Answer:
139
Step-by-step explanation:
Substitute x for 15.
9(15)+4
Then multiply:
135+4
And then add:
139
A circle
That's a very easy one cuz if u try u will find it to be correct
400 : 1kg
400 : 1000
1 : 2.5
n = 2.5

if you have already covered slopes, you could also get it that way, in fact is simpler that way.
Answer:
14
Step-by-step explanation:
7 times 2 = 14