Think this is the proper way not for certain. I hope it helps.
Answer:
C
Step-by-step explanation:
Answer:
Based on what I see, it would be D.
Step-by-step explanation:
Because the x-side is +1 all the way down and the y-side is +5 for all.
So:
x-side (+1): 1+1 =2 / 2+1=3 / 3+1=4
y-side (+5): -5+5=0 / 0+5=5 / 5+5=10
Mult. the 2nd eqn by 6 and then add this "new" equation to the 1st given eqn:
-6x + y = -2
6x -18y = 54
--------------------
-17y = 52, or y = -52/17. Subst. this value of y into either equation to find the value of x.
Answer:
6) Option 4
7) Option 4
8) Option 1
Step-by-step explanation:
1.31×(10^-5) = 1.131/10⁵
= 1.132/100000
= 0.00001132 (option 4)
7) 3.76×10⁴ + 5.5×10²
10²(3.76×10² + 5.5)
10²(376 + 5.5)
10²(381.5)
10²(3.815×10²)
3.815×10⁴ (option 4)
8) (4×10³)(5×10⁷)
4×10³×5×10⁷
4×5×10³×10⁷
(4×5)(10^(3+7)
(4.5)×(10^(3+7)) (option 1)
That . represents multiplication
Further simplified below:
20×10¹⁰
2.0×10¹¹