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2 years ago

Beginning at 10:30 A.M., tours of the National Capitol and the White House begin at a

Mathematics

1 answer:

Mila [183]2 years ago

8 0

The least common multiple of 12 and 15 is 60. Every hour the tours leave at the same time.

The tours will leave at the same time at 11:30, 12:30, ...

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Solve this plsssssss

Naddik [55]

Answer:

On the x-axis, plot to the left at -4.

From the point -4, go up 1 and to the LEFT 2.

When you draw yours line, it is a dashed line so leave a little space in it.

Then you should shade above the line.

4 0

2 years ago

Can someone help me with this question????

frutty [35]

Answer:

Hi! I think I got the answer, it is a tricky one! The answer I got was C) 1029.

Step-by-step explanation:

1. It is good to first know that 40%more means 1.4 (some number). So, if n is 40% more than the sum of the other three numbers: n= 1.4* (l +m+p) .

2. Also note that: n+l+m+p= 1764; so, n = 1764-l-m-p.

3. Since we have two expressions for n, we can equate them to each other. Giving, 1.4* (l +m+p) =1764-l-m-p . Simplifying we get 2.4 (l +m+p)=1764.

4. l +m+p =1764/2=735.

5. 1764-735=1029

Hope that helps! Feel free to message back if there are any questions!

7 0

2 years ago

What is the surface area of a 96 square foot box if it is scaled up by a factor of 10?

Nikitich [7]

sixty nine thousand and four hundred

8 0

3 years ago

Professor Isaac Asimov was one of the most prolific writers of all time. Prior to his death, he wrote nearly 500 books during a

svp [43]

Answer:

Step-by-step explanation:

n = sample size = 5

a) Let us determine the sum

$\sum x_i= 100+200+300+400+490=1490$

$\sum x_i^2= 100^2+200^2+300^2+400^2+490^2=540100$

$\sum y_i = 237+350+419+465+507=1978$

$\sum y_i^2= 237^2+350^2+419^2+465^2+507^2=827504$

$\sum x_i y_i=100 \times 237 + 200\times350+300 \times 419 + 400 \times 465 + 490 \times 507=653830$

Now we can determine $S_x_x, S_x_y, S_y_y$

$S_x_x = \sum x_i^2-\frac{(\sum x_1)^2}{n} \\= 540100 - \frac{1490^2}{5} \\= 96080$

$S_x_y = \sum x_i y_i -\frac{(\sum x_i)(\sum y_i) }{n} \\\\$

$653830 - \frac{1490 \times 1978 }{5} = 64386$

$S_y_y = \sum y_i^2-\frac{(\sum y_i)^2 }{n} = 82750-\frac{1978^2}{5} \\\\= 45007.2$

The estimate b of the slope β is the ratio of $S_x_y$ and $S_x_x$

$b = \frac{S_x_y}{S_x_x}$

$\frac{64386}{96080} = 0.67$

The mean is the sum of all value divide by number of values

$\bar x= \frac{\sum x_i}{n} \\\\= \frac{100+200+300+400+490}{5} \\\\= \frac{1490}{5} = 298$

$\bar y= \frac{\sum y_i}{n} \\\\= \frac{237+350+419+465+507}{5} \\\\= \frac{1978}{5} = 395.6$

The estimate a of the intercept is

$a = \bar y - b \bar x$

$= 395.6 - 0.69 \times 298\\= 195.9$

General least square equation;

$\bar y = \alpha + \beta x$

replace alpha by a = 3 and beta by b = 0.67 in general least equation

y = a + bx

195.9 + 0.67x

Scatter plot is shown in the attached file

x is on the horizontal axis

y is n the vertical axis

The degree of freedom of regression is 1

because we use one variable s predictor variable

$d_f_R = 1$

The degree of freedom of error is the sample size n decrease by 2

$d_f_E =n-2= 5 - 2=3$

Total df is equal to the sum of seperate degree of freedom dfR and dfE

total df = 1 +3 4

$SSR = \frac{(S_x_y)^2}{S_x_x} = \frac{64386^2}{96080} \\\\= 43146.9296$

Total SS =Syy= 45007.2

SSE + Total SS = SSR

= 45007.2 - 43146.9296

= 1860.2705

7 0

3 years ago

8÷ what equal to 1644

seropon [69]

13152 divided by 8 equals 1644

1644 times 8 and then you would get your answer which is 13152

8 0

2 years ago

Read 2 more answers