Answer:
No it is not a good sample because if a person works full time then he would be at work around that time.
Step-by-step explanation:
The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. [beep] A single lap should be completed each time you hear this sound. [ding] Remember to run in a straight line and run as long possible. The second time you fail to complete a lap before the sound. Your test will begin on the word start. On your mark, get ready, start<span>
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11 by 16
Explanation:
Set up two equations
2
x
+
2
y
=
54
x
×
y
=
176
Solving the first equation for x
2
x
+
2
y
−
2
y
=
54
−
2
y
this gives
2
x
=
54
−
2
y
Divide both sides by 2
(
2
x
2
)
=
54
−
2
y
2
This gives.
x
=
27
−
y
putting this value into the second equation gives.
(
27
−
y
)
×
y
=
176
multiplying across the parenthesis gives
27
y
−
y
2
=
176
subtracting 176 from both sides gives
is
27
y
−
y
2
−
176
=
0
multiplying by negative one gives
−
27
y
+
y
2
+
176
=
0
factoring this into y gives
(
y
−
11
)
×
(
y
−
16
)
=
0
Solving for both y's gives
y
=
11
,
y
=
16
Answer:
Your answer is E.
Step-by-step explanation:
Answer:
Sometimes
Step-by-step explanation:
Lets see
Let x be a positive number
x=3
|3| = 3
True
Let x =0
|0| = 0
True
Let x be a negative number
x=-3
|-3| =-3
3 = -3
False
So this is sometimes true
