14x45=630
43×2=86
(14×45)-(43×2)= 630-86=544
there would be 544 pens left
Answer:
Step-by-step explanation:
can you show a picture?
The formula is y2 - y1/x2 - x1. The answer would be 3/4 once simplified.
Answer:

Step-by-step explanation:
Using the rule of exponents
⇔ 
Evaluating from the inside parenthesis outwards
= -
× -
=
, then
=
= 9² = 81 , then
= 
Answer:
Estimate one digit past the smallest precisely known digit or marking
Step-by-step explanation:
To determine the last digit in any measured number : Estimate one digit past the smallest precisely known digit or marking
This is employed mostly when trying to round off a measured or calculated number to a precise number of digits and in other to determine the last digit in the given number we will have to estimate one digit past the smallest precisely known digit