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DiKsa [7]
3 years ago
10

Solve each equation by finding all roots x^4-16=0

Mathematics
2 answers:
Alexandra [31]3 years ago
4 0
Add both sides by 16
so you'll have x^4 =16
take the 4th root of both sides and you'll get x=  2
SashulF [63]3 years ago
3 0
{ x }^{ 4 }-16=0\\ \\ { x }^{ 4 }=16\\ \\ x=\pm \sqrt [ 4 ]{ 16 } \\ \\ \therefore \quad x=\pm 2
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Which equation represents 4x – 3y = 15 when solved for y
andrey2020 [161]

Answer:

y=4/3x-5

Step-by-step explanation:

4x-3y=15

-4x      -4x

______________

-3y=-4x+15

----    ---  ----       (divide all by -3)

-3     -3   -3

y=4/3x-5

5 0
3 years ago
Use a diagram to solve: Sara ran two-fifths of the race. She needs to run 120 m more to finish the race. What is the length of t
KATRIN_1 [288]
The answer would be 200 meters.
7 0
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For a population with u=100 and a=20, what is the z-score that corresponds to x=90?
max2010maxim [7]
I guess that u = μ & that a=σ. If so:

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3 0
3 years ago
What is the equation of the line with slope of ½ , and which passes through the point
Law Incorporation [45]

Answer:

y = 1/2x - 7

Step-by-step explanation:

slope intercept form:

y = mx + b

y = -5

m(slope) = 1/2

x = 4

y = mx + b

<em>substitute </em>

-5 = 1/2*4 + b

-5 = 2 + b

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6 0
3 years ago
A boat travels for 7 hours. if it travels 4 hours downstream and 3 hours upstream. ten t covers a distance of 116 km. but if it
nadya68 [22]
Speed = Distance / Time
Distance = Speed*Time

For this problem, we should bear in mind that current speed has an impact on the boat speed...

for upstream, the boat goes against the current, and so its speed is

U = V - C

where V is the speed of the boat
C is the current speed

for downstream, it will be:

D = V + C

Convert the problem into mathematical equations:

4D + 3U = 116
3D + 4U = 108

4(V+C) + 3(V-C) = 116
4V + 4C + 3V -3C =116
7V + C = 116

3(V+C) + 4(V-C) = 108
3V + 3C + 4V - 4C = 108
7V - C = 108

Solving the equations:

7V + C = 116
7V - C = 108

14V = 224
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to get C:
7(16) + C = 116
C = 4km/hr

5 0
3 years ago
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