In −3z+6b−7, the first term is -3z. It's a variable term, since z is assumed to be a variable. The coefficient of this variable, z, is -3.
Answer:
64
Step-by-step explanation:
height of the hypotenuse:

36 : height = height : x
36 : 48 = 48 : x
x= 48^2/36 = 64
Answer:

Step-by-step explanation:
-5+2(10b-2)=31
Expand brackets.
-5+20b-4=31
-9+20b=31
Add 9 on both sides.
20b=40
Divide both sides by 20
b=2
5 times 1 + 1 times 1/10 + 5 times 1/100 + 3 times 1/1000
The general form is ax²+bx+c=0,
so at least we know b has to be 0. None of the values match unless we multiply everything by 4. That leads to answer B, a=1, b=0 and c=20