What is the value of (7 +21)(3 - i)?

Answers

Answer 1
(7+21)=28

28(3-I)=

28•3 =84

28•I=28i

28/84=3,5

3,5=I

Related Questions

Amazon plans to ship 23,660 pencils to our school. Amazon currently only has 35 boxes to ship all of the pencils. If every box carries the same number of pencils, then how many pencils will be shipped in each box?

Answers

Answer:

676

Step-by-step explanation:

Divide the number of pencils by the number of boxes

Find the cost of erecting a 6 m by 4 m rectangular garden shed that is 2 m high if
the metal sheeting costs shs58,500 per square metre.​

Answers

Answer:

2320000

Step-by-step explanation

work out the perimeter first 6+4 times 2= 20

20 time 2m high=40

40 times 58000= 2320000

Solve the given system using elimination.

Answers

Answer:

s = 1

t = -10

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

15s + t = 5

4s = 3t + 34

Step 2: Rewrite

15s + t = 5

Subtract t on both sides:                    15s = -t + 5Multiply both sides by 3:                    45s = -3t + 15

Step 3: Redefine Systems

45s = -3t + 15

4s = 3t + 34

Step 4: Solve for s

Elimination

Combine equations:                    49s = 49Divide 49 on both sides:             s = 1

Step 5: Solve for t

Define equation:                     15s + t = 5Substitute in s:                         15(1) + t = 5Multiply:                                   15 + t = 5Isolate t:                                   t = -10

Answer:

Explanation is below

Step-by-step explanation:

Here ya go

Step 1

15s+t=5,4s=3t+34  Question

Step 2

4s=3t+34  Substitute  -15s+5

4s=3(-15s+5)+34

s=1

Step 3

t=-15s+5  Substitute 1 for s

t=(-15)(1)+5

t=-10

answer

s=1

t=-10

PLS HELP ME 5.7 + (3z + 0.3)

Answers

Answer:

3z + 6

Step-by-step explanation:

5.7 + (3z + 0.3) =

= 5.7 + 3z + 0.3

= 3z + 6

Bob puts a glass of water in the freezer and records the temperature every 15 minutes. The results are displayed in the table below. If this pattern continues, what will be the temperature at 2:15 PM? Explain your answer.

1:00 PM 92 Degrees
1:15 PM 60 Degrees
1:30 PM 44 Degrees
1:45 PM 36 Degrees

Answers

Answer:

30 Degrees

Step-by-step explanation:

As per table we see the difference and pattern of decrease 1/2 times every 15 minutes:

1:00 PM 92 Degrees 1:15 PM 60 Degrees  = -32 Degrees 1:30 PM 44 Degrees  = -16 Degrees 1:45 PM 36 Degrees = -8 Degrees

Expected

2:00 PM 32 Degrees = -4  Degrees 2:15 PM 30 Degrees  = -2 Degrees

Write this fraction in an equation using words: 2/3

Answers

Answer:

two-thirds plus five=five and two-thirds

Step-by-step explanation:

Two divided by three

Complete the steps to solve for x.
-0.51x + 0.21x = 6.3
- 0.51x + 0.21x = 6.3
x = 6.3

Answers

Answer:

Step-by-step explanation:

-0.51x+0.21x=6.3  combine like terms

-0.3x=6.3  divide by -0.3

x= -21

You cell phone bill is $19.95 a month and $0.30 per text message. Your bill for last month was $94.95. How many text messages did you send or receive?

Answers

Answer:

Step-by-step explanation:

94.95-19.95= 74.00

74.00/ 0.30 = about 246 text messages

Answer:

250

Step-by-step explanation:

Let the number of text messages be x.

We have following equation as per given:

19.95 + 0.30x = 94.950.30x = 94.95 - 19.950.30x = 75x = 75/0.30x =250

Answer: 250 text messages

Pleas pleas pleas pleas pleas help me!!

Answers

Answer:  $874.50

Step-by-step explanation:

I = P x R x T

825 x 0.06 x1 = $49.50 interest

825.00 + 49.50 = $874.50 total cost for the phone after a year

Which could be the value of A?

A) - 10
2
C)
3
B) 0
D) 2.0

Answers

Answer:

A

Step-by-step explanation:

PLEASE HELP ME!!!!! NEED HELP ASAP!!!!!

Answers

I think the answer is A

determine the type of triangle ​

Answers

Scalene right triangle-

None of the angles are congruent so it’s scalene, but since a it has a 90 degree angle it is also a right triangle

Which expression is equivalent to (m^2-3m+7)(m-5)^-1

Answers

Answer:

a

Step-by-step explanation:

what 30+30+30+4+60+9+80

Answers

Answer:

243

Step-by-step explanation:

I need help with my homework this is hard pls help thx!
z=m-x solve for x

Answers

Answer:

x = m - z

Step-by-step explanation:

z = m - x       add x to both sides

z + x = m - x + x

z + x = m            subtract z from both sides

z - z + x = m - z

x = m - z

Answer:

-z + m = x

Step-by-step explanation:

z = m-x

subtract the m from both sides

z-m = -x

you can't have a negative x so multiply everything by -1

-1(z-m = -x)

-z + m = x

Please help for 15 points! ​

Answers

Answer:

There's nothing there

Step-by-step explanation:

simplify This expression

Answers

Answer:

9

Step-by-step explanation:

10-2×3+5

10-6+5

4+5

9

Answer:

9

Step-by-step explanation:

[tex]10-2\times 3+5 \\\\Follow\:the\:PEMDAS\:order\:of\:operations\\\\Multiply\:2\times 3\:=6\\\\=10-6+5\\\\Add \:and \:subtract \: :10-6+5\\\\=4+5\\\\=9[/tex]

B. Barbara spends 16 of her time on the phone. How many hours does she have to work in a week so that she spends 5 hours on the phone?​

Answers

Answer: A.

x*(2/5) = 10

Solve for x.

B.

y*(1/16) = 5

Solve for y

C.

t*(2/17) = 5

solve for t

Step-by-step explanation:

Kimoni wants to purchase a pair of shoes that are on sale for 10% off the regular price
of $64.00. Which is the sale price of the shoes?

Answers

64 * 0.10 = 6.4
64 - 6.4 = $57.60

Answer:

the price of the pair of shoes are $57.60

Step-by-step explanation:

So you first need to find out what 10% is in $64 so your going to multiply 0.1 (10% in decimal form is 0.1 ) by 64 to get 10% of the original price.

64 * 0.1 = $6.40

so now we are going to subtract $6.40 from $64 for the sale price:

$64.00 - $6.40 = $57.60

so the sale price is $57.60

There is a leaky faucet in a bathroom, and Joey places a bucket underneath the faucet. After 23 of an hour, 18cup of water has been collected in the bucket. At what rate, in cups per hour, is water leaking from the faucet?

Answers

Answer:3/16

Step-by-step explanation:

You have to divide the fractions and make the answer a reciprocal.

Hope this helps!

Which pair shows equivalent expressions?

A. 2x + 10 = -2(x - 5)
B. -2(x + 5) = 2x -10
C. -2x - 10 = -2(x + 5)
D. -2(x - 5) = -2x - 10

Answers

Answer:

It's C

Step-by-step explanation:

When you multiply - 2 to what you have in the brackets you get - 2x - 10

Hope this helps, have a wonderful day

Will give brainlist if correct! Thanks if you do help!

Answers

Answer:

D is the answer

Step-by-step explanation:

The correct answer is D because when you look at the graph, we can see that we have a reflection over the x axis, so angle F will be congruent to C and angle D is congruent to angle E

help!!! i will mark the right answer brainliest. 7-8 plz

Answers

Answer:

7. (2,1) 8. (8,2)

Step-by-step explanation:

Step: Substitute4z−7foryin5y+3z=11:

5y+3z=11

5(4z−7)+3z=11

23z−35=11(Simplify both sides of the equation)

23z−35+35=11+35(Add 35 to both sides)

23z=46 Divide both sides by 23

x=2

Substitute2forxiny=4z−7:

y=4z−7

y=(4)(2)−7

y=1

Step: Solve2x+4y=24for x:

2x+4y+−4y=24+−4y(Add -4y to both sides)

2x=−4y+24

x=−2y+12

−2y+12forxin−2x+8y=0:

−2x+8y=0

−2(−2y+12)+8y=0

12y−24=0(Simplify both sides of the equation)

12y−24+24=0+24(Add 24 to both sides)

12y=24 Divide both sides by 12

y=2

Substitute2foryinx=−2y+12:

x=−2y+12

x=(−2)(2)+12

x=8

Help mee!!!! What are the next four terms

Answers

Answer:

-3/4, -1, -1 1/4, -1 1/2

Step-by-step explanation:

Answer:

-3/4 then -1 then -1 1/4 and finally -1 1/2

Step-by-step explanation:

Is the slope-intercept form and standard form of the same line equivalent?

Answers

Answer:

Linear equations can take several forms, such as the point-slope formula, the slope-intercept formula, and the standard form of a linear equation. These forms allow mathematicians to describe the exact same line in different ways.

hope this helps

the person on the top is right

please order these from greatest to least = 2.086 2.854 2.81

Answers

Answer:

Answer: 2.854, 2.81, 2.086

2.854, 2.81, 2.086

You have to look from left to right to see which number will be greater in the intended value. Ones then tenths then hundredths so forth.

Clare estimates that her brother is 4 feet tall. When they get measured at the doctor’s office, her brother’s actual height is 4 feet, 2 inches.
1.What was the error, expressed in inches?
2.What was the error, expressed as a percentage of the actual height?​

Answers

Percentage of error by Clare is estimated as 4.1667 %

Height measured by Clare = 4 feet

Height measured by Doctor = 4 feet, 2 inches

Percentage error = ?

Percentage error = Difference/ Actual height *100

Percentage error = (2/ (4*12))*100

Percentage error = 4.1667 %

The accurate height is measured by Doctor, as he have more accurate measurement system.

select Yes or No to indicate whether each of the ordered pairs is most likely a solution to the equation represented by the graph

Answers

Answer:

(-1, 4)

Step-by-step explanation:

From the graph we see that;

At x = 0, y has a value of 1

At x = 2, y has a value of 1

At x = 1, y has a value of 0

At x = -1, y has a value of 4

Looking at the given options, the only ordered pair that corresponds to a correct reading on the graph as earlier observed is; (-1, 4)

Answer:

no

no

yes

Step-by-step explanation:

(see image for question)

Answers

Answer:

Hans has done a mistake in the second step.

The correct answer is:

5x^2+13x-6=0

5x^2+15x-2x-6x=0 - 5. -6=-30 -30=15. -2

5x(1+3x)-2x(1+3x)=0

(5x-2x)(1+3x)=0

5-2x=0 1+3x=0

x=5/2 x=-1/3

35,423 ÷ 15 with a remainder

Answers

Answer:

Brainliest

Step-by-step explanation:

35,423 ÷ 15= 2361 R 8

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