X + 7y = 0 2x − 8y = 22
x − y = 3 7x − y = −3
−9 + 5y = −4x −11x = −20 + 9y
y = 4x − 9 y = x − 3
Tell which method you used to solve each system and why you chose that method.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Someone me! if you’re smart you can solve this!