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3 years ago

HELP HELP HELP

Mathematics

1 answer:

attashe74 [19]3 years ago

5 0

Answer:

Step-by-step explanation:

Maximum is at (1.5,14).

Minimum is at (4, 0).

y-intercept is at (0, 9)

x intercept is at ( 4, 0).

increasing from x = 0 to x = 1.5 and x = 0 to 6.

decreasing from x = 1.5 to x = 0

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A sample of 100 people is classified by gender (male/female) and by whether they are registered voters. The sample consists of 8

uysha [10]

Answer:

Step-by-step explanation:

Given :

Male Female Total

Registered 60

Non registered 40

Total 20 80

Solution :

N= 100

Formula of expected frequency = $E_{ij}=\frac{T_i \times T_j}{N}$

$E_{ij}$ = expected frequency for the ith row/jth columm.

$T_i$ = total in the ith row

$T_j$ = total in the jth column

N = table grand total.

So, using formula $E_{11}=\frac{T_1 \times T_1}{100}$

$E_{11}=\frac{60 \times 20}{100}$

$E_{11}=12$

$E_{12}=\frac{T_1 \times T_2}{100}$

$E_{12}=\frac{60 \times 80}{100}$

$E_{12}=48$

$E_{21}=\frac{T_2 \times T_1}{100}$

$E_{21}=\frac{40 \times 20}{100}$

$E_{21}=8$

$E_{22}=\frac{T_2 \times T_2}{100}$

$E_{22]=\frac{80 \times 40}{100}$

$E_{22}=32$

Expected frequency table

Male Female Total

Registered 12 48 60

Non registered 8 32 40

Total 20 80

So, the expected frequency for males who are registered voters are $E_{11}=12$

5 0

3 years ago

Which choice is equivalent to the expression below? 6 + 18+3 square root 3- 3 square root 2

Temka [501]

Answer: D: $3\sqrt{3} +\sqrt{6}$

Step-by-step explanation:

$\sqrt{6}+\sqrt{18} +3\sqrt{3}-3\sqrt{2} = \sqrt{6}+3\sqrt{3} \\( 7.64 in alternative form )$

$3\sqrt{3} +\sqrt{6} = 7.64$

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4 0

3 years ago

What property is being used 9+(1+19)=9+_=

nataly862011 [7]

Answer:

20 or(1+19)

(3+17)

(19.5+.5)

there are infinity of choices

4 0

3 years ago

7x + 10y = 96; 5x - 2y = 32

Andrew [12]

Answer:

x=8, y=4

Step-by-step explanation:

7x + 10y = 96

5(5x - 2y = 32)

7x + 10y = 96

25x - 10y = 160

32x = 256

x = 8

7(8) + 10y = 96

56 + 10y = 96

10y = 40

y = 4

3 0

3 years ago

A rectangular container that measures 2 cm x 11 cm x 20 cm is completely filled with water. The water is then poured into a holl

maksim [4K]

Answer:

14cm

Step-by-step explanation:

formula of a rectangular container is LBH and we were given that LBH is 2*11*20 which is equal to 440cm.

Now when the water is transferred into a hollow cylindrical container.the formula for that is 2pierh.440=2*22/7*5*h

440*7=220h

3080=220h

h=14cm

3 0

1 year ago

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