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salantis [7]
3 years ago
6

If B is a point on AC and AB:BC = 1:2, what are the coordinates of B?

Mathematics
2 answers:
AlexFokin [52]3 years ago
7 0
-1/2 left and down 4

So it's #2
tatiyna3 years ago
3 0

We have to use the segment formula which is

( \frac{mx_{2} + n x_{1} }{m+n},  \frac{my_{2} + n y_{1} }{m+n})

Where m :n is the ratio.

Using this formula, we will get

( \frac{1*4 +2(-5)}{1+2} , \frac{1(-10)+2*2}{1+2})

And on simplifying , we will get

( \frac{4-10}{3} , \frac{-10+4}{3}) = (-2,-2)

Therefore the correct option is 1 .

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PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
noname [10]

Answer:

1. x = - 1 -y over 2

2. x = -4(2+y) over 3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Let f(x)=x2−2x−4 . What is the average rate of change for the quadratic function from x=−1 to x = 4?
goblinko [34]

Answer:

The average rate of change for f(x) from x=−1 to x = 4 is, 1

Step-by-step explanation:

Average rate A(x) of change for a function f(x) over [a, b] is given by:

A(x) = \frac{f(b)-f(a)}{b-a}

As per the statement:

f(x) = x^2-2x-4

we have to find the average rate of change from x = -1 to x = 4

At x = -1

f(-1) = (-1)^2-2(-1)-4 = 1+2-4 = -1

and

at x = 4

f(4) = (4)^2-2(4)-4 = 16-8-4 = 4

Substitute these in [1] we have;

A(x) = \frac{f(4)-f(-1)}{4-(-1)}

⇒A(x) = \frac{4-(-1)}{4+1}

⇒A(x) = \frac{5}{5}

Simplify:

A(x) = 1

Therefore, the average rate of change for f(x) from x=−1 to x = 4 is, 1

4 0
3 years ago
Read 2 more answers
Change 7/5 to a whole number
Harlamova29_29 [7]
Write it as a mixed fraction 7/5 = 1 2/5
5 0
3 years ago
In Exercises 6 and 7, use the given measure to find the missing value in each data set. 6. The mean of the ages of 5 brothers is
strojnjashka [21]

Solution

Problem 6

For this case we can do this:

12, 16,__, 14, 8, 7

We can solve for x like this:

\frac{12+16+x+14+8+7}{6}=13x=13\cdot6-(12+16+14+8+7)=21

Problem 7

F

7 0
1 year ago
1) Evaluate the following expressions.show your work <br> a) 7(m - 8) for m = -4
Akimi4 [234]

Answer:

-84

Step-by-step explanation:

Since m=-4, we can plug -4 into the expression and use PEMDAS

7(m - 8)

7((-4)-8)

7(-12)

-84

4 0
3 years ago
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