When 12 is subtracted from 3 times a number, the result is 24. Find the number.
1 answer:
The number of the equation is 12
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X+y=3
xy=-30
x+y=3
minusx
y=3-x
sub
x(3-x)=-30
3x-x^2=-30
times -1 both sides
x^2-3x=30
minus 30 both sides
x^2-3x-30=0
use quadratic
for
ax^2+bx+c=0
x=
1x^2-3x-30=0
a=1
b=-3
c=-30
x=
x=
x=
the numbers are
and
Okay my calculator now says it's 68.
What is the range of the function f(x) = 2x + 1 given the Domain D = {-1, 0, 1, 2}? R = {0, 1, 3, 6} R = {-5, -3, -1, 1} R = {0,
adell [148]
Answer:
calculator
Step-by-step explanation:
X+y=45
2x+5y=120
2(x+y=45)
2x+5y=120
-___________
-3y=-30
y=10 is the answer
I am sorry i do not know the answers