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3 years ago

The table shows the number of windows and the number of panes of glass in the windows. Jim predicts

Mathematics

1 answer:

marshall27 [118]3 years ago

7 0

Answer:

no his prediction is not correct. there would be 90 window panes

Step-by-step explanation:

12 panes in 2 windows so 1 window has 6 panes. multiply the 15 windows by 6 panes to get the total of 90 panes

12/2=6

6x15=90

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Part of the graph of the function f(x) = (x – 1)(x + 7) is shown below. Which statements about the function are true?

BaLLatris [955]

Answer:

the answers are B,C,D

Step-by-step explanation:

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3 years ago

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What are the new coordinates of (10,3) reflected along the x axis?

Anon25 [30]

Answer:

(10,-3)

Step-by-step explanation:

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2 years ago

Solve the system.

liraira [26]

Answer:

Option D is right,.

Step-by-step explanation:

-a+4b+2c=-8 ... i

3a+b-4c=9 ... ii

b=-1 ... iii

Substitute the value of b, in i and ii

-a-4+2c =-8 or -a+2c = -4

and 3a-1-4c = 9 or 3a -4c =8

Now we have two equations in two variables

-a+2c =-4 and 3a-4c =8

a = 2c+4: substitute this in the other equatin.

3(2c+4)-4c =8 Or 2c +12 =8

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a = -2+4 =2

a=2, b=-1 and c =-1 is the solution.

6 0

3 years ago

7. A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The T

Anit [1.1K]

Answer:

Modification has not reduced the number of accidents.

Step-by-step explanation:

$H_0: \mu\geq0\\H_a:\mu$

A B C D E F G H

Before modification 5 7 6 4 8 9 8 10

After modification 3 7 7 0 4 6 8 2

Difference -2 0 1 -4 -4 -3 0 -8

Mean of differences $M_d = \frac{sum}{8}=\frac{2+0-1+4+4+3-0+8}{8}=2.5$

Standard deviation of differences = $\sqrt{\frac{\sum(x-\bar{x})^2}{n}}=2.9277$

Formula of paired t test :

$t=\frac{M_d}{\frac{s}{\sqrt{n}}}\\t=\frac{2.5}{\frac{2.9277}{\sqrt{8}}}\\t = 2.4152$

Df = n-1 = 8-1 =7

$t critical = t_{(df, \alpha)}=t_{7,0.01}=2.998$

t critical> t calculated

So, We failed to reject null hypothesis

Hence modification has not reduced the number of accidents.

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3 years ago

What is the area of triangle UVW? (Scale factor question picture included)

Marta_Voda [28]

A= 320 cm2 and that is the answer

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3 years ago