helpmewithmath70
20.11.2019 •
Mathematics
Lily and rosie are sister the sum of their ages is 19 and the positive difference of their ages 9 set up a system of equations involving lindsay's age, l, and roses age, r, assuming the lily is the older child solve the system to find their ages
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Ответ:
L-R=9
2L=28
L=14
(14)+R=19
R=5
L=14
R=5
Check:
(14)+(5)=19
(14)-(5)=9
Ответ:
Let's call the distance between the moon and sun as z. The scientist can calculate the numerical value of sin x° and then write sin x° as y / z. They can then set the numerical value of sin x° equal to y / z and then solve for z.