Solve this system of linear equations. separate
the x- and y-values with a comma.
13x = -21 - 2y
- 15x = 23 + 2y

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Grace is a 70-year old woman who paid the utility bill online for the first time. she called her bank's customer service center to make sure she had done the transaction successfully. but the voice recording repeatedly played a message that all representatives were busy, which irked grace. which factor would make grace not recommend the bank to others? a. absence of technology b. lack of accessibility c. lack of financial products d. poor reputation

Given: df and de are midsegments of abc prove: de=1/2 ac