10. A girl bought 2 rotis and 3 pies for $10.00.1 she had bought 5 rotis and 2 pies she would
have paid $19.50.
(a) Write two equations to represent the infor-
mation given above.
(b) Calculate the cost per roti.
(c) Determine the cost per pie,

rotis?

Step-by-step explanation:

roti = $3.50  pie = $1.00

Step-by-step explanation:

2r+3p = 10     5r+2p = 19.50.      we multiply the whole equation starting with 3p x 2   and 2p x 3   =6p on each equation  4r+6p = 20  then multiply the sae line by either the 2 or the 3 and 15r +6p = 58.50  and when we have add showing each equation to minus + eliminate 6p - 6p = 0  then find  = 11r = 38.50  then divide to find r  =  38.50/11  to show r = 3.5           We then need to find p so use either the original equation to find 5(3.5)+ 2p = 19.50   = 17.5 + 2p = 19.50   = 2p = 19.50 -17.50 =  2p = 2 to show p= 2/2 and p = 1  

the degrees would remain the same ( the number to the left of the decimal point.

the multiply the decimal by 60 to get the minutes and use the numbers to the left of the decimal point.

then multiply the decimal portion of that by 60 for the seconds and round off as needed.

39 .956652

the 39 remains the degrees.

the minutes = 0.956652 x 60 = 57.39912

the minutes = 57

the seconds = 0.39912 x 60 = 23.95 = 24 ( rounded to nearest tenth)

so 39.956652 = 39 degrees, 57 minutes and 24 seconds

-75.159809

the -75 remains the degrees

the minutes = 0.159809 x 60 = 9.58854

the minutes = 9

the seconds = 0.58854 x 60 = 35.31, rounded to nearest tenth = 35.3 seconds

so -75.159809 = -75 degrees, 9 minutes and 35.3 seconds.

the first coordinate is north or south, since it it positive it is north.

the second number is east or west, because it is negative it is west.

39 degrees, 57 minutes and 24 seconds n

-75 degrees, 9 minutes and 35.3 seconds w

ιт ιѕ в. 1/4

ιи (fяα¢тισи/єχα¢т fσям) 1/4

ιи (∂є¢ιмαℓ fσям) .25

нσρє ι ¢συℓ∂ нєℓρ уα