Answer:
8/10,3/4, -3/4,-7/10
Step-by-step explanation:
From greatest to least, they -7/10 and -3/4 is a negative so thats the least because its below zero. 8/10 and 3/4 is positive so thats a decimal. The greatest is 8/10 because if you divide it, it give you .8 and 3/4 is .75. .8 is greater because it refers to 80 and .80 is greater that .75
So you need to do substitution. First solve the easier equation for 1 variable.
x+y=-1 now subtract x to get y=-x-1. Then plug this into the top equation to get 2x+7(-x-1)=2. Next distribute to get 2x+-7x-7=2. Now combine like terms to get -5x=9 so x=-5/9. Now you have to plug this back into the original equation to get y. 2(-5/9)+7y=2, so -10/9 +7y=2. No move terms around to get 7y=28/9 then divide by 7 to get y= 4/9
Answer:
x = 19; y = 19√3
Step-by-step explanation:
sin 30° = opp/hyp
sin 30° = x/38
x = 38 × sin 30°
x = 19
cos 30° = adj/hyp
cos 30° = y/38
y = 38 × cos 30°
y = 38 × √3/2
y = 19√3
