Mathematics High School

Which expression is equivalent to 4+5i•(2-7i)?

Answers

Answer 1

Answer:

(4 + 5i)(2 - 7i) = 8 - 28i + 10i + 35

= 43 - 18i

4 + 5i(2 - 7i) = 4 + 10i + 35

= 39 + 10i

Related Questions

1,682 inches rounded to the narest tenth is 1.6 inches? true or falce

Answers

Answer:

False

Step-by-step explanation:

False because that’s just what it is

If a class of 30 students have to split the boys and girls in hafe and 10% are girls, how meany girls are in the class

Answers

Answer:

10 girls

Step-by-step explanation:

how do you use scientific notation to estimate the hours in a year

Answers

Answer:

8.760 x 10^3

Step-by-step explanation:

There are 8760 hours in 1 year. So, you can convert this to scientific notation by moving the decimal from 8760 three times to the left: 8760. → 8.760 And since it was moved three times, put an exponent of 3 to the 10: 10^3 So, you get 8.760 x 10^3 hours in a year.

Hope this helps! :)

9
A beach ball has a diameter of 28 inches. Which expression uses the formula for the volume
of a sphere correctly?
(1 Point)
O 3/47 (14)
4/3(78)
O 4/37 (28)
4/377 (14)

Answers

Answer:

a ball strecker

Step-by-step explanation:

Each of the 6 people in mandy's family orders 2 tacos. Each taco cost 3$. What is the total cost of the tacos?

Answers

Answer:

Step-by-step explanation:

6 x 2= 12

12 x 3= 36

Match each inequality with its solutions set

Answers

Answer:

1. will be 2×1+1<_3

2. with 1+3×-2>_5

3. with 5--2×3>_11

4.5×2+7>_17

PLSSSS HELP ME I WILL GIVE BRAINLIEST, A HEART, AND 5 STARS PLSSS HELP ME THIS IS DUE BY THE END OF TODAY

Answers

Answer:

who wanna talk im bored

Answer:

Step-by-step explanation:

why sad? be happy :v

Answers

Answer:

Because two of my uncles got shot and my moms friend committed suicuide. This all happened this year. That’s why I’m sad.

Step-by-step explanation:

find the slope of the line y=-3/8x-7/6

Answers

Answer:

The slope is -3/8

Step-by-step explanation:

Y= mx+b

m or mx is the slope while b is the y intercept

-3/8 hope it helps :)

a bag contains 10 red marbles, the ratio of red marbles to blue marbles is 5 to 1 find the numbers of blue marbles in the bag

Answers

Answer:

The Answer is 2 blue marbles.

Step-by-step explanation:

The numbers of blue marbles in the bag will be 2.

What is proportion ?

A proportion is an equation based on the equality of two ratios.

Here it is given that :

a bag contains = 10 red marbles

the ratio of red marbles to blue marbles is = 5:1

That is :

5 ratio of marbles is equals to = 10 marbles

now,

1 ratio of marbles is equals to = 2 marbles

Therefore, the numbers of blue marbles in the bag will be 2.

Answers

Answer:

x=3

Step-by-step explanation:

3x+4=2x+10

-3 -3

4= -1x+10

-10 -10

-6= -1x

divide by -1

x=6

Thats how you do it

Answer:

x=6

Step-by-step explanation:

first you have to subtract 4 from both sides

3x=2x+10-4

then simplify 2x+10-4 to 2x+6 so you will get

3x=2x+6

-2 -2

(^^you subtract 2x from both sides )

then you get your answer which is x=6

In parallelogram PQRS if m

Answers

Answer:

m∠RSP = 130°

Step-by-step explanation:

In parallelogram,opposite angles are equal.

m∠RSP = m∠PQR

m∠RSP = 130°

Answer:

∠RSP=130

Step-by-step explanation:

It is given that ∠PQR = 130°

∴∠RSP = 130° (vertically opposite angles are equal in a parallelogram)

Can you please help me with this? the question is What is Andrew's mistake? and find the correct answer?

Answers

Answer:

there is no -1 it must be one so it is now 3/4 x 4/3=12/2=1

Step-by-step explanation:

When you divide by a fraction, you must take its reciprocal and multiply.
Andrew did not do that,

So, (-3/4) / (4/3) becomes (-3/4) x (3/4)
The answer is -9/16.

What is the answer.”what is the slope and the y-intercept of the line on the graph below.

Answers

Answer: A: Slope = -4, y-intercept 1

Step-by-step explanation:

To find slope, do rise over run. The y-intercept is where the line crosses the y-axis.

I WILL GIVE BRAINLIEST THIS IS EASY PLS HELP ASAP

Match each term with its definition.

Perpendicular lines?
Angle?
Line segment?
Parallel lines?
Circles?

Answers

Ah bg de cf

Step-by-step explanation:

i think thats how you do it becuse i did that

For A the answer is 4
For B the answer is 3
For C the answer is 5
For D the answer is 1
For E the answer is 2

Suppose that the water level of a river is 34 feet and that it is receding at a rate of 0.5 foot per day. Write an equation for the water level, L, after d days.

Answers

Answer:

L = -0.5x + 34

Step-by-step explanation:

When finding m in the formula y = mx + b. Find a word that means multiplication, in this case 0.5 feet per day.

In any triangle with 105 angle, is the. Longest side always the opposite side

Answers

Answer:

yes

Step-by-step explanation:

The parabola with the vertex at (5,5) and a focus (7,5) would open

Answers

Answer:

Up. The focus is above the vertex meaning the parabola will open up. If the focus was below the parabola then it would open down.

Step-by-step explanation:

What's the value of 6.7×0.54

Answers

Answer:

What's the value of 6.7×0.54

3.618

Step-by-step explanation:

Answer:

3.618

Step-by-step explanation:

3.618

Help please !!!! I’ll give u brainliest

Answers

Answer:

they all have 3 points seeeee

Find the length of BC.
A)8
B)12
C)16
D)18

Answers

Answer:

i think its A (edit: im gonna take that back because i was looking at the wrong side, logically it is 12)

Step-by-step explanation:

Answer:

B. 12

Step-by-step explanation:

logically speaking is 12

LOOK AT THE PICTURE

Please help I’m on a test will mark brainliest!

Answers

Answer:

2/7

Step-by-step explanation:

You have to flip the fraction to check, you see what times 3 gets you six... 2!

then what times one gets you 7.. 7! and that how you get 3/7

(4,6), (73),(4,2),(-3.3),(0, 8)
Is this relationship a function?

Answers

No because 4 is repeating ...(4,6) and (4,2)

2z-6=20..............

Answers

Answer:

[tex]\bf\pink{13}[/tex]

Step-by-step explanation:

Given :-[tex]\sf\blue{2z - 6 = 20}[/tex]

To Find :-Finding / solving to get the 'z' value

Solution :-

[tex]\Rightarrow \: \:\sf\purple{ 2z - 6 = 20}[/tex]

Move the constant to right hand side and change its sign

[tex]\Rightarrow \: \:\sf\green{ 2z = 20 + 6}[/tex]

Add the numbers

[tex]\Rightarrow \: \:\sf\purple{ 2z = 26}[/tex]

Calculate both side of equation by 2

[tex]\Rightarrow \: \:\sf\green{ 2z \div 2 = 20 \div 2}[/tex]

Any expression divided by itself equals to 1

[tex]\Rightarrow \: \:\sf\purple{z = 26 \div 2}[/tex]

Calculate the quotient

[tex]\Rightarrow \: \:\sf\pink{z =13}[/tex]

[tex]\bf\red{Hope \: it \: helps}[/tex]

Round 545 to the nearest hundred

Answers

Answer:

500

Step-by-step explanation:

Answer:

500

When rounding to the nearest hundred, like we did with 545 we use these rules

first you would have to round the number up to the nearest hundred if the last two digits in the number are 50 or above.

then you would have to round the number down to the nearest hundred if the last two digits in the number are 49 or below.

lastly you would have to see if the last two digits are 00, then we do not have to do any rounding, because it is already to the hundred.

HURRY WILL MARK YOU BRAINLIEST RIGHT ANSWER ONLY

Answers

Answer:

Step-by-step explanation:

set the two equations equal to each other then solve for n

6n + 3 = 4n + 11

2n = 8

n = 4

plug n in for both equations

6(4) + 3

24 + 3 = 27

4(4) + 11

16 + 11 = 27

27 + 27 = 54

the distance is 54

how to solve (8+8) + (5x3) Please I need help

Answers

Answer:

(8+8)=16 + (5x3)=15

Step-by-step explanation:

so 16+15=31 all you have to do is parenthesis first then do whatever is in the middle last

solve the system of linear equations by graphing x=3 y=-1/2

Answers

Answer:

x=5 hope this helps

Step-by-step explanation:

Mrs. Eng bought 4 packs of glue sticks. Each pack has 5 glue sticks.

Her class uses 2 of the glue sticks for a project.

Answers

Answer:

18 glue sticks are left

Step-by-step explanation:

Full Question:

Mrs. Eng bought 4 packs of glue sticks. Each pack has 5 glue sticks. Her class uses 2 of the glue sticks for a project. How many glue sticks are left?

Calculations:

4 x 5 = 2020 - 2 = 18

Answer: There are 18 gluesticks left.

Explanation: 4 times 5 equals 20, and taking away 2 would equal 18.

I don't understand this at all. Please help.

- A confused eighth grader.

Answers

Answer:

Step-by-step explanation:

All the other ones are functions because their relations all start with different numbers except T, where it has 3 two times.

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