Answer: C
Step-by-step explanation:
x-3y=5, y=x-7 *solve it
the answer is (8,1)
so..
C. (8,1) is a solution to both equations so it is a solution to the system
Answer:
Comparing means from dependent samples.
Step-by-step explanation:
In the scenario described above, the 25 sampled individuals were used to test the effect of weightlifting on alleviating back pain. The samples used were not changed nor altered during the study as the same subjects who were tested to measure their level of pain before lifting weight were the same group subjected to the actual weight lifting test and again had their level of pain tested. Since only one group was involved in the study ( a single group was tested on neutral and actual treatment). Hence, the study used dependent samples to compare the average level of pain.
Answer:
minimum = $445
median = $565
standard deviation = $38
IQR = $48
Step-by-step explanation:
The minimum and the median are measures of location and are affected during addition (or subtraction) and multiplication (or division).
Satandard deviation and IQR (inter-quartile range), which are measures of dispersion, are affected by only multiplication (or division).
For the weight,
<em>minimum </em>= 920 pounds
<em>median </em>= 1160 pounds
<em>standard deviation</em> = 76 pounds
<em>IQR </em>= 96 pounds
For the price,
<em>minimum </em>= 0.50(920) - 15 = $445
<em>median </em>= 0.50(1160) - 15 = $565
<em>standard deviation</em> = 0.50(76) = $38............(<em>Subtraction discarded</em>)
<em>IQR </em>= 0.50(96) = $48........................................(<em>Subtraction discarded</em>)
Answer:
2.75
Step-by-step explanation:
275% = 2.75 in decimal form. Percent means 'per 100'. So, 275% means 275 per 100 or simply 275/100. If you divide 275 by 100, you'll get 2.75 (a decimal number)
Step-by-step explanation:
f(x) = 1/2 x é uma função do 1° grau com coeficiente linear=1/2.