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ra1l [238]
3 years ago
10

Expand and simplify (x-2)(2x+3)(x+1)

Mathematics
1 answer:
Anna [14]3 years ago
8 0
2x3 + x2 - 7x - 6 the 3 is supposed to be at the top.
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The U.S. Federal Seed Act establishes germination rates for various fruit and vegetable seeds. Watermelon seeds are to meet a 70
babymother [125]

Answer:

Following are the responses to the given question:

Step-by-step explanation:

Level of Significance,\alpha =    0.05

Sample Size, n =    120          

Sample Proportion,   \hat{P} = 0.600      

z -value =   Z_{\frac{\alpha}{2}} =  1.960  \ \  [excel formula =NORMSINV(\frac{\alpha}{2})]

Standard ErrorSE = \sqrt{\frac{\hat{p}(1-\hat{p})}{n}} =    0.0447        

margin of error E = Z\times SE =    1.960   \times   0.0447   =   0.0877

When 95\% Confidence Interval              

Interval Lower Limit= \hat{p} - E =    0.600   -   0.0877   =   0.5123

Interval Upper Limit =\hat{p}+ E =   0.600   +   0.0877   =   0.6877

7 0
2 years ago
The scores on an exam are normally distributed, with a mean of 85 and a standard deviation of 8. What percent of the scores are
dedylja [7]

Answer:

16%

Step-by-step explanation:

Find the z-score.

z = (x − μ) / σ

z = (93 − 85) / 8

z = 1

This means 93 is one standard deviation above the mean.

According to the empirical rule, 68% of a normal distribution is between -1 and +1 standard deviations.  So 32% is either less than -1 or greater than +1 standard deviations.  Normal curves are symmetrical, so 16% is greater than +1 standard deviations.

6 0
2 years ago
I need the answer please
katrin [286]

Answer:

Second option: DE

Step-by-step explanation:

Since Triangle ABC is congruent to Triangle DEF

Then AB is congruent to DE

hope this helps and is right. p.s. i really need brainliest :)

5 0
2 years ago
Read 2 more answers
30 points pls answer
Bad White [126]
A) 2 * 3 * 4 = 24

b) (2 * 3 + 2 * 4 + 3 * 4) * 2 = 52
6 0
3 years ago
Read 2 more answers
What is the value of the dependent variable if the value of the independent variable is -4?
Radda [10]
The independent variable would be x, as it depends on nothing to determine its value. The dependent variable is f(x), as it depends on x to determine its value. This means we plug -4 into x and solve the equation to find f(x).
f(x) = -5(-4) + -4/-2
f(x) = 20 + 2
f(x) = 22

So the answer is C.
3 0
3 years ago
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