Answer:
1 replaces the question mark.
Step-by-step explanation:
5+8+7=20+1=21
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Answer:
-14
Step-by-step explanation:
8x-y²-3
8(-1/4) - (3)² - 3
-2 - (9) - 3
= -14
Answer:

Step-by-step explanation:
using the rule of exponents
=
, then
=
=
= 
The answer in inequality form is t< -6.7
Answer:
5.7*10^-3
Step-by-step explanation: