Answer:
x = 15
Step-by-step explanation:
-3x+20+7x=80
Combine like terms
4x+20 = 80
Subtract 20 from each side
4x+20 -20 = 80-20
4x = 60
Divide by 4
4x/4 = 60/4
x = 15
f(x)=secx.
f'(x)=sec x tan x.
Use the product rule to find f ' '(x).
F ' '(x)=(secxtanx)tanx+secx(sec2x).
So, f ' '(x)=secxtan2x+sec3x.
Evaluate:f ' '(π4)=sec(π4)tan2(π4)+sec3(π4)=(√2)(1)2+(√2)3=√2+2√2=3√2.
Answer:
huh? I don't understand but if it is 3+1= 4
Step-by-step explanation:
Answer:
x= -1/4 and 8
Step-by-step explanation:
2x^2 - 8=31x -2x^2
Combine like terms and move all terms to one side:
4x^2-31x-8=0
use the quadratic formula.
(I can't type this out, but you just plug in the numbers into the formula which you can look up if you don't know it)
Answer:
11: 416
Step-by-step explanation:
so the area of the rectangle is 20*16 and you add the triangle's area which is 96. 320+96=416. I am pretty sure that is the answer. ( Sorry if my drawing is bad) :D
