1.5 = 6 miles
Answer:
24
Step-by-step explanation:
All of the students in the last three grade groups scored 70% or better:
11 + 8 + 5 = 24
24 students scored 70% or better.
Answer:
C
Step-by-step explanation:
THe equation given is
2x+2y=16
y=x-4
We put 2nd equation in first equation and first solve for x:

Now, since we know y = x - 4, we substitute x = 6 and get y:
y = x - 4
y = 6 - 4
y =2
The correct ordered pair is (6,2), answer choice C
The one in the top left corner is the answer
imagine the diagonal of a rectangle being the split between two triangles. you are trying to find the longest side of the triangle, which is the "diagonal" of the rectangle.
to find the length of a side of a triangle, use the Pythagorean theorem. it is : a^2 + b^2 = c^2
so... plug in your data like this...
15^2 + 12^2= c^2.
225 + 144 = the square root of 369.
that is rounded to 19.2
this is just how I would solve this problem, if I helped you out please just let me know by voting me brainliest! Haha just kidding :)
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