Answer:
Step-by-step explanation:
6x - 6 = 7x - 8
-x = -2
x = 2
CJ= 6(2) - 6 = 12 - 6 = 6
JT= 7(2) - 8 = 14 - 8 = 6
6 + 6 = 12 for CT
Answer:
B
Step-by-step explanation:
Euler's formula for polyhedra states that
F + V - E = 2
(F is faces, V is vertices and E is edges )
Here F = 6 and E = 12, thus
6 + V - 12 = 2, that is
V - 6 = 2 ( add 6 to both sides )
V = 8 → B
Class 2 scored better on average
<h3>How to determine which class scored better on average?</h3>
The averages and the standard deviations are given as:
Class 1
Mean score = 7.8
Standard deviation = 1
Class 2
Mean score = 8.1
Standard deviation = 0.2
As a general rule, the smaller the standard deviation; the better the average
Class 2 has a smaller deviation
Hence, class 2 scored better on average
Read more about standard deviation at:
brainly.com/question/28061243
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Answer:
the answer is twenty four
Answer:
y = 10(½)^(x)
Step-by-step explanation:
In writing exponential functions passing through points, we will just substitute the x and y values in each case into y = ab^(x).
Now, for point (-1, 20), the exponential function is; 20 = ab^(-1)
20 = a/b
For the point (1, 5), the exponential function is; 5 = ab^(1)
5 = ab
From 20 = a/b, we have; a = 20b
Thus, putting 20b for a in 5 = ab, we have;
5 = 20b(b)
b² = 5/20
b² = 1/4
b = √(1/4)
b = 1/2
Since a = 20b, then;
a = 20 × 1/2
a = 10
Thus, from y = ab^(x), we have;
y = 10(½)^(x)