Qno. 7, 11, 13, 17 and 19
Plz help me I have to submit it by tomorrow plss

7) 8/25

11) 9/2 or 4 1/2

13) 23/40

17) 7/6 or 1 1/6

19) 61/10 or 6 1/10

Step-by-step explanation:

Some of the numbers are REALLY hard to read.  Please check that I used the right numbers.

7) Is that 2/3 or 2/5?  I think it’s 2/5.  If so, 2/5x4/5=8/25

11) 3/4÷1/6=3/4x6/1=18/4=9/2

13) 3/8+1/5=15/40+8/40=23/40

17) 1 3/4x2/3=7/4x2/3=14/12=7/6 or 1 1/6

19) 3 1/2+2 3/5=7/2+13/5=35/10+26/10=61/10

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

c: y > - 1/6x + 1

step-by-step explanation:

dashed line - meaning this < or > also not equal

solid line - meaning this < or > also equal

your answer is c because y > means up & it's shaded up, but y < means down

hope this ! : )