The graph that has a slop of -1 and the y-interecept is 4
that graph is the 1st picture and top one
Answer:
The equation is c=25h+30 and the answer is 205
Step-by-step explanation:
Plug in 7 for h.
Answer:
1.65 per kg
Step-by-step explanation:

let the solution be 
let the solutions be a = 3, b = 1
is the equation with consistent value.
Answer: 9.70%
Step-by-step explanation:
The formula to find the percentage error is given by :-

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g
Estimated mass of zinc oxide used by pharmacist =31.1 g
Now, 
i.e. 
i.e. 
Hence, the percentage of error on the basis of the desired quantity.= 9.70%