I’m not extremely good at math but I think you need to make -x-y=1 into y=mx+b form and then solve your new equation!
28$ each calculator
Explanation:
140 / 5 = 28
Answer:

Step-by-step explanation:
Using the rule of exponents
×
=
, then
×
=
= 
54554/99999. I think I am right but sorry if I am wrong.
Answer:
Step-by-step explanation:
b) Diameter of Mercury = 4.88 * 10³ = 4.88 * 1000 = 4880 km
Radius of Mercury = 4880÷ 2 = 2440 km
c) Mass of Jupiter = 1.898 * 10²⁷ = 18.98 * 10²⁶
Mass of Saturn = 5.68 * 10²⁶
Difference = 18.98 * 10²⁶ - 5.68*10²⁶
= (18.98 - 5.68) * 10²⁶
= 13.30 * 10²⁶
= 1.330 * 10²⁷