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leonid [27]
3 years ago
15

Two roots of a 3-degree polynomial equation are 5 and -5. Which of the following cannot be the third root of the equation?

Mathematics
2 answers:
cricket20 [7]3 years ago
7 0

Answer:

5i and -5i

Step-by-step explanation:

Both of these would have to be in the equation for either of them to work, and as the problem already told us that there is only a 3rd root, neither will be our answer.

Have a great day, and feel free to comment with questions!

:)

Pavel [41]3 years ago
6 0

Answer:

5i and -5i

Step-by-step explanation:

Imaginary roots come in pairs, so the third root must be a real number.  Therefore, neither 5i nor -5i can be the third root.

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A sprinting cheetah covered a distance of 518 meters in 18.5 seconds. If the cheetah ran a constant speed, how fast was it runni
artcher [175]

Answer:

Speed of the cheetah would be 28 m/sec

Step-by-step explanation:

Given:

Distance covered = 518 meters

Time taken = 18.5 seconds

To Find:

Speed of cheetah = ?

Solution:

We are given with the distance and time of the cheetah and we have to find the speed of the cheetah which we can find out by the formula i.e.

Distance = speed * time

Putting in the values

518 = speed * 18.5

Dividing both sides by 18.5

it gives us

518 / 18.5 = speed                               ∴ 18.5 / 18.5 = 1  and 1* speed = speed

28 m/sec = speed

Or Speed = 28 m/sec

Speed of the cheetah would be 28 m/sec

8 0
3 years ago
The bill for lunch at a restaurant was $30. The dinner added 20% tip. Which equation relates the tip, t, with the bill, b?
77julia77 [94]
Hi! :)

The answer is A, here's why:

When tipping at a restaurant, first you need to figure out how much you're tipping. You need to move the decimal left 2 places on how much you tip. So for 20%, you get .20

Then to figure out how much to tip for 20%, you would multiply that .20 by how much the bill was and that's your tip. So .20*30=6. Your tip should be 6 dollars, and the formula for that is t=.20<em>b</em>
8 0
3 years ago
Read 2 more answers
Solve the equation and enter the value of x below 2(x+6)=-10
malfutka [58]

Answer:

\huge \boxed{x=-11}

Step-by-step explanation:

First, divide by 2 from both sides of equation.

\displaystyle \frac{2(x+6)}{2}=\frac{-10}{2}

Then, solve.

\displaystyle x+6=-5

Subtract by 6 from both sides of equation.

\displaystyle x+6-6=-5-6

Solve to find the answer.

\displaystyle x=-11, which is our answer.

6 0
3 years ago
Solve the following equation to determine the value of x: 3x + (x + 10) + 5x + (2x + 2) = 56
nika2105 [10]

Answer:

I think x = 4.

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

3x + x +10 + 5x + 2x + 2 =56

(3x + x + 5x + 2x) + (10 + 2) = 56 (Combine Like Terms)

11x + 12 = 56

11x + 12 = 56

Step 2: Subtract 12 from both sides.

11x + 12 − 12 = 56 − 12

11x = 44

Step 3: Divide both sides by 11.

11x/11 = 44/11

x = 4

7 0
3 years ago
Please try and help me with this question I need help
Umnica [9.8K]
B) an=5^n−1
d) an=10^n−1
8 0
3 years ago
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