create equivalent system of equation using the sum of the system and the first equation -5x+4y=8, 4x+y=2 choices -5x+4y=8,9x+5y=10 or -5x+4y=8,-x+5y=10 or -5x+4y=8,9x+5y=2or -5x+4y=8,-x+y=10

Which sentence uses an objective tone? we will plant the best garden of any school in the area. the new campus garden will surely be envied by other schools. a garden would provide numerous benefits to the students. you will probably agree that gardens have many benefits.

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)