Question

Calculate the area of triangle QRS with altitude ST, given Q (0, 5), R (−5, 0), S (−3, 4), and T (−2, 3).

Answer 1

A- 6.2 square units

B- 7 square units

C- 5.9 square units

D- 5 square units

Answer 2

r u familiar with the distance formula?

Answer 3

yeah

Answer 4

x2−x1)2+(y2−y1)2

Answer 5

@ml1042903

Answer 6

@Mertsj

Answer 7

using that find the lenghts of QR and ST.
Area=(1/2)*QR*ST

Answer 8

Don't know sorry! :( Try @genius12

Answer 9

@britt5 did u find the lengths of QR and ST

Answer 10

i am working on it

Answer 11

oh k. carry on.:)

Answer 12

2

Answer 13

what's 2?

Answer 14

that what i got

Answer 15

for what did u get 2? for the length of QR?

Answer 16

@britt5

Answer 17

yes

Answer 18

it is nt right:(
QR=sqrt((-5-0)^2+(0-5)^2)
=sqrt(25+25)
=sqrt(50)
=5*sqrt(2)

Answer 19

i knew i looked wrong

Answer 20

@ajprincess
so the answer is D- 5 square units

Answer 21

yup:)

Answer 22

Thanks can you help me on some more

Answer 23

ya post them:)

Answer 24

A segment with endpoints I (5, 2) and J (9, 10) is divided by a point K such that IK and IJ form a 2:3 ratio. Find the y value for K.

Answer 25

(A) 4.6
(B) 5.4
(C) 4.8
(D) 5.2

Answer 26

@ajprincess i think it is C 4.8

Answer 27

Write an equation of a line perpendicular to y = 1 over 2x − 5 in slope-intercept form that passes through the point (2, −7).

Answer 28

(A) y= 1 over 2x − 7

(B) y= 2x + 2

(C) y= −2x − 5

(D) y= −2x − 3

Answer 29

@Gabylovesyou

Answer 30

for the last question,
the product of slopes of perpendicular lines is equal to -1.
the slope of the given line is (1/2).
let m be the slope of the required line.
so
m*(1/2)=-1
m=-2
slope intercept form of equation is
y=mx+c
y=-2x+c
plugging the given point will give the value of c
-7=-2*2+c
-7=-4+c
-7+4=c
-3=c

Answer 31

@ajprincess So do yo think the other one is C 4.8
is the last one (D) y= −2x − 3

Answer 32

I am working on the second one. but last one is option D

Answer 33

Ok thanks on the second one i got 3.6 it is equivalent to 4.8

Answer 34

Line IJ has an equation of a line y = 3x − 8, and line KL has an equation of a line y = 3x + 4. These two lines are

A) parallel because the slopes of the lines are the same

B) perpendicular because the product of the slopes is −1

C.) both representations of the same line

D) neither parallel nor perpendicular

Answer 35

C.) both representations of the same line

Answer 36

Write an equation of a line parallel to line EF below in slope-intercept form that passes through the point (2, 6).
A) y = 2x + 3

B) y = 3x + 6

C.) y = negative two over 3x + twenty eight over three

D) y = − two over threex + 6

Answer 37

@ajprincess

Answer 38

for the second one 3.6 or 4.8 is not right:( can u tell me how u workd it out?

Answer 39

may i knw y u say that both represent the same line

Answer 40

For the second one i used a ratio calculator

Answer 41

) perpendicular because the product of the slopes is −1

Answer 42

hmm. r u sure the product of the slopes is -1?

Answer 43

the second one would it be 4.6

Answer 44

nope.

Answer 45

B 5.4

Answer 46

say the total distance between I and J be 5d.
5d=sqrt((9-5)^2+(10-2)^2)
=sqrt(4^2+8^2)
=sqrt(16+64)
=sqrt(80)
=4*sqrt5
then d=(4*sqrt5)/5
the distance between I and K according to the given ratio
2d=(8*sqrt5)/5=sqrt((x-5)^2+(y-2)^2)
the distance between K and J will be
3d=(12*sqrt5)/5=sqrt((9-x)^2+(10-y)^2)
solve these two equations to get y.

Answer 47

5.2

Answer 48

yup

Answer 49

For the line segment whose endpoints are R (1, 2) and S (6, 7), find the y value for the point located 3 over 4 the distance from R to S.
A) 4.25

B) 4.75

C.) 5.25

D) 5.75

Answer 50

before solving this one have u figured out the answer for 4th ques?

Answer 51

no

Answer 52

i only have that one and this one left

Answer 53

find the slopes of the two equations and see if they are equal or the product is -1.

Answer 54

and the question with the picture i still have

Answer 55

I am sry I'v gotta go nw. It's past midnight here.

Answer 56

y = 3x + 4 m=-3
y = 3x − 8 m=-3 A)slope are the same

Answer 57

m=3 nt -3 and yes slopes are same. If the slopes are same they are parallel.

Answer 58

Ok good night thank so much

Answer 59

ill guess on the other ones