This is equal to:
(8.9*4)(10^4*10^8)
pertinent rule: (a^b)(a^c)=a^(b+c)
(8.9*4)(10^12)
35.6X10^12
3.56X10^13 (and if we kept only significant figures....)
3.6X10^13
7x+2(5x)=-17
7x+10x=-17
17x=-17
x=-1
y=5x=5(-1)=-5
20
90 takeaway 70 equals 20
Answer:
b
Step-by-step explanation:
