Compute the sum to simplify C :
Now, 
is the entry of the matrix in row i and column j, so
Answer:
The distance between the two piers is <u>3 miles.</u>
Step-by-step explanation:
If in Tasha's drawing 2cm represents 0.5 miles between the two piers, and the distance between the two piers in Tasha's drawing is 12cm.
The answer is found by <u>the rule of three:
</u>
2 cm : 0.5 miles
12 cm : X
X = (12 * 0.5) / 2
X = 3 miles.
The distance between the two piers is actually 3 miles.
Answer:
20 is the answer.
Step-by-step explanation:
Substitute 3 in for x and -2 in for y.
4(3) - (-2 to the third power)
12 - -8 = 12 + 8
The answer is 20
Please mark brainliest as that would really help out :3
Answer:
17.2°
Explanations
To find angle A, use the cosine rule.
a^2 = b^2 + c^2 - 2 × a × c cos A
4^2 = 7^2 + 10^2 - 2 × 7 × 10 cos A
16 = 49+ 100 - 140 × cosA
16 = 149 - 140cosA
16- 149 = - 140cosA
-133 = - 140cosA
cosA = 133/140
cosA = 0.95
A = 17.2°
