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Y_Kistochka [10]
3 years ago
11

Any help will do I can’t answer 30-35 I’m confused and I keep getting t wrong

Mathematics
1 answer:
vichka [17]3 years ago
8 0
8x - 3 =5(2x + 1)

30) 8x - 3 = 10x + 5  ..............G. Distributive property
31) -2x - 3 = 5 ........................A. Subtraction property
32) -2x = 8..............................B. Addition property
33) x = -4................................F. Division property

34)
3x^3 -5x^2 - 13x + 3 by x - 3

answer
D. 3x^2 + 4x - 1

35)
(0, 1) and (1, 0)

answer is 
y = |x - 1|
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The mean is \mu=85 and standard deviation is \sigma=5. Then the variable X\sim N(85,5).

Use substitution Z=\dfrac{X-\mu}{\sigma}=\dfrac{X-85}{5}, then the variable Z\sim N(0,1).

The probability Pr(X>80) can be calculated in the following way:

for X=80, Z=\dfrac{80-85}{5} =-1 and Pr(X>80)=Pr(Z>-1). From the diagram Pr(Z>-1)=0.34+0.34+0.135+0.025=0.84.

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Point D

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