Answer:
A = 0 +/- nπ radians , where n is an integer.
Step-by-step explanation:
cos 2A = cos^2 A
Use the identity cos 2A = 2 cos^2 A -1 :
2cos^2 A - 1 = cos^2 A
cos^2 A = 1
Cos A = +/-1
When cos A = 1, A = 0 +/- 2nπ radians.
when cos A = -1, A = π +/- nπ radians.
Answer:
11 ounces has = 280.3 milligrams
Step-by-step explanation:
Given that:
79 milligrams of cholesterol in a 3.1 ounce serving of lobster.
So
1 ounce has = 79/3.1 milligrams
1 ounce has = 25.484 milligrams
11 ounces has = 25.484 * 11 milligrams
11 ounces has = 280.323 milligrams
Rounding off to nearest tenth:
11 ounces has = 280.3 milligrams
i hope it will help you!
divide the total cost ($192.00) with the number of children (16):
$192.00 : 16 = $12
the cost is $12 per child.
A.
s=number of strawberry wafers
c=number of chocolate wafers
3s+1c=30
s+c=22
B.
multiply 2nd equation by -1 to do elimination
add to the first equation
3s+1c=30
<u>-s-c=-22 +</u>
2s+0c=8
2s=8
divide by 2
s=4
sub back
s+c=22
4+c=22
c=18
I used elimiation because it seemed right for this one
I can also do subsitution
3s+1c=30
s+c=22
minus s both sides in 2nd equation
c=22-s
sub for c in other equation
3s+22-s=30
2s+22=30
minus 22 both sides
2s=8
divide by 2
s=4
and now
c=22-s
c=22-4
c=18
substiotion because it's easier for some people to see
18 chocolate
4 strawberry
