Answer:(-3,-6)
Step-by-step explanation:
-4x+y=6
+ -5x-y=21
_________
-9x. = 27
X= 27/-9
X = -3
-4(-3)+y=6
12+y=6
Y=6-12
Y= -6
To check
-4(-3)+(-6)=6 and -5(-3)-(-6)=21
12-6=6. 15+6=21
6=6. 21=21
They check by our answers
A. Truck A , because of every mile the truck uses 19 gallons.
Answer:
6.
x = 13 isosceles
7.
x= 60 equilateral
Step-by-step explanation:
6.
154 + 13 = 167
180 - 167 = 13
x = 13 degrees
7. 180 / 3 = 60
Calculating the z-score provides additional information regarding how each subject did overall as the z-score takes dispersion into account.
<h3>What is a z score?</h3>
Z-score indicates how much a given value differs from the standard deviation. For example, the mean of a test could be a 73 and if a student scored an 85, that's great.
However, if the data is not spread out, that 85 could be the highest in the class by 10 points. That's much more information than just 15 points above the mean. This way you can tell when someone not only did well but did exceptionally well in comparison to his or her peers.
Learn more about z score on:
brainly.com/question/25638875
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Answer:
Step-by-step explanation:
The amplitude is 6, so A=6.
Also, the midline is y=-3, so C=-3.
The period is 10, so 2pi/k = 10 -> k=5.
Now we need to determine if this is a sine graph or a cosine graph. As the y-intercept is not the value of C, we can determine that this is a cosine graph, and thus y=6cos(5x)-3.