MATHEMATICS HIGH SCHOOL

Select the following numbers that cannot represent the area of a polygon.a. 68
b. 40
c. -5
d. square root 30
e. 0
f. -200

Answers

Answer 1
Answer: c. -5
e. 0
f. -200

Area cannot equal zero or a negative number
Answer 2
Answer:

Answer: The answer is (c) - 5, (e) 0 and (f) - 200.

Step-by-step explanation:  We are to select the correct numbers from the given options that cannot represent the area of a polygon.

We know that the area of any figure cannot be a negative number or zero.

So, the numbers which cannot represent the area of a polygon are - 5, 0 and - 200.

Thus, (c), (e) and (f) are the correct options.

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What are the solutions to the quadratic equation x2 – 16 = 0?x = 2 and x = –2 x = 4 and x = –4 x = 8 and x = –8 x = 16 and x = –16
Select the x-coordinate of the vertex of the parabola defined by the function f(x)=-9x^2+7x+8
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A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television each weekday to be 2.7 hours with a standard deviation of 0.4 hours. Jonathan believes that his football team buddies watch less television than the average American. He gathered data from 15 football teammates and found the mean to be 2.3. Which of the following shows the correct z-statistic for this situation?

Answers

Answer:

Z Test = -3.87298

p= .0001

Then the results are significant at p values < 0.1

Step-by-step explanation:

To answer this question we have to consider some things.

1) The Mean of Population is given by this formula:

\mu =(\sum X_(i))/(N)\; \mu=2.8

The Population Standard Deviation is given by this formula:

\sigma =\frac{\sqrt{(x_(i)-\mu)^(2)}}{N}\: \sigma=0.4

On the other hand, the Team buddies are a sample of this population, whose mean is:

\bar{x} = (\sum x_(i) )/(n)=2.3

The Sample Standard Deviation is given by this formula:

\S =\frac{\sqrt{(x_(i)-\mu)^(2)}}{N-1}\: \s=

The Z test shows us the validity of the results.

2)

For the Z test we need the Variance \sigma ^(2)

Z = (M - μ) / √(σ2 / n)

Z_(score)=\frac{2.3-2.7}{\sqrt{(0.16)/(0.15)}}\nZ_(score)= -3.87298

3)

Z Test = -3.87298 standard deviation units, since it's a negative value is 3.897 below the mean.

p= .0001 the p value.

Then the results are significant at p values < 0.1

Answer:

-3.87...just took the test and got this question right

What multiplys to 40 and adds to -13

Answers

-5 and -8 both multiply to 40 -5 x -8 = 40 and both add up to -13. -5 + -8 = -13. two negative numbers when added together the answer is still negative. ex: if i owe 2 dollars to someone and 2 to another i owe 4 in total
We know that both of our numbers will need to be negative so that they multiply to get a positive number (the double negatives cancel) but add to get a negative one.
Consider factor pairs of 40.

-40 × -1 = 40 (adds to -41)
-20 × -2 = 40 (adds to -22)
-10 × -4 = 40 (adds to -14)
-5 × 8 = 40 (adds to -13)

Your numbers are -5 and -8.

4X + 5Y = 21
-4X + 8Y = -8
And
X + 5Y = 5
3X - 5Y = 3

Answers

Answer:

for the first one

Step-by-step explanation:

(x,y)=(4,1)

Is -55.505 a rational number?

Answers

Answer:

yes

Step-by-step explanation:

Any number that can be written in p/q from is a rational number

Given the following system of equations, identify the type of system.x + 2y = 6
3x + 6y= -9
A. Consistent
B. Inconsistent
C. Equivalent

Answers

Answer:

The two lines in the graph are parallel, so it is B. Inconsistent since there is no solution.

Answer:

the answer would be B inconsistent

The product of d and 4

Answers

Answer: 4d

Step-by-step explanation:

Product means multiplication, so the product of d and 4 means d times 4.
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