1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andreyy89
3 years ago
12

PLEASE HELP I NEEED HELP ASAP

Mathematics
1 answer:
dolphi86 [110]3 years ago
6 0

Answer:

B

Step-by-step explanation:

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab} and

\sqrt{-1} = i

Given

\sqrt{-80}

= \sqrt{16(5)(-1)}

= \sqrt{16} × \sqrt{5} × \sqrt{-1}

= 4 × \sqrt{5} × i

= 4i\sqrt{5} → B

You might be interested in
Solve 6y2-5y-6 = 0 using the quadratic formula.
sergejj [24]

Answer:

Ay=3 over 2 or y=-2 over 3

Step-by-step explanation:

the quadratic formula: y={-b±√(b²-4ac)}/2a

In the equation 6y²-5y-6= 0, a=6, b=-5, c= -6

Substituting for the values in the formula we get:

{-(-5)±√[(-5²)-4(6)(-6)}/2(6)

{5±√169}12

={5±13}/12

(5+13)/12=3/2 or (5-13)/12= -2/3

4 0
2 years ago
Read 2 more answers
Explain how you might use the properties of multiplication to solve 5 × 120 × 6.232 mentally. Then solve.
zysi [14]

Answer:

Follows are the solution to this question:

Step-by-step explanation:

In this question, we apply the associative property that calculates the given  value, which can be defined as follows:  

Rule:

\bold{\to (A\times B)\times C=  A \times (B\times C)}

Let,

A= 5\\B=120\\C=6.232

put the value in the above rule:

Solve L.H.S part:

\to (5\times 120)\times 6.232\\\\\to (600)\times 6.232\\\\\to 3,739.2

Solve R.H.S part:

\to 5 \times (120 \times 6.232)\\\\\to 5 \times 747.84\\\\\to 3,739.2

So, L.H.S=R.H.S

6 0
2 years ago
How do you get x trigonometry
Svetlanka [38]
Quick vocab:
sin=sine
cos=cosine
tan=tangent
theta=the angle
o=opposite side from angle
h=hypotenuse of triangle
a=adjacent side to angle

Three equations:
sin(theta)= o / h
cos(theta)= a / h
tan(theta)= o / a

Explanation of problem:

sin(x)= o / h
sin(x)= 16cm / 28cm
You'll substitute the 16cm in for o and 28cm for h
This is because 16cm is on the side that's opposite from the angle
28cm is on the hypotenuse of the triangle
One way to find the hypotenuse is look where the 90° is at and it's opposite from that

since you're trying to find the angle you'll have to inverse the sin to get it on the other side of the equal sign
Inverse is doing the opposite of so the inverse of sin is sin^-1

{ \sin}^{ - 1} (\frac{16cm}{28cm})
x = sin^-1 (16cm/28cm)

Answer:

x = 34.84990458°

I don't know how far rounded you'll need it
I hope this helped!
7 0
3 years ago
I’LL MARK AS BRAINLIEST!!! Plz no links
Rufina [12.5K]

Answer:

6 people

Step-by-step explanation:

75% of 8 is 6

multiply 8 by the decimal .75

4 0
3 years ago
Point M is on line segment overline LN . Given MN = 3x , LN = 4x + 9 , and LM = 2x + 7 determine the numerical length of LM .
xxTIMURxx [149]

Answer: 11

Step-by-step explanation:just trust me

7 0
2 years ago
Other questions:
  • I need a answer fast please!
    8·1 answer
  • There 5 panakes in a stack.Elise make 40 pankcankes. How many stacks does Elise make?
    13·1 answer
  • Is 4/3 and 16 /12 proportional
    9·1 answer
  • In 4 month, 104 gallons were used(determine gallons per month)
    7·1 answer
  • Find the perimeter of the rectangle whose vertices are the points with coordinates (0,0), (2,0), (0,5), and (2,5).
    13·1 answer
  • 1-z/z-7 - 8z-3/7-z subtract
    15·1 answer
  • Ok, do this =have 25 points​
    12·1 answer
  • How many integers from 1 through a
    5·1 answer
  • Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll
    10·1 answer
  • Please answer correctly !!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!