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
Lynna [10]
3 years ago
11

HELP!!!!!!!!! I’m almost done

Mathematics
1 answer:
balandron [24]3 years ago
8 0

Alright, we're in the home stretch here :) All you need to remember is that i² = -1. Otherwise, it is the same as FOIL


(3-2i)(1+7i)

3-2i+21i-14i² ← Replace the i² with -1, then simplify like numbers

3+19i+14

17+19i or C

You might be interested in
Mr. Mohammed withdraw a sum of money from the bank. He gave 3/8 to his son and 1/4 to his daughter. If he had GHc 600 left, how
Lesechka [4]

Answer:

GHc 1600

Step-by-step explanation:

Step 1: Find the sum of the fractions of money he gave out

Fraction gave out = \frac{3}{8} + \frac{1}{4}

Step 2: Add the fractions together

Lowest common multiply (Lcm) of 8 and 4 = 8

= \frac{3+ 2}{8} \\= \frac{5}{8}

Step 3: Find the fraction left by subtracting fractions gave out from 1.

= 1 -  \frac{5}{8}\\\\= \frac{8 - 5}{8}  \\= \frac{3}{8}

Step 4:

Let the total money he withdraw from the bank = n

\frac{3n}{8} = 600\\3n = 4800\\n = \frac{4800}{3} \\n = GHc 1600

3 0
2 years ago
A rectangular photograph is nine centimeters wide and fourteen centimeters long. The photograph is enlarged by increasing the le
koban [17]

Answer:

Width=13cm

Length=18cm

Step-by-step explanation:

Width of the Initial Photograph=9cm

Length of the Initial Photograph=14cm

If width and length are increased by an equal amount, say x

New Width=9+x

New Length=14+x

Area of the new photo is 108 square centimeters greater than the area of the original photo.

Area of Original Photo=14*9=126cm²

Aeea of the New Photo=126+108=234cm²

Therefore:

(9+x)(14+x)=234

126+9x+14x+x²-234=0

x²+23x-108=0

x²+27x-4x-108=0

x(x+27)-4(x+27)=0

(x+27)(x-4)=0

x+27=0 or x-4=0

x=-27 or x=4

Since x≠-27

x=4cm

The dimensions of the new photo are:

Width=9+x=9+4=13cm

Length=14+x=14+4=18cm

4 0
3 years ago
A new carpet cleaning company claims that they can clean 3 times as many carpets in 1 week as another company. If both companies
inna [77]

Answer:

The number of carpets cleaned by new company per week  is 249

Step-by-step explanation:

Let us assume :

The number of carpets cleaned by old company in 1 week = m

So, the number of carpets cleaned by new company in 1 week

= 3 x ( Number of carpets cleaned by old company)

 = 3 (m) = 3 m

Total carpet cleaned altogether in a week  = 332

So, Total Carpets cleaned by both companies in 1 week

= Number of carpets cleaned by ( Old + New) company in 1 week.

=  m + 3  m =  4 m

⇒  4  m = 332

or, m = 332 / 4 = 83  , or m = 83

Hence number of carpets cleaned by old company per week = m = 83

The number of carpets cleaned by new company per week

= 3 m =  3 x 83= 249

8 0
3 years ago
A study intends to estimate a population mean with an unknown population standard deviation and a sample size of 15. Which of th
GuDViN [60]

Answer:2.624

Step-by-step explanation:

5 0
3 years ago
Please answer quick! I've been stuck on this one a bit, I keep getting the wrong answer. (I'm not the best at math so maybe ya'l
g100num [7]

Answer:

x= 5.6

Step-by-step explanation:

Basically, if you do 7÷5 it would equal 1.4 so you would have to multiply 4x1.4 which would equal 5.6.

In conclusion 4/7 = 5.6/5

8 0
3 years ago
Read 2 more answers
Other questions:
  • What fraction is shown by the point on the number line? Type your answer
    5·2 answers
  • Which statement is true about the ray passing through points B and C?
    5·2 answers
  • What is a possible value for the missing term of the geometric sequence 1250 ___ 50
    14·1 answer
  • Solve<br> 3x + 2y + 5x - y
    8·2 answers
  • Help please with these problems
    12·2 answers
  • Determine the value of x in the diagram below
    12·1 answer
  • Jenae is sewing a quilt for her grandmother. She decides the area of the quilt will be x2 + 18x + 80 square feet. The length of
    12·1 answer
  • Centerville has a population of 18,000. People under the
    15·1 answer
  • Help Me Please Worth 100 Points
    6·2 answers
  • PLEASE HELP!!! URGENT!!!!!!!!!!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!