I am pretty sure the answer is C.
Answer:
(18+21+17+x)÷4=20
x=24 students
Step-by-step explanation:
(18+21+17+x)÷4=20
(56+x)÷4=20
56+x=20*4
56+x=80
x=80-56
x=24
Answer:
158.1
Step-by-step explanation:
Distance is the square root of (x1-x2)^2+(y1-y2)^2
square root of (-4-146)^2+(2-52)^2
square root of 150^2+50^2
square root of 22500+2500
square root of 25000
50sqrt10
Rounding is 158.1
Answer:
??
Step-by-step explanation:
(sinx + cosx)^2/((sinx)(cosx)) = 2 + (secx)(cscx)
<span>(sinx + cosx)^2/((sinx)(cosx)) = 2 + 1/(sinxcosx); subtract 1/sinxcosx both sides </span>
<span>(sinx + cosx)^2/((sinx)(cosx)) - 1/(sinxcosx)= 2; multiply through by sinxcosx </span>
<span>(sinx + cosx)^2 -1 = 2(sinxcosx) </span>
<span>sin^2 + 2sinxcosx + cos^2 - 1 = 2(sinxcosx); since sin^x + cos^2x = 1 </span>
<span>1 + 2sinxcosx -1 = 2sinxcosx </span>
<span>2sinxcosx = 2sinxcosx</span>
