Which statement correctly explains how mari should find a solution to the following system of linear equations using elimination?

2f-5g=-9
-7f+3g=4

multiply the first equation by 7 and the second equation by 2, and then add.
multiply the first equation by 3 and the second equation by 5, and then subtract.
multiply the first equation by –7 and the second equation by 2, and then add.
multiply the first equation by –3 and the second equation by 5, and then add.

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )