Answer:
infinitely many
Step-by-step explanation:
Add 12-y to both sides of the second equation to put it into standard form like the first equation:
y +(12 -y) = (x -12) +(12 -y)
12 = x - y . . . simplify
x - y = 12 . . . . second equation in standard form
We see this is identical to the first equation. That means every solution of the first equation is also a solution of the second equation. There are infinitely many solutions.
Answer: 75%
Step-by-step explanation:
Only 9 students have taken fewer than 21 courses
9/12 = 0.75 or 75%
Answer:
Step-by-step explanation:
You need the Law of Cosines for this, namely:
where x is the missing side.
and
so
x = 18.0 or just 18
Answer: 2x5−3x4−8x3+12x2
Step-by-step explanation:
(2x2−3x)(x3−4x)
=(2x2+−3x)(x3+−4x)
=(2x2)(x3)+(2x2)(−4x)+(−3x)(x3)+(−3x)(−4x)
=2x5−8x3−3x4+12x2
=
Answer:
210
Step-by-step explanation:
a(b)(-c) (PLUG IN THE NUMBERS)
7(-2)(-15) (multiply 7*-2)
-14(-15) (multiply them together two negatives make a positive)
210
