Ask question

Ask question

All categories

3 years ago

5

Cho tam giác ABC có AB =4cm ,AC=5cm,BC=6cm.Trên tia đối của tia AB lấy điểm D sao cho AD=5cm a) chứng minh : tam giác ABC đồng d

ạng với tam giác CBD b) tính CD

1 answer:

pshichka [43]3 years ago

7 0

Answer:

meta beta

Step-by-step explanation:

diem ryugudnhkng.

You might be interested in

Create and equivalent expression using the distributive property for 5(3s-2)

maxonik [38]

If I read your question right, an equivalent expression would be 15s-10 after distributing the 5.

3 0

3 years ago

What is the ratios 15cm: 5m lowest term?

stepan [7]

You divide both numbers by their largest common factor, which is 5 in this case.
15(/5):5(/5)
3:1

6 0

3 years ago

Put the following equation of a line into slope-intercept form, simplifying

Delicious77 [7]

Slope intercept form :
y= -4/3x -2

6 0

4 years ago

A 90 percent confidence interval for the slope of a regression line is determined to be (-0.181, 1.529). Which of the following

GenaCL600 [577]

Answer: a. The correlation coefficient of the data is positive.

Step-by-step explanation:

Estimated slope of sample regression line = $\dfrac{Upper \ limit + lower\ limit}{2}$

Here , confidence interval : (-0.181, 1.529)

Estimated slope of sample regression line = $\dfrac{-0.181+1.529}{2}$

$=\dfrac{1.348}{2}\\\\=0.674\ \ \ \ [\text{ positive}]$

⇒Correlation coefficient(r) must be positive, So a. is true.

But, d. and e. are wrong(0.674 ≠ 0 or 1.348).

We cannot check residuals or its sum from confidence interval of slope of a regression line, so b is wrong.

We cannot say that scatterplot is linear as we cannot determine it from interval, so c. is wrong

So, the correct option : a. The correlation coefficient of the data is positive.

7 0

3 years ago

How can you determine which of two lines will be steeper from

Romashka-Z-Leto [24]

Well on a table of data, if the y coordinates increase a lot over a short x distance then it will be steep.

In an equation, you would put it into y = mx + b form and whatever your m is will be your slope. If m is large, it will be steep.

8 0

3 years ago