Step-by-step explanation:
Let angle 4 = x
Now
60° + 45° + x = 180°
reason : Sum of interior angle of triangle is 180° ...
105° + x = 180°
x = 180° - 105°
x = 75°
Hence , the value of angle 4 is 75°
1. 4n=g
;
{24*4=96
23*4=92
19*4=76
15*4=60}
2. Each question is worth 4 points. For every dependent variable, multiply by 4 to get the independent variable.
Hope this helped☺☺
Answer:
Step-by-step explanation:
Triangle BCD is a right angle triangle.
From the given right angle triangle
BC represents the hypotenuse of the right angle triangle.
Taking 45 degrees as the reference angle,
BC represents the adjacent side of the right angle triangle.
BD represents the opposite side of the right angle triangle.
To determine BC, we would apply trigonometric ratio
Cos θ = adjacent side/hypotenuse side. Therefore,
Cos 45 = BC/2√2
√2/2 = BC/2√2
BC = 2√2 × √2/2
BC = 2
Mara has 19 shells. I hoped this helped! Mark as branliest if possible!
<h2>Answer :</h2>
Katherine's marks = 84,92,84,75,70
Total marks = 84+92+84+75+70 = 405
No. of observations = 5
Mean = Total sum of observations/No. of observations
Mean = 405/5=81
Expected mean = 84
Let expected total marks be = n
84=n/5
84×5=n
<h3>n=420</h3>