16² = 18² + 19² - 2(18)(19)cos(z)
256 = 324 + 361 - (684)cos(z)
256 = 685 - (684)cos(z)
-429 = -684cos(z)
cos(z) = -429/-684
z = cos⁻¹ (0.627)
z = cos⁻¹ (cos 51) [ Cos 51 = 0.627 ]
z = 51
In short, Your Answer would be: 51
Hope this helps!
Answer:
16 miles
Step-by-step explanation:
<u>Step 1: Make an expression</u>
40% of what distance is 6.4 miles
x * (0.4) = 6.4
0.4x = 6.4
<u>Step 2: Divide both sides by 0.4</u>
0.4x / 0.4 = 6.4 / 0.4
x = 16
Answer: 16 miles
Answer:
The answer is A.
You are dividing by 8, not 10.
Answer:
i think you have to add all the numbers then divide
Step-by-step explanation:
<span>Question 3
Solve for d.
13d + 4 = 43
13d = 39
d = 3
answer
A. 3
</span><span>Question 4
Solve for r.
4r - 6 = 30
4r = 36
r = 9
answer
D. 9
</span>
<span>Question 5
Solve for u.
126 = 6u
u = 126/6
u = 21
answer
B. 21
</span>
