Answer:
25 ÷ 5 + 7 - (4 × 3)
First Brackets :
4 x 3
= 12
Now division :
25 ÷ 5
= 5
So now this is our equation :
<em>5</em><em> </em><em>+</em><em> </em><em>7</em><em> </em><em>-12</em><em> </em>
<em>Work</em><em> </em><em>From</em><em> </em><em>left</em><em> </em><em>to</em><em> </em><em>right</em><em>:</em>
5 + 7
= 12
12 - 12
==> 0
Hope it helps :))
Answer:
-35
Step-by-step explanation:
:D
Answer:
Reject H0
Step-by-step explanation:
Z = -2.474873734
survey (positive) 26
n (total) 200
p 0.2
p /point est. 0.13
POPULATION(min) 4000
np >= 5 ? YES 40
n(1-p) >= 5 ? YES 160
Sample is valid
Confidence Level - "P" values
99% 2.58
Confidence Interval - "P" values
(0.0686 , 0.1914 )
Reference=0.2 Reject H0
A regular polygon has about 5 lines of symmetry. The number of lines of symmetry is equivalent to the number of sides.
Using trial and error
x^4+5x^2-36 factors to (x-2)(x+2)(x^2+9)
2x^2+9x-5 factors to (x+5)(2x-1)
so
(x-2)(x+2)(x^2+9)(x+5)(2x-1)=0
set each to zero
x-2=0
x=2
x+2=0
x=-2
x^2+9=0
x^2=-9
x=3√-1
x=3i
x+5=0
x=-5
2x-1=0
2x=1
x=1/2=0.5
roots are
x=-5-2,0.5,2, and the imaginary root 3i