Answer:
..................................
Answer:
Sara is correct because when you do it out you get a negative first coefficnt
Step-by-step explanation:
Foil both out and see
Answer:
Blue (the first)
Step-by-step explanation:
Answer:
5. 66%
Step-by-step explanation:
Sales tax = $19.80
Cost of item before sales tax = $330
Cost of item after sales tax = 19.80+19.80 + 19.80+330
= $349.80
Sales tax rate
19.80349.80×100%5.66%\begin{lgathered}\frac{19.80}{349.80} \times 100\% \\ 5.66\%\end{lgathered}
349.80
19.80
×100%
5.66%
So rate of sales tax is 5.66%
The greatest common factor of 21, 35, and 49 is: 7
Since 21 is the lowest number we are solving up to, so no other factors can be given after that.
Factors of 21: 1, 3, 7, 21
Factors of 35: 1, 5, 7
Factors of 49, 1, 7
The common factors between the three numbers are 1 and 7, but we are looking for the greatest common factor, not the common ones. It either has to be 1 or 7, and 7 is obviously the highest, making it the greatest common factor.