Answer:
correct. the mean of 72 and 89 is 80?5
Step-by-step explanation:
find the mean to confirm it.
(a+b)/2
72+89= 161
161/2=80.5
Answer:
3/2
Step-by-step explanation:
formula k = y/x
comes from
y = kx
k = constant of variation
when y = 3 , x = 2
k = 3/2
Another way to write this is:
x = 23y + 5
xy = 6732
Now plug in the first equation into the second:
(23y + 5)y = 6732
23y^2 + 5y - 6732 = 0
Either use quadratic equation or factor:
(y - 17)(23y + 396) = 0
y = 17 or -396/23
You know you can automatically eliminate the second y because it's negative and you need the two integers to multiply to a positive number (6732).
Plug y = 17 back into either equation (second might be easier):
17x = 6732
x = 396
5+4b≥32
7 Packages of bracelets.
Solve It
5+4b≥32
subtract 5 from both sides
4b≥27
divide 4 on both sides
b≥6.75
Since you can't buy a half packet you round up to 7
can I have the brain crown thing
Answer:
Plug -1.8 into each x so the equation would become (-1.8)^2 - 3(-1.8)
Step-by-step explanation:
