7b/12=4.2
7b=50.4
b=7.2
hope this helps
Answer:
x is the reciprocal of the difference of a and b.
Step-by-step explanation:
ax=bx+1
Subtract by bx on both sides
ax-bx=1
x(a-b)=1
x= 1/(a-b)
Answer:
cos x (2 sin x − 1)
Step-by-step explanation:
sin(2x) − cos x
Use double angle formula.
2 sin x cos x − cos x
Factor.
cos x (2 sin x − 1)
Answer:
0.642 is the answer please give brailiest
8*5=40
2/5= 16/40
3/8= 15/40
1 16/40-15/40= 1 1/40
1 1/40 is the final answer.
I hope this helps!
~kaikers