9514 1404 393
Answer:
-1/3
Step-by-step explanation:
∛(-1/27) = ∛((-1/3)³) = -1/3
The solution to the given equation is 3±3√3/2
<h3>Solving quadratic equation</h3>
Given the quadratic equation below
2x^2−6x−9=0
Solve using the general formula to have:
a = 2
b = -6
c = -9
Substitute
x = -b±√b²-4ac/2a
x = -(-6)±√(-6)²-4(2)(-9)/2(2)
x = 6±√36+72/4
x = 6±√108/4
x = 6±6√3/4
x = 3±3√3/2
Hence the solution to the given equation is 3±3√3/2
Learn more on quadratic equation here: brainly.com/question/1214333
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Answer:
is it 23.80???????? i think.
Answer:
B. 73.19 mi/hr
Step-by-step explanation:
First we need to define the angles from a common reference. Robin's watercraft is moving 75° west of south, which is the same as 15° south of west. The river is flowing at 75° south of west.
The watercraft velocity relative to the water is:
wx = 70 cos 15° ≈ 67.615
wy = 70 sin 15° ≈ 18.117
The river's velocity is:
rx = 6 cos 75° ≈ 1.553
ry = 6 sin 75° ≈ 5.796
Robin's net velocity is:
vx = wx + rx ≈ 69.168
vy = wy + ry ≈ 23.913
The speed (magnitude of velocity) is:
v = √(vx² + vy²)
v ≈ √(69.168² + 23.913²)
v ≈ 73.19
Answer:
Discount:
$6.30
Final Price:
$35.70
Step-by-step explanation:
Discount = Original Price x Discount %/100
Discount = 42 × 15/100
Discount = 42 x 0.15
You save = $6.30