$x-number\ of\ stools\\y-number\ of\ chairs\\\\ \left \{ {{y+x=16} \atop {3x+4y=55}} \right. \\\\From\ first\ equation:\\\\y=16-x\\\\Substract\ to\ second\ equation:\\\\3x+4(16-x)=55\\3x+64-4x=55\\3x-4x=55-64\\-x=-9\\x=9\\\\y=16-9=7\\\\ \left \{ {{y=7} \atop {x=9}} \right.$

7 0

3 years ago

Can someone please explain to me how to find the interquartile range of something?

Alika [10]

I’ll do an example you have the numbers 1,5,7,2,9 you can tell the median is 7 right? So go from the very left and the median (7) and do the same thing you do to find median. (Id recommend crossing the numbers off as you go if that makes sense! :)

3 0

3 years ago

your test scores in one class are 76 and 84 what possible scores can you earn on your next test to have a test average between 8

Orlov [11]

you have to get a 80 i think

6 0

4 years ago

Annalise invested $3,300 in an account paying an interest rate of 2.8% compounded monthly. Assuming

Artist 52 [7]

Answer:

$4,881.56

Step-by-step explanation:

The future value formula is ...

FV = P(1 +r/n)^(nt)

where principal P is invested at annual rate r compounded n times per year for t years.

You have P=3300, n=12, r=0.028, t=14, so the future value is ...

FV = $3300(1 +0.028/12)^(12·14) = $4881.56

There would be $4881.56 in the account after 14 years.

4 0

3 years ago