2 years ago

PLEASE help and explain hoot do this. I need help with 4,5,6

1 answer:

3 0

In front end estimation you use the first two numbers to round

4. 6.14 -> 6.00
9.38-> 9.00
=15.00

5. 39.65-> 40.00
25.84-> 30.00
=70.00
6. 9.71 -> 10.00
3.94-> 4.00
=14.00

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3 years ago

The coordinates of the endpoints of directed line sergeant ABC are A(-8,7) and C(7,-13). If AB:BC = 3:2 then the coordinates of

cestrela7 [59]

The correct answer is A) (1,-5)

Further explanation:

Given points are:

A(-8,7)=(x1,y1)

C(7,13)=(x2,y2)

IT is also given that

AB:BC=3:2

Which means that B divides the line segment in 3:2

Here,

m=3

n=2

To find the coordinates of B

$x_B=\frac{mx_2+nx_1}{m+n}\\ = \frac{(3)(7)+(2)(-8)}{3+2}\\=\frac{21-16}{5}\\=\frac{5}{5}\\=1\\y_B=\frac{my_2+ny_1}{m+n}\\=\frac{(3)(-13)+(2)(7)}{3+2}\\=\frac{-39+14}{5}\\=\frac{-25}{5}\\=-5$