Answer:
53
Step-by-step explanation:
*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^
(2 + 7i)(2 - 7i)
(2 * 2) + (2 * -7i) + (7i * 2) + (7i * -7i)
4 + -14i + 14i + [tex]-49i^{2}[/tex]
4 + [tex]-49i^{2}[/tex] ([tex]i^{2}[/tex] = -1)
4 + (-49 * -1)
4 + 49
53.
53 is the result.
*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^
#teamtrees #WAP (Water And Plant)
The product of (2 + 7i) (2 - 7i) in the form of a + bi is 53 + 0i.
What is an imaginary number?An imaginary number is denoted by i.
The value of i is √-1.
i² = √-1² = -1
We have,
(2 + 7i) (2 - 7i)
We need to write in the form of a + bi.
a + bi
a = real number
b = imaginary part
(2 + 7i) (2 - 7i)
Remove the brackets.
= 2 x (2 - 7i) + 7i x (2 - 7i)
= 4 - 14i + 14i - 49i²
= 4 - 14i + 14i - 49 x -1
= 4 - 14i + 14i + 49
= 4 + 49
= 53
We have only the real part.
So,
The product of (2 + 7i) (2 - 7i) is 53 + 0i.
Thus,
The product of (2 + 7i) (2 - 7i) in the form of a + bi is 53 + 0i.
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does 12/15 and 8\10 have the same value
Answer:
as 12 and 15 can be divided by 3, I'll simplify it to 4/5 and 8 and 10 can be divided by 2 and it'll be 4/5 so they have the same value, see that by simplifying it
Answer:
yes
Step-by-step explanation:
12 divided by 15 equals 0.8
8 divided by 10 equals 0.8
Sorry my brain is fried...
Help me?
its 1:12 am please help me.... please answer all 4 please
Answer:
1:D,2
2:B:She found that -3(9) is positive
3:D:Evaluated -2^2 as -4
4:Confused, is there supposed to be supplemental info?
Step-by-step explanation:
Answer:
hey.. hi.. emme.. is this morning??? if it is GOOD MORNING ☺️
Please hlep me l would appreciate it so much l mom going to give me whopping please hlep me am scared
Answer:
I think it's the first one
Step-by-step explanation:
You can deliver 261
newspapers in 3 hours. How
many newspapers can you
deliver in 8 hours?
Answer:
261÷3=87
87×8=696
Step-by-step explanation:
Answer:
696 in 8 hours
Step-by-step explanation:
You would start by dividing 261 by three to see how many you can deliver in just one hour, which would be 87 newspapers. Then you would times your solution by 8, which is the hours, and you would get 696 newspapers. :)
Help me with math please
Answer:
B. 1/6
Step-by-step explanation:
Barton building supplies sword 44 tons of gravel on Saturday and 80 tons of gravel on Sunday. Which amount is closest to the percent increase of gravel from Saturday to Sunday?
Answer:
I think its 128
Step-by-step explanation:
can you find the slope from (4,5) (9,11)
(please asap)
Answer:
Step-by-step explanation:
The slope of (4,5)(9,11) is 6/5
Answer:
5/6 or 1 1/5 and pls read explanation
Step-by-step explanation:
ok so the diff between (x,y) and (x,y) is here:
the diff between x and x (4 and 9) is +5. the diff between y and y (5 and 11) is +6. you take the reciprocal of 5/6 and that is 6/5 or 1 1/5
if y(x)=4x what is x when y(x)=4?
Answer:
1
Step-by-step explanation:
y(x)=4x
y(x)=4
<=>4x=4
<=>x=1
what is the scale factor from figure a to figure b?
Answer:
4
Step-by-step explanation:
Top side: 10x _ = 40
Left side: 18x _ = 40
Right side: 11x _ =44
All the blanks can be answered with 4. Therefore, your answer is 4.
Hope this helps!
-AxekickNebulite
solve for X 5x(x+3)=x(5x-3)+36
Answer:
x=2
Step-by-step explanation:
5x(x+3)=x(5x-3)+36
5x^2+15x=5x^2-3x+36
-18x+36=0
36=18x
x=2
For a scale to pass inspection, the scale's reading can vary by at most
0.1% from the actual mass of an object on the scale. A test mass has
an exact mass of 250.00 grams. In what range must the scale's reading
be for the scale to pass inspection?
Answer:
I think its 249.99 to 250.01
Step-by-step explanation:
The range of the variation for the scale will be 249.75 grams to 250.25 grams.
What is the percentage?The percentage is defined as representing any number with respect to 100. It is denoted by the sign %. The percentage stands for "out of 100." Imagine any measurement or object being divided into 100 equal bits.
Given that for a scale to pass inspection, the scale's reading can vary by at most 0.1% from the actual mass of an object on the scale. A test mass has an exact mass of 250.00 grams.
The variation of the mass will be calculated as:-
Variation = 250 x 0.1% = ( 250 x 0.1 ) / 100 = 0.25
Higher variation = 250 + 0.25 = 250.25 grams
Lower variation = 250 - 0.25 = 249.75 grams
Therefore, the range of the variation for the scale will be 249.75 grams to 250.25 grams.
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i need help please can someone help
Answer:
1000, 0, 0, 1.
Step-by-step explanation:
MARK ME BRAINLIEST.
Anyone know this problem
Answer:
38 degrees
Step-by-step explanation:
Alternate Exterior Angles Theorem
solve for the proportion (type integer or simplified fraction)
Answer:
b = [tex]\frac{7}{5}[/tex] = 1.4
Step-by-step explanation:
[tex]\frac{2b - 3 }{5}[/tex] = [tex]\frac{b - 2}{15}[/tex]
15(2b - 3) = 5(b - 2)
30b - 45 = 5b - 10
25b = 35
5b = 7
b = [tex]\frac{7}{5}[/tex] = 1.4
Check the answer:
[tex]\frac{2(1.4)-3}{5}[/tex] = [tex]\frac{1.4-2}{15}[/tex]
- [tex]\frac{0.2}{5}[/tex] = - [tex]\frac{0.6}{15}[/tex]
- 0.04 = - 0.04
Please help me what is the increasing interval more than one answer
Answer: First and second
Step-by-step explanation: I took the test and aced it so i hope this helped!
what’s the percent decrease from 90 to 70 in sales
Answer:
22%
Step-by-step explanation:
So First we subtract 90 and 70 = 20
Then we divide 20 by 90 = which gives us approximately 0.22 then we turn that into a percent by moving the decimal point 2x to the right.
So In conclusion, the percent decrease is 22%
Remember the formula is:
amount of change ÷ by the original amount
Noah and Diego left the amusement park’s ticket booth at the same time. Each moved at a constant speed toward his favorite ride. After 8 seconds, Noah was 17 meters from the ticket booth, and Diego was 43 meters away from the ticket booth.
WILL GIVE BRAINEST IF YOU TELL ME how can you tell Diego’s is the blue line and Noah’s is the black?
Answer:
because when Noah was 17 Diego was 43 so his is higher so his would be more upstraight than Noah's
PLEASE HELP THE INFO IS IN THE PICTURE
Answer:
(g-h)(x) = -x^3 - 4x - 2, so the answer is D.
Step-by-step explanation:
(g - h) = -x^3 - 2 - 4x
(g-h)(x) = -x^3 - 4x - 2
A meat distributor paid $2.75 per pound for hamburger and $4.50 per pound for ground sirloin. How many pounds of each did he use to make 75 pounds of meat mixture that will cost $3.24 per pound?
Answer:
The number of pounds of hamburger meat = x = 54 pounds.
The number of pounds of ground sirloin = y = 21 pounds
Step-by-step explanation:
Let the number of pounds of hamburger meat = x
the number of pounds of ground sirloin = y
How many pounds of each did he use to make 75 pounds of meat mixture that will cost $3.24 per pound?
x + y = 75...... Equation 1
x = 75 - y
A meat distributor paid $2.75 per pound for hamburger and $4.50 per pound for ground sirloin.
$2.75 × x + $4.50 × y = 75 × $3.24
2.75x + 4.50y = 243
We substitute 75 - y for x
Hence,
2.75(75 - y) + 4.5y = 243
206.25 - 2.75y + 4.5 y = 243
Collect like terms
- 2.75y + 4.5 y = 243 - 206.25
1.75y = 36.75
y = 36.75/1.75
y = 21 pounds
Note
x = 75 - y
x = 75 - 21
x = 54 pounds
Therefore:
The number of pounds of hamburger meat = x = 54 pounds.
The number of pounds of ground sirloin = y = 21 pounds
The Key Club is having a fundraising dinner for charity. The venue that holds a maximum of 500 people will
cost $1000 and it costs $20 per person for the food. The two charity representatives get to attend for free.
Write an inequality and then determine how many people must come to keep costs at most $25 per person.
Answer:
[tex]\dfrac{\$1000+\$20x}{x} \leq \$25[/tex]
Minimum 200 people other than the 2 charity representatives.
Step-by-step explanation:
Given that:
The venue can hold a maximum of 500 people.
Cost of venue = $1000
Per person cost for food = $20
Two charity representatives get to attend the dinner for free.
To find:
The inequality and to determine how many people must come to keep costs at most $25.
Solution:
Let the number of people attending the dinner = [tex]x[/tex]
Cost of food for [tex]x[/tex] people = [tex]\$20x[/tex]
Total cost = $1000 + [tex]\$20x[/tex]
Cost per person = Total cost divided by Number of people attending the dinner.
As per question statement:
[tex]\dfrac{\$1000+\$20x}{x} \leq \$25\\\Rightarrow 1000+20x\leq25x\\\Rightarrow 1000 \leq 5x\\\Rightarrow x\geq 200[/tex]
Therefore, the answer is:
Minimum 200 people other than the 2 charity representatives should attend the dinner.
(
1
×
10
6
)
−
(
9
×102)
Answer:
-812
Step-by-step explanation:
(1×106)-(9×102)
106-918
-812
A number added to 12 and then subtracted by 18 equals 26. what is the number?
Answer:
it would be 32. you would take your 26 and add 18 then subtract the 12.
Step-by-step explanation:
hope this helps
Answer:
32
Step-by-step explanation:
x+12-18=26
Subtract the numbers 12 and 18
x-6=26
Add 6 to both sides of the equation
x-6+6=26+6
Simplify- Add the numbers thus getting x=32
Find the perimeter of the given figure.
16
16
Plz HURRY
Answer:
44
Step-by-step explanation:
I think I might be wrong
Answer:
perimeter is 44
Step-by-step explanation:
Kaniyah is making ribbons do school spirit day. Her roll of ribbon is 32 ft. long. For each individual ribbon, she needs 0.64 ft. How many ribbons can she make from her roll?
Answer 50 is the answer have a good day
Answer:
50 ribbons
Step-by-step explanation:
To find how many ribbons she can make, divide 32 by 0.64:
32/0.64
= 50
So, she can make 50 ribbons from her roll
Need help please due pretty soon
Answer:
Im going to have to say 8
Step-by-step explanation:
I hope this helps you !
Answer:
B
Step-by-step explanation:
Please help with the question below in the picture
Answer:
10.5 cm or 1.5 cmStep-by-step explanation:
Case 1
O in between A and B
OA = 12 cm, OB = 9 cmDistance between midpoints:
12/2 + 9/2 = 10.5 cmCase 2
B in between O and A
OA = 12 cm, OB = 9 cmDistance between midpoints:
12/2 - 9/2 = 1.5 cmRefer to the table and exercise 11 suppose in the sixth grade 3/4 of the students want a career in either teaching or STEM how many six grade students did not choose a career in teaching or stem
Answer: where is the table?
Step-by-step explanation:
Answer:
1/4
Step-by-step explanation:
What are the zeros of this function
What’s the answer because I don’t know it!??
Answer: I think it is 1- x = 2, 2 times 2 times 2 times 2 = 16
Step-by-step explanation:
Answer
2^5=32
8²=64
2^4=16
hope this helps!
6000 is what percent of 6046?
I'll explain more if you are confused.
Answer:
362760%
Step-by-step explanation:
sorry if its wrong, it might have decimals or something but yeah.