Answer:
Step-by-step explanation:
Find the volume of a sphere 12 yards a crossed
Answer:
18 food booths initial costs are $(3,150 + 7d)
Step-by-step explanation:
You can calculate it using the law of cosines: c^2=a^2+b^2-2*a*b*cos(C)
your triangle is
CD=15=a
CE=?=b
DE=CE+3=b+3=c
and C=90°
-> insert those values, with c substituted with b+3 to remove c
c^2=a^2+b^2-2*a*b*cos(C)
(b+3)^2=15^2+b^2-2*15*b*cos(90)
cos(90)=0->
(b+3)^2=15^2+b^2
b^2+2*3*b+3^2=225+b^2
6b+9=225
6b=216
b=36=CE
DE=CE+3=36+3=39
You want to divide the cost of the books by the total costs.
308/2800 = 0.11
You then need to convert 0.11 to a percent: 0.11 = 11%
Therefore, 11% of her costs last semester were spent on books.
That’s too much!
For this case we have a system of two equations with two unknowns:
We follow the steps below:
We add the equations:
We divide between 9 on both sides of the equation:
We substitute the value of "x" in the first equation and find the value of y:
Thus, the solution of the system is: (3, -1)
Answer:
(3, -1)
