Answer:
see below...
Step-by-step explanation:
-12=constant [# doesn't change]
4=degree [exponent]
-6m= term [variable or 3]
9=coefficient [first #]
Answer:
4x + y = 43
Step-by-step explanation:
The equation of a line in standard form is
Ax + By = C ( A is a positive integer and B, C are integers )
Given
y = 43 - 4x ( add 4x to both sides )
4x + y = 43 ← in standard form
<span>Dr. Graham currently has two acid solutions.
60% acid AND 20% acid </span>
Dr. Graham needs 30 L of a 50% acid solution
We set up 2 equations in which s = 60% acid and t = 20% acid
A) s + t = 30
B) .60s + .20t = (.50 * 30)
We multiply equation A by -.20
A) = -.20s -.20t = -6 then we add it to B)
B) .60s + .20t = 15
.40s = 9
s = 22.5
t = 7.5
So, she needs to mix 22.5 liters of 60% acid with 7.5 liters of 20% acid.
Source:
http://1728.org/mixture.htm
Answer:
x=3
Step-by-step explanation:
6x-3
(6*3)-3
18-3
15
3x+6
(3*3)+6
9+6
15
5x
5*3
15
