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
Anni [7]
3 years ago
13

Which of the following equations have complex roots?

Mathematics
1 answer:
valkas [14]3 years ago
8 0

Answer:

B

Step-by-step explanation:

A:

Completing the square:  (x+ 7/2)^2 = -2 + 49/4 = 41/4, in the next step you'll be square rooting a positive number so it'll have real roots.

B:

Completing the square:  (x+3/2)^2 = -9 + 9/4 = -27/4, you'll next be square rooting a negative number, so it'll have complex roots

C:

Completing the square:  (x-5/2)^2 = -1 + 25/4 = 21/4, next you'll square root a positive number, so real roots

D:

Completing the square: (x+7/2)^2 = 2 + 49/4 = 57/4, square root a positive number, so real roots.

You might be interested in
Evaluate expression 8z+3;z=8
Oxana [17]
The answer would be 67
7 0
3 years ago
Read 2 more answers
Someone please help on 43.
Bas_tet [7]

Answer: p=9.7

Step-by-step explanation:

40p+ 10.5p=489.85

50.5p=489.85

9.7=p

6 0
3 years ago
Read 2 more answers
Alegebra liner equations.
luda_lava [24]
1. The answer would be (D). This is because you will plug is the (x) of the ordered pair into the equation(y=-2x), so first off would be (y=-2(-2)). since your multiplying a negative time a negative, you will get your (y) which is 4. Now you do this with the rest. -2(1)=-2 and -2(3)=-6.
2. This would be (A). This answer is simple. First you will take one of the equations (y=-x-1) and plug x into it's place so, y=-3-1, getting your answer(y) as being -4. Now you do the same with the other pair. y=-5-1, getting -6, showing (A) as your answer.
3.The answer will be (A)y is 2 times x. this is because you wou would make out the equation from the answer (y=2x). Now knowing your equation, all thats left is plugging in your (x) factors. so y=2(1), getting your (y) value of 2 and you would do this with the rest of your x factors. 
4. y=5+x
    y=5+(2)= 7
    y=5+(3)= 8
    y=5+(4)= 9
5. (B)y is 3 times x
    y=3(x)
    y=3(3)=9
    y=3(4)=12
    y=3(5)=15
6. (C)y is 6 less than x
    y=6-(x)
    y=6-(8)=2
    y=6-(9)=3
    y=6-(10)=4
5 0
2 years ago
Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal plac
valentinak56 [21]

Answer:

tan(θ) = 0, 0.577, -0.577

Step-by-step explanation:

3tan³(θ) - tan(θ) = 0

tan(θ)(3tan²(θ) - 1) = 0

tan(θ) = 0

tan²(θ) = ⅓ tan(θ) = +/- sqrt(⅓)

tan(θ) = 0, sqrt(⅓), -sqrt(⅓)

tan(θ) = 0, 0.577, -0.577

To find θ values, domain is required

6 0
3 years ago
Write the expression as the sine, cosine, or tangent of an angle.
erma4kov [3.2K]

Answer:

tan56°

Step-by-step explanation:

The Addition identity for tangent ratio is

tan(x + y) = \frac{tanx+tany}{1-tanxtany} , thus

\frac{tan24+tan32}{1-tan24tan32} = tan(24 + 32)° = tan56°

7 0
2 years ago
Other questions:
  • A regular hexagon has an apothem measuring 14 cm and an approximate perimeter of 96 cm.
    12·2 answers
  • 10 times as many as 1 hundred is _____ hundreds or________ thousand.
    7·2 answers
  • Which statement describes how the graph of the given polynomial would change if the term 2x5 is added?
    13·2 answers
  • Evaluate each expression <br> 6p3 <br> If p= -4
    11·2 answers
  • A baby elephant weighs 200 pounds at birth. Seven years later, the elephant's weight is 3,000 pounds.
    6·2 answers
  • Please help! Marking brainliest if correct.
    9·2 answers
  • 9. Waldo and Freddy caught fish one weekend. The dot plots show the lengths of the fish they caught. Length of Waldo's Fish + 16
    15·1 answer
  • albert announces to his mother, he is hungry and asks what is there to eat? she responds, go look in the refrigerator. which fac
    13·1 answer
  • What are the odds of not rolling a three on a standard six-sided die?
    13·2 answers
  • Tracey paid $150 for an item that was originally priced at $510. What percent of the original price did Tracey pay?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!