which of these story problems describes the sum 19 + (-12)? check all that apply. show your work to justify your answer.
1
2. is the right answer
3
<span>Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What is this number expressed in scientific notation?</span>
Hey there! I'm happy to help!
We start out with 3.
3
Our mom gives us 10.
3+10=13
Our dad gives us 30.
13+30=43
Our aunt and uncle give us 100.
43+100=143
And we have another 7.
143+7=150
Therefore, we have $150 now.
Have a wonderful day! :D
Answer:
4x-12
Step-by-step explanation:
