A line is perpendiculat to another which has a slope of m if the perpendicular line has a slope of -1/m.
That means that if the product of slopes of two lines is -1, the two lines are perpendicular.
Here, y1=-7/4x, or m=-7/4
The perpendicular should have a slope of -1/m=-1/(-7/4)=4/7
Answer:
c = $7n + $6
Step-by-step explanation:
$6 shipping for any size
$7 per necklace
let n equal the quantity of necklaces and c equal the total cost.
you buy n amount of necklaces and add the shipping cost to find your cost.
Answer:
angel bisector
Step-by-step explanation:
this pic explains why
It can go into 136 4 times. Just do 136 divided by 34. It's even enough to go into it.
Answer:
c =3.9375 hours
Step-by-step explanation:
The formula to determine time to finish the job together is
1/a + 1/b = 1/c
Where a and b are the times to complete the job separately and c is the time to complete the job when working together
1/7 + 1/9 = 1/c
Multiply by 63c to get rid of the fractions
63c*(1/7 + 1/9) = 1/c *63c
9c + 7c = 63
Combine like terms
16c = 63
Divide each side by 16
16c/16 = 63/16
c =3.9375 hours