Answer:
please mark my answer as brainliest:
7/100, 1/19
1/20, 7/80
Step-by-step explanation:
firstly, figure out the total amount of students:
5+7+4+4=20
<em>remember that dependant variables means you have to multiply the values</em>
a)
figure out probability of choosing a green eyed student:
4/20
figure out probability of choosing a brown eyed student:
7/20
multiply values:
4/20 x 7/20 = <u>7/100</u>
b)
probability of choosing a blue eyed student:
5/20 = 1/4
probability of choosing another blue eyed student:
4/19 (bc theres 1 less)
multiply:
1/4 x 4/19= 1/19
PART 2
a)
probability of choosing a hazel eyed student:
4/20
probability of choosing a blue eyed student:
5/20 = 1/4
multiply:
4/20 x 1/4 = 4/80= 1/20
b)
probability of choosing a brown eyed student:
7/20
probability of choosing a blue eyed student:
5/20 = 1/4
multiply:
7/20 x 1/4 = 7/80
Answer:
7/10
Step-by-step explanation:
the '7' in 0.7 is in the tenths place of the decimal. So put 7 over 10 to create the fraction 7/10.
Answer:
1.160
2.84.8
3.1512
4.113.1
Step-by-step explanation:
Answer:
radius = 6.5
<OAC = 67.38 degrees
Step-by-step explanation:
It looks like you are assuming 0 is on AB and in fact defines the circumradius of the circle. Further you are assuming (I think) that ABC is a right angle triangle.
Therefore AB^2 = AC^2 + BC^2
AB^2 = 5^2 + 12^2
AB^2 = 25 + 144
AB^2 = 169
AB = 13
AO is therefore 1/2 of 13 = 6.5.
CO is also 6.5 since all radii are equal.
I don't know if you know this but the only way you can solve this is to use the Cosine Law for distance.
- AC = 5
- OC = 6.5
- OA = 6.5
- <CAO = ??
CO^2 = OA^2 + CA^2 - 2*OA*CA*Cos(<CAO)
6.5^2 = 6.5^2 + 5^2 - 2*5*6.5*Cos(<CAO)
42.25 = 42.25 + 25 - 65*Cos(<CAO)
0 = +25 - 65*Cos(<CAO)
-25 = -65*Cos(<CAO)
0.3846 = Cos(<CAO)
<CAO = cos-1(0.3846)
<CAO = 67.38 degrees.
When x = 8 y = 15
The way to figure this out is to subtract 12 by 5. That’s 7 so there’s a difference of 7 between both of the numbers.
Hope this helped!