Answer:
1. 8.4 2. 15
Step-by-step explanation:
1. 4x + 8y = 40
when y = 0.8
4x + 8 × 0.8 = 40
4x = 40 - 8 × 0.8
4x = 40 - 6.4 = 33.6
....x = 33.6 / 4 = 8.4
2. 3a + b = 54
when b = 9
3a + 9 = 54
3a = 54 - 9
3a = 45
.....a = 45 / 3 = 15
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Response:
The number 40 can be found in Pattern B. Additionally, following the rule, each sequence will expand.
Detailed breakdown:
Let’s build each sequence. Recall that the guideline is to "add 15" to generate each sequence starting from the provided initial number.
Pattern A.

Pattern B.

Pattern C.

You can see that the number 40 appears in Pattern B. Moreover, per the rule, each pattern will show an increase.
Answer: 26.3 mm
Step-by-step explanation:
The two-standard deviations rule for outliers states that any value lying outside two standard deviations from the average is considered an outlier.
Given that the Mean is 23.5 millimeters (mm) and the standard deviation is 1.4 mm
The maximum thickness that should be reviewed = mean + 2 (standard deviation)
= 23.5 + 2(1.4)
= 23.5 + 2.8
= 26.3 mm
therefore, the maximum thickness warranting machine configuration review by the statistician = 26.3 mm.
Calculating gives us 73 - 27 = 46
Next, 46 / 100 × 2628 = 1208
Adding together gives 2628 + 1208 = 3836
Response:

A quadratic equation has solutions of 6 and -2.
Thus, if the variable is denoted by X, the factors of the polynomial function will be (X - 6) and (X + 2).
Thus, the equation can be represented as
(X - 6)(X + 2) = 0
⇒

If the leading coefficient is 3, we can express the equation as
(Response)