8. 7. The ratio of the weight of cement to the weight of sand in a concrete mixture is 1:3. Complete the table to show different weights of cement or sand in the concrete mixture. *set up proportions *cross multiply and divide find unknown Ang abnyirds Pounds of Cement Pounds of Sand trepecti 1 3 2 12 9 ibs of cament 16 of cand ibs of cement lbs of sand

it would be 6xy and -16xy.

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

answer: 1.06 km per sec

step-by-step explanation:

39.6 m=63.72 km

60 min in an hour so 63.72/60=1.06

5.7622

step-by-step explanation:

the ten thousandths place is the 2. you round it up if, that number in whatever place is 5 or higher.