MATHEMATICS MIDDLE SCHOOL

Find the additive inverse of −5 + 7i.

Answers

Answer 1

Answer:

Answer:

5-7i

Step-by-step explanation:

-5+7i+(5-7i)=0 so 5-7i is the additive inverse of -5+i

hope this helps-

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How do i solve 4/9+5/6

Answers

We must find the common denominator.

It's LCM of 9 and 6.

Multiples of 6: 0, 6, 12, 18, 24, ...

Multiples of 9: 0, 9, 18, 27, ...

LCM(6, 9) = 18

18 = 3 · 6

18 = 2 · 9

$(4)/(9)=(4\cdot2)/(9\cdot2)=(8)/(18)\n\n(5)/(6)=(5\cdot3)/(6\cdot3)=(15)/(18)\n\n(4)/(9)+(5)/(6)=(8)/(18)+(15)/(18)=(8+15)/(18)=(23)/(18)=(18+5)/(18)=1(5)/(18)$

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Other method:

$(4)/(9)+(5)/(6)=(4\cdot6)/(9\cdot6)+(5\cdot9)/(6\cdot9)=(24)/(54)+(45)/(54)=(24+45)/(54)=(69)/(54)=(54+15)/(54)\n\n=1(15)/(54)=1(15:3)/(54:3)=1(5)/(18)$

Hello!

Answer: =23/18. *The answer must be have a fractions.

Explanation:

Add the numbers and fractions.

8/18+15/18

When the denominator are equal, and it's going to be combine by the fractions.

8+15/18

15+8=23

=23/18

Hope this helps!

Thanks!

Have a great day!

-Charlie

There are 5 boys in a class of 14 students (a)what is the ratio of girls to boys (b)what is the ratio of all students in the class to girls

Answers

Answer: a. 9:5

b: 14:9

Step-by-step explanation:

if there are 14 people in a class given 5 boys, then there are 9 girls. The values needed are boys (5), girls (9), and total students (14). Ratio Girls : Boys is 9 : 5 and Ratio All Students : Girls is 14 : 9

Answer:

9:5

Step-by-step explanation:

if there are 14 people in a class given 5 boys, then there are 9 girls.

Keyanna saved $75 this summer by babysitting. After school, she makes $10 a week babysitting. a) Write an equation for the amount, A, of money that she will have after w weeks.
b) How much will she have after 5 weeks?
c) How many weeks until she has $255?

Answers

Given:
Savings : $75
Babysitting earnings : $10 a week.

a) A = $75 + $10w

b) A = $75 + $10 * 5 weeks
A = $75 + $50
A = $125

c) A = $75 + $10w
$255 = $75 + $10w
$255 - $75 = $10w
$180 = $10w
$180/$10 = w
18 = w
Keyanna needs to babysit for 18 weeks.

There are 126 seats in a meeting room.There are 9 seats filling up each row. There are 90 people seated, filling up full rows. How many rows are empty? Answer the question with steps or you will not get brainliest.

Answers

The number of rows kept empty will be 4 in the meeting room.

What is Arithmetic progression?

The difference between every two successive terms in a sequence is the same this is known as an arithmetic progression (AP).

The arithmetic progression has wider use in mathematics for example sum of natural numbers.

As per the given,

Number of seats in one row = 9

Total number of seats = 126

Maximum number of possible rows =126/9 = 14 rows

Total number of people seated = 90

Number of rows filled = 90/9 = 10 rows

Empty rows = 14 - 10 = 4 rows.

Hence "In the meeting room, four rows will be left unoccupied".

For more about Arithmetic progression

brainly.com/question/20385181

#SPJ2

Alright. Let us start to solve!

126 seats is the total.

9 seats for each row.

90/9 = 10

10 rows are already occupied.

126/9 = 14

there are 14 rows altogether.

Since 10 are occupied, and there are 14, we subtract.

14-10 = 4

Answer: There are 4 rows empty

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