Answer:
A
Step-by-step explanation:
given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
to find k use the given condition y = 2 when x = 10
k = 
= 
= 
y = x ← equation of variation
when x = 40, then
y = × 40 = 8 → A
For this case, the first thing we must do is define variables.
We have then:
x = Carli's bill
y = Angela's bill
We have then:
"their total bill was $ 109"
x + y = 109
"Carli went over her data limit on her phone, so her share of the bill was $ 15 more than Angela's"
x = y + 15
Answer:
A system of equations that represents this situation is:
x + y = 109
x = y + 15
154 text messages were sent
explanation:
0.25x+7=45.50
subtract 7 from both sides
0.25x=38.5
divide both sides by 0.25
x=154
154 text messages
Answer:
d. median of 1999 data
Step-by-step explanation:
a=10,249.25 (add all the 1998 data then divide by 4)
b=619 (add all 1999 data then divide by 4)
c= 2568 10050 12047 16332
10050+12047/2
d=3026 9904 13063 16546
9904+13063/2
