Answer:
1. Y
2. N
3. N
4. N
Step-by-step explanation:
Let's use the second equation, since it seems to be easier to use.
To check if an ordered pair is a solution, plug it in to the equation.
1. 
--> Y
2. 
--> N
3. 
--> N
4. 
--> N
Edit : The 4th equation doesn't work for the first equation, whereas the first one still does.
Answer: He can predict that 420 students will be in support of the purchase.
Step-by-step explanation:
Since Randy surveyed one student out of every 5 he came across in the cafeteria, it means that if he came across five people, he will survey one, if he came across ten students, he will survey 2 and so on.
If then he surveyed a total of 140 students, then we can actually multiply the number by 5 to know the exact number of students he possibly came across in the cafeteria:
= 140 × 5
= Total of 700 students
If 84 out of the surveyed students supported the purchase, we can find what that figure represents in the total number of students in the cafeteria:
84/140 = x/700
We cross multiply
140 × X = 84 × 700
140X = 58,800
X = 58,800/140
X = 420 students
Therefore, he can predict that 420 students out of a total of 700 students in the cafeteria will be in support of the purchase of the P.E equipment
Answer: Old selling price is $170 and new selling price is $159.12
Step-by-step explanation:
Given Cost Price , CP=$136
<u>For old selling price</u>
Selling Price(SP) = Cost Price(CP) + Markup Value(MV)
Now MV= 
=>SP = $136+$34=$170
Thus old selling price is $170
<u>For new selling price</u>
New Markup Value(NMV) = 
=>New Selling Price , NSP= $136+$23.12=$159.12
Thus new selling price is $159.12
$16,750 -$2,870 -$800 = $13,080
Biweekly means she is paid 26 times a year.
$13,080 ÷ 26 = 503.0769231
b. $503.08
Answer:
all work is shown and pictured
