Use the given transformation to evaluate the integral.   Rwhere R is the parallelogram bounded by the lines     

src="https://sciemce.com/media/4/ppg__10615191636__f1q26g7.jpg" alt="" style="vertical-align: -4.0px;" />



A. (1 + cos 7)
B. (1 - cos 7)
C. (1 + cos 7)
D. (1 - cos 7)

---

Answer: D

Mathematics

Find the average value of the function f over the given region.f(x, y) = 4x + 8y over the triangle with vertices , , and 

A.
B. 12
C.
D.

Solve the problem.A study in a small town showed that the percent of residents who have college degrees can be modeled by the function  where x is the number of years since 2010. Use numerical or graphical methods to find when the model predicts that the percent will be 70.

A. 2018 B. 2020 C. 2019 D. 2017

Solve.Amy teaches Chinese lessons for $65 per student for a 6-week session. From one group of students, she collects $1690. Find how many students are in the group.

A. 26 students B. 16 students C. 30 students D. 28 students

Solve the problem.A taxpayer's property has a market value of $111,000. The rate of assessment in the area is 30%. The tax rate is $6.45 per $100 of assessed valuation. Find the property tax.

A. $214,785.00 B. $2147.85 C. $715,950.00 D. $7159.50