Answer:
j=12
Step-by-step explanation:
j/3+5=9
x3 x3
j+15 = 27
-15 -15
j=12
Answer:
B
Step-by-step explanation:
It's easier to explain why the other 3 are wrong.
A is wrong because it is just a standard arithmetic sequence. It adds one every time. That WOULD be correct if it had started at 2, seeing as that is how much it costs to get the bike initially.
C is wrong because although it starts at 2 it adds 2 every hour. It should add 1 instead.
D is wrong because the price is the exact same. It means there is no additional cost for the subsequent hours.
A
a) y+6x=5 if x= -1 then y+6(-1)=5 then y = 11
b) same thing if x = 3 then y+6(3)=5 y+18=5 subtract both sides by -18 and leave y on left then add 5+(-18)= 13 then y=13
B same as above
question (a) asks you to solve for y because x is -2
(b) asks you to solve for x because y is known
3x+2y=-6 if y = 3 you write 3x+2(3)=-6 3x+6=-6 move the +6 over to right side by subtracting 6 from both side 3x=-6 + -6 so 3x=-12 to get rid of the 3 and only leave the x you want to divide both side by 3 then x= -12/3 then the answer would be x=-4
1hr 30 mins= 60mins+30mins=90mins
140$=90mins
In one minute, they make 140/90=14/9
in 9 hours=9*60mins=540mins
540*14/9=840
therefore,they make 840$ in 9 hours
