MATHEMATICS HIGH SCHOOL

Which property of addition is shown in the equation below?
a+bi+0+0i = a+bi

Answers

Answer 1
Answer: This is the identity property.  It means that any number added by zero would be the same number.  In the second expression the zeroes were taken away.

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A share of stock in the bree medical supply company is quoted at 35 1/4,suppose you hold 20 shares of that stock which you bought at 31 1/2 if you sold that stock at 35 1/2,which of the following would be true?A. you suffered a loss of $75.00
B. you made a profit of $705.00
C. you made a profit of $75.00
D. you suffered a loss of $630.00

Answers

Hi there, we know the total number of stocks bough is 20, the rate was 31 1/2=63/2, 20*63/2=10*63=630 dollars, the rate they were sold is 35 1/4=141/4 dollars, 5*141=705 dollars, the amount of profit is 20 stocks. So, 705-630=75 dollars. So, the answer is C. You made a profit of $75.00

the answer will be c

F(x)=4x^2+7x+18 find f (-9)

Answers

Answer: f(-9)= 243

Step-by-step explanation:

f(x) = 4x²+7x -18

f(-9) = 4(-9)²+7(-9)-18

= 4(81) -63-18

= 324- 81

= 243

PLEASE HELP ME WITH THESE QUESTIONS

Answers

Answer: 8

Step-by-step explanation:

log₃ (x² - 32) = log₃ (4x)   restrictions: x² - 32 > 0 and 4x > 0  ⇒ x > 4√2

x² - 32 = 4x

x² - 4x - 32 = 0

(x - 8)(x + 4) = 0

x - 8 = 0     or     x + 4 = 0

    x = 8     or            x = -4  

                                -4 does not meet the restriction so not valid

********************************************************************************************

Answer: y = 7x - 6

Step-by-step explanation:

                    7x  -6                    

x² + 0x + 4  ) 7x³ - 6x² +  0x  + 7

                   -7x³ + 0x² - 28x

                           -6x²  - 28x +  7

                            6x²  + 0x  + 24

                                    -28x + 31

********************************************************************************************

Answer:  x = (6)/(5)

Step-by-step explanation:

ln 3 + ln x = ln 6 + ln (3x - 3)     restrictions: x > 0 and 3x - 3 > 0  ⇒  x > 1

ln (3 * x) = ln (6*(3x - 3))    

ln (3x) = ln (18x - 18)

 3x = 18x - 18

-18x -18x      

-15x =      -18

(-15x)/(-15) = (-18)/(-15)

x = (6)/(5)

     (6)/(5) > 1 so answer is valid

********************************************************************************************

Answer:  -5.9761

Step-by-step explanation:

log ₁₎₂ 63

= (log (63))/(log((1)/(2)))

= (1.7993)/(-0.3010)

= -5.9761

                     


Which of the following represents the measures of all angles coterminal with a 418° angle?A.360 + 58n, for any whole number n
B.58 + 360n, for any integer n
C.58 + 360n, for any whole number n
D.360 + 58n, for any integer n

Answers

The right answer for the question that is being asked and shown above is that: "C.58 + 360n, for any whole number n." the statement that represents the measures of all angles coterminal with a 418° angle is that C.58 + 360n, for any whole number n

Answer:

B.58 + 360n, for any integer n

Step-by-step explanation:

Compute the least-squares regression line for predicting y from x given the following summary statistics. Round the slope and y-intercept to at least four decimal places. x =8.2 sx =2.2 sy = 1.8 r = 0.60 y = 1300

Answers

Answer:  pedro alvares cabral descobriu o brazil, cristóvao colombo a america

Step-by-step explanation:

There are 600 people on a cruise ship.The over 30s and the 30 and unders are in the ratio 4:1.
30% of the over 30s are female.
Work out how many of the over 30s are male.
Submit Answer
males over 30

Answers

Step-by-step explanation:

600 people is the total number of people.

with a given ratio of 4:1 we know that this total number of people is basically split into 5 (4 + 1) equal units.

each of the 5 units is therefore

600 / 5 = 120 people.

the "over 30s" are 4 of these units = 4 × 120 = 480 people.

the "30 and under" are 1 unit = 120 people.

30% of these 480 "over 30" people are female.

that leaves under normal circumstances 100 - 30 = 70% of these 480 "over 30" people to be male.

100% = 480

1% = 100%/100 = 480/100 = 4.8

70% = 1% × 70 = 4.8×70 = 48×7 = 336 people.

there are 336 males over 30 on that ship.

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