Answer:
7.48m (3s.f.)
Step-by-step explanation:
Let the missing side be x m.
Applying Pythagoras' Theorem,
x² +5²= 9²
x² +25= 81
x²= 81 -25 <em>(</em><em>-25</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>
x²= 56
x= 7.48 (3 s.f.)
∴ The missing side is 7.48 m (3s.f.)
Answer:
I think it would be C.
Step-by-step explanation:
One is positive Four is negative so is 1+(-4)
Answer:
n= 3/5
Step-by-step explanation:
This can be easily done by cross-multiplying(and also beneficial to get rid of fractions):
(5n+1)(2) = 1(8)
10n +2 = 8
10n = 8-2
10n=6
n = 6/10
Simplify:
n = 3/5
Hope this helps!
6 vertices not sure what the shape is tho sorry
<span>We know that sin^2(x) = 1 - cos^2(x), so
2 - 2 cos^2(x) = 2 + cos(x)
cos(x) + 2 cos^2(x) = 0
One immediate possibility is that cos(x) = 0, in which case x = Pi/2 or
3pi/4. If cos(x) is not zero, then divide both sides by cos(x) to obtain
cos(x) = -1/2
which gives x = 2Pi/3 and x = 4Pi/3.
So your solutions are
Pi/2, 3Pi/4, 2Pi/3, and 4Pi/3
Hope this helps :D</span>
