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
grandymaker [24]
3 years ago
9

Help me!! solve for d

Mathematics
1 answer:
SpyIntel [72]3 years ago
3 0

Answer:

d =±2sqrt(7) i

Step-by-step explanation:

d^2 = -28

Take the square root of each side

sqrt(d^2) = ±sqrt(-28)

d = ±sqrt(-28)

d = ±sqrt(-1)sqrt(28)

We know that sqrt(-1) = i

d =±i*sqrt(4)sqrt(7)

d =±i 2sqrt(7)

d =±2sqrt(7) i

You might be interested in
The expression i/pt represents the rate of instrest being charged if a loan of p dollars for t years required i dollars in intre
zysi [14]

Answer:

7.3%

Step-by-step explanation:

Given:

<em>Formula for Rate of interest </em>R:

R=\dfrac{i}{Pt}

Where i is the rate of interest.

P dollars is the loan and

t years is the time for which interest is to be paid

P =\$690\\t=3\ years\\i=\$151.11

To find:

R=?

Solution:

Putting the given values in the formula:

R=\dfrac{151.11}{690 \times 3}\\\Rightarrow R=\dfrac{151.11}{2070}\\\Rightarrow R=0.073

Multiply the above value with 100 to find the percentage.

i.e.

R=0.073\times 100 = \bold{7.3\%}

Therefore, the answer is <em>7.3%</em>

8 0
3 years ago
What equations are equal to 3x-12=24
sergiy2304 [10]
According to my examination I have confirmed that I do NOT repeat do NOT know the answer to this question. Good luck!
7 0
3 years ago
A quadratic equation is shown below:
AfilCa [17]

the solutions to a general quadratic equation is

X=-b±√b²-4ac/2a  ,, When ax²+bx+c=0

the discriminant is the expression under the radical b²−4ac

Part A:

discriminant is (-16)² - 4(9)(60) = -1904

there are two complex solutions  

Part B:  

4x² + 8x − 5 = 0

4x² + 10x -2x - 5=0

2x ( 2x + 5) - 1(2 x + 5) =0  

(2x + 5)(2x-1) = 0

      /                     \

    /                          \

2x+5 = 0                 2x-1 =0    

x = -5/2                     x = 1/2

5 0
3 years ago
What is the surface area?<br>18 cm<br>18 cm<br>19 cm​
wariber [46]

Answer:

If it is a rectangular prism (this formula only works with that 3d shape, the answer is 2016 cm²

Step-by-step explanation:

SA=2(hl+hw+lw)

SA=2(18×19+18×18+18×19)

Sa=2(342+324+342)

sa=2(1008)

sa=2016 cm²

3 0
3 years ago
A hairstylist schedules 1/4 hour to trim a customer's hair and 1/6 hour to style the customer's hair. The hairstylist plans to w
inn [45]

Answer:

Step-by-step explanation:

Given:

Hairstylist schedule:

1/4 hour to trim a customer's hair

1/6 hour to style the customer's hair

Work per week:

2 × 1/3 hours per day

= 7/3 hours oer day

5 days a week

Hours in a week = 7/3 × 5

= 35/3 hours per week.

A customer must have hair styled and trimmed.

Total number of hours per customer = 1/4 + 1/6

= 5/12 hours per customer.

Therefore, 28 appointments can be nade each week.

Total number of hours per week = 5/12 × number of customers, n

35/3 = 5/12 n

n = 28 customers per week

4 0
3 years ago
Other questions:
  • A local coffee shop serves 2/9 as many customers as a shop run by a national coffee chain. The shop run by the chain serves 502
    14·2 answers
  • For a=3-5c when c=-0.5, what does a equal?
    13·1 answer
  • Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s?
    15·1 answer
  • Help it’s due by 11:59..........................help!
    6·2 answers
  • Khan academy : Sasha has been saving the money she earns from babysitting for several months. She has a total of $96.75 dollar s
    8·1 answer
  • Which property of multiplication is shown below?
    10·2 answers
  • How do I use multiplication to convert 4 and 5/6 into an improper fraction?
    6·2 answers
  • 6<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%3F%7D%7B%3F%7D%20" id="TexFormula1" title=" \frac{?}{?} " alt=" \frac{?}{?}
    11·1 answer
  • A car travels 120 miles in 2 hours. What was the car's average speed?
    11·2 answers
  • Trigonometry PLEASE HELP
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!