Answer:
D.
Step-by-step explanation:
Rate of change is another way of saying "find the gradient".
Sub any value into the gradient formula.
Answer:
I think it's a or b the picture is fuzzy
Answer:
B. 3x−y=36
Step-by-step explanation:
Multiplying the equation by 3 and subtracting the y-term gives you the desired form.
x = 1/3·y +12
3x = y + 36 . . . . . multiply by 3
3x -y = 36 . . . . . . subtract y to get standard form
_____
Standard form has ...
- only variable terms on the left side
- a positive leading coefficient
- only a constant on the right side
- all coefficients mutually prime, integers where possible
- variables in lexicographical order (optional, I'd say)
Answer:
Step-by-step explanation:
a + c = 321
6a + 4c = 1590
c = 321 - a
6a + 1284 - 4a = 1590
2a = 306
a = 153
c = 168
