-7 because the square root of 49 is 7 and -7
I think its 2 I'm not 100% though
Answer:
She will need 3 more of every ingrediant.
Step-by-step explanation:
7x3=21 so 3 more of everything
Expectation is linear in the sense that
![E[2X+3Y]=E[2X]+E[3Y]=2E[X]+3E[Y]](https://tex.z-dn.net/?f=E%5B2X%2B3Y%5D%3DE%5B2X%5D%2BE%5B3Y%5D%3D2E%5BX%5D%2B3E%5BY%5D)
so that
![E[2X+3Y]=2\cdot6+3\cdots9=12+27=\boxed{39}](https://tex.z-dn.net/?f=E%5B2X%2B3Y%5D%3D2%5Ccdot6%2B3%5Ccdots9%3D12%2B27%3D%5Cboxed%7B39%7D)
Answer:
B
Step-by-step explanation:
1/5 as a a decimal would be 0.20 because if you multiply 0.20 by 5 you get 1