-i^2 = 1
so
x^2+25 = x^2 - 25i^2
= (x + 5i)(x - 5i)
The expression over complex numbers will be (x + 5i)(x - 5i).
What are complex numbers?Every complex number may be represented in the form a + bi, where a and b are real numbers.
A complex number is an element of a number system that extends the real numbers with a specific element labelled I sometimes known as the imaginary unit, and satisfies the equation i² = 1.
The given expression is x²+25.
i² = -1
x²+25 = x² - 25i²
x²+25 = (x + 5i)(x - 5i)
Therefore, the expression over complex numbers will be (x + 5i)(x - 5i).
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Ms.Omalley's cousin lives 1,650 miles away.Ms.Omalley's won a gift card for 100 gallons of gas.If her car can travel 35 miles on each gallon,can she do a roundtrip to see her cousin on the free gas? Explain how you know.
Anyone please help me. Will give you brainliest.
1.When you rotate a figure counterclockwise, is that a positive rotation or a negative rotation?
2.Rotating from the x-axis to the y-axis is a rotation of how many degrees?
1. When you rotate a figure counterclockwise, is that a positive rotation or a negative rotation? It is a positive rotation. Positive rotations are counterclockwise or anti-clockwise.
2. Rotating from the x-axis to the y-axis is a rotation of how many degrees? it is generally 180 degrees. To rotate a figure 180 degrees, we apply the rule (x, y) → (-x, -y).
i dont really know about 2. but i think for 1. is it is a negative rotation if you spin it like that.
Becca made 3 dozen cookies with 2/3 of a batch of her mother's cookie dough. How many cookies will she make if she uses that entire batch?
15 points all other rewards will be given please no non-scene
uoy knaht
Consider these three numbers written in scientific notation.
1.67 x 10-4
9.7 x 10-6
4.5 x10-9
Which shows the numbers in order from least to greatest?
A.
1.67 x 10-4 ,
9.7 x 10-6,
4.5 x 10 -9
B.
4.5 x 10-9,
9.7 x 10-6 ,
1.67 x 10 -4
C. 1.67 x10 -4 ,
4.5 x 10-9 ,
9.7 x 10-6
D. 9.7 x 10-6 ,
4.5 x 10-9,
1.67 x 10-4
Why hello there
The correct answer is B
If my answer helped please mark me as brainliest thank you and have the best day ever!
7. A line in the Cartesian plane passes through the points (1, 3) and (5, 4). What is the slope of the line? A. 1/4 B. –4/1 C. 4/1 D. –1/4
A
to calculate the slope m , use the ' gradient formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (1, 3) and (x₂, y₂ ) = (5, 4)
m = [tex]\frac{4 - 3}{5 - 1}[/tex] = [tex]\frac{1}{4}[/tex] → A
Find the area of the rectangle 9ft and 14ft
You simply need to mulotiply those two numbers
Then u get 126!
Easy Peasy
The 4 people in your crew each spent 4 hours laying sod. How many person-hours is this?
Since there are 4 people and they each spent 4 hours working, all we have to do is multiply the number of people (4) by the amount of hours each person spent (4)
4 x 4 = 16
Therefore, the total amount of hours is 16
Hope this helps you
-AaronWiseIsBae
Answer:
16 hours
Step-by-step explanation:
Given: There are 4 people in your crew.
Each spent 4 hours of laying sod.
To find the person hours, we have to multiply the number of people (4) by the amount of hours each person spent (4).
Total number of hours = Number of persons * Number of hours spent
Total number of hours = 4 x 4 = 16 hours
Therefore, the total amount of hours is 16.
Find two consecutive positive integers such that the sum of their squares is 841
Let x = 1st positive integer
Let x + 1 = 2nd positive integer
As give, their sum of squares is 841
[tex]x^{2}+(x+1)^{2}=841[/tex]
[tex]x^{2}+x^{2}+2x+1=841[/tex]
[tex]2x^{2}+2x+1=841[/tex]
[tex]2x^{2}+2x-840=0[/tex]
factor 2 out, [tex]x^{2}+x-420=0[/tex]
[tex]x^{2}+21x-20x-420=0[/tex]
[tex]x(x+21)-20(x+21)=0[/tex]
(x+21)(x-20)
This gives, x=20 and =-21 (neglect the negative value)
So, x = 20
x+1 = 21
So, the two numbers are : 20 and 21
A 20 x 32 rectangle is embedded inside a 98 x 108 rectangle. They share a vertex and their sides partially over lap as shown. Find the distance between the centers of the two rectangles.
Answer:
The distance is 55 units.
Step-by-step explanation:
Think of the bottom left corner of the rectangles, the shared vertex, as the origin of a coordinate plane. The positive x-axis is the lower 108-unit long horizontal side, and the positive y-axis is the left vertical 98-unit long side. The bottom left vertex is (0, 0). The center of the small rectangle is at (10, 16). The center of the large rectangle is at (54, 49). Now use the distance formula to find the distance between those two points.
[tex] d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} [/tex]
[tex] d = \sqrt{(54 - 10)^2 + (49 - 16)^2} [/tex]
[tex] d = \sqrt{44^2 + 33^2} [/tex]
[tex] d = \sqrt{1936 + 1089} [/tex]
[tex] d = \sqrt{3025} [/tex]
[tex] d = 55 [/tex]
Use the complex conjugate to find the absolute value of 8+12i
A. 12
B.Square root of 208
C. Square root of 84
D. 8
Answer:
A. 12
Step-by-step explanation:
i= use complicated conjugate to search out definite quantity of 8 + 12i
i = 12i
i= twelve × ei 90°
i = twelve × (cos 90° + i sin 90°)
r = |i| = twelve
The absolute value of the complex number 8 + 12i is found by squaring the real part, squaring the imaginary part, adding these two results, and then taking the square root. This results in the square root of 208.
Explanation:The absolute value of a complex number a + bi is calculated through the formula sqrt(a² + b²). So, to find the absolute value of the complex number 8 + 12i, we substitute a with 8 and b with 12. We can perform the calculations as follows:
Square the real part, a: 8² = 64,Square the imaginary part, b: 12² = 144,Add the results: 64 + 144 = 208,Take the square root of the sum: sqrt(208). Thus, the absolute value is the square root of 208.Learn more about Complex Numbers here:https://brainly.com/question/20566728
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What is the remainder of 23870 divide by 38
The remainder when dividing 23870 by 38 is 16.
Explanation:To find the remainder when dividing 23870 by 38, you divide the larger number (the dividend) by the smaller number (the divisor). If the division operation does not produce a whole number, the 'left over' digits are considered the remainder. When you divide 23870 by 38, the quotient (or the answer) is 628, and the remainder is 16. Therefore, 16 is the remainder when 23870 is divided by 38.
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Select the multiplication sentence that applies the associative property of multiplication to the example. Example: (5 × 3) × 2 = 30 A. (5 + 3) × 2 = 16 B. 5 × (3 + 2) = 25 C. 5 × (3 × 2) = 30 D. 2 + (4 × 7) = 30
Answer : C
A. (5 + 3) × 2 = 16
Here we have 5 +3 . there is a + sign in between. so it does not comes under Associative property of multiplication
B. 5 × (3 + 2) = 25
We have 3 + 2 . there is a + sign in between. so it does not comes under Associative property of multiplication
C. 5 × (3 × 2) = 30
we have 5 times 3 times 2. so it comes under Associative property of multiplication
D. 2 + (4 × 7) = 30
We have 2 + . there is a + sign in between. so it does not comes under Associative property of multiplication
Algebra 2 help!! Find the value of k
13 By the factor theorem, if the function is divisible by x - 3 then f(3) = 0. So we have:-
2(3)^3 + k(3)^2 + 7(3) - 3 = 0
9k = 3 - 21 - 54 = -72
k = -72/9 = -8 answer
14. Similarly , f(-4) = 0 , so we have:-
(-4)^3 + 9(-4)^2 + k(-4) - 12 = 0
-64 + 144 - 4k - 12 = 0
4k = -64 + 144 - 12 = 68
k = 68/4
k = 17 answer
Juan drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 8 hours. When Juan drove home, there was no traffic and the trip only took 6 hours. If his average rate was 16 miles per hour faster on the trip home, how far away does Juan live from the mountains?
Answer:Juan live 384 miles from the mountains.
Step-by-step explanation:
Let x be the speed of Juan for trip to the mountains
Time taken by Juan to reach the mountains=8 hours
then distance traveled by Juan for trip to mountain= speed × time=8x..........(1)
Time taken by Juan to reach the home= 6 hours
Speed increased by 16 miles per hour ∴ the resultant speed to reach the home by Juan =x+16
then distance traveled by Juan to reach the home =speed × time
= (x+16)6......................(2)
Now distance is same in both the case (1) and (2),we get
8x= (x+16)6
⇒8x=6x+96..............(by solving brackets)
⇒2x=96..............(subtracting 6x from both sides )
⇒x=48....................(dividing 2 from both sides)
Putting this value in (1) ,we get
Distance traveled by Juan for trip to mountain =8×48=384 miles.
∴ Juan live 384 miles from the mountains.
By using the rate and time of journey, it is determined that Juan lives 384 miles away from the mountains.
Explanation:This question is about calculating the distance based on the rate and time of travel. Let's denote the distance to the mountains as 'D'. According to the question, Juan drove to the mountains and it took 8 hours. On his way home, there was no traffic and he was able to travel at a faster rate, which took 6 hours.
Let's denote the speed to the mountains as 'S', therefore his speed back was 'S + 16' (16 miles per hour faster). From the formula speed = distance/time (D = S*T), we know that the distance to and from the mountains remained the same, so we can set up the following equation to solve for the unknown distance D:
8S = 6(S + 16)
Solving for 'S' we get 48 mph. We can substitute S=48 into the first equation to get D = 8S = 8*48 = 384 miles. So, Juan lives 384 miles away from the mountains.
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Find the sum of the first 4 terms of the series.
2-8+32-128+...
a. –101
c. –102
b. –103
d. –104
The sum of the first four terms of the series would be c. -102
Julia rounded to the nearest ten to estimate the difference between two numbers. The estimated difference was 10. What are four pairs of numbers she might have sustractrd?
To round off to 10, the difference should range from 5 to 14. If the difference between two numbers is from 5 to 14, they all are rounded to 10.
Example:
[tex]18-9=9[/tex] (near to 10)
[tex]26-15=11[/tex]
[tex]46-39=7[/tex]
[tex]50-42=8[/tex]
If Julia rounded to the nearest ten to estimate the difference between two numbers. The estimated difference was 10. (18,9)(25,14), (36,22) and (45, 38) are few pairs of numbers she might have subtracted.
What is Number system?A number system is defined as a system of writing to express numbers.
The difference should range from 5 to 14.
Difference in math is the result of one of the important mathematical operations, which is obtained by subtracting two numbers
To round off to 10.
If the range of difference between two numbers is from 5 to 14. Then those numbers are rounded to ten.
Let us consider some pairs of numbers whose difference is rounded to ten.
18-9=9
25-14=11
36-22=14
45-38=7
Hence (18,9)(25,14), (36,22) and (45, 38) are few pairs of numbers she might have subtracted.
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a boat is marked up to 20% on the original price . The original price was $50 what is the sales price of the boat before sales tax?
Answer:
60
Step-by-step explanation:
Answer:
60 dollars.
Step-by-step explanation:
Markup is nothing but the difference between the selling price of a good or service and its cost. It is expressed as a percentage above the cost. In short, we can say that it is the added price over the total cost of the good or service that provides the seller with a profit.
Original price = 50 dollars
ADD: 20% on original price = Markup price = 50(20/100) = 10 dollars
Hence Sales price = 50+10 = 60 dollars
Kelly bought a new car for $20,000. The car depreciates at a rate of 10% per year. Write an equation to model the car's value.
y=20,000-.10x
with x being the number of years
Answer:
[tex]y=\$20,000\cdot (0.90)^x[/tex]
Step-by-step explanation:
We have been given that Kelly bought a new car for $20,000. The car depreciates at a rate of 10% per year. We are asked to write an equation to model the car's value.
Since car's value depreciates by 10% per year, so value of car is depreciating exponentially.
We know that an exponential decay function is in form [tex]y=a\cdot (1-r)^x[/tex], where
a = Initial value,
r = Decay rate in decimal form.
Let us convert 10% into decimal form as:
[tex]10\%=\frac{10}{100}=0.10[/tex]
Upon substituting our given values in decay formula, we will get:
[tex]y=\$20,000\cdot (1-0.10)^x[/tex]
[tex]y=\$20,000\cdot (0.90)^x[/tex]
Therefore, our required equation would be [tex]y=\$20,000\cdot (0.90)^x[/tex].
5. Solve the inequality. Show your work. 5y + 16 ≤ 56-
Answer: y ≤ 8
Solution:
Step 1: Rearrange the equation so that all the like terms are on one side
5y + 16 ≤ 56
= 5y ≤ 56 - 16 constants on one side and variable on the other
= 5y ≤ 40
= y ≤ 8
Hope the solution helps to understand the question!
Tip: Remember that if the inequality is multiplied by a negative sign the inequality sign flips.
Find the perimeter of a triangle garden that measures 10 feet by x feet by (2 x+7) feet . Use p=a+b+c
P = 10 + x + 2x + 7
= (10 + 7) + (x + 2x)
= 17 + 3x
Therefore, the perimeter is 17 + 3x feet.
Answer:7x+12
Step-by-step explanation:
what two numbers have an absolute value of 21.63
The correct answer would be -21.63 and +21.63
98 POINTS PLEASE HELP! How does the graph of f(x) = (x − 1)^2 relate to the basic function f(x) = x^2?
a.
shift 1 unit to the left
c.
shift 1 unit up
b.
shift 1 unit to the right
d.
shift 1 unit down
When you graph the two functions given, the graph B) shift 1 unit to the right.
Graph the two functions, see attached pictures:
~Rise Above the Ordinary
1.819÷1.2 round your answer to the nearest tenth
Kate sets a goal to walk 3 miles every day for a year. How many miles more or less than 1,000 miles will she walk in the year? A. 33 miles less B. 95 miles more C. 33 miles more D. 95 miles less
3 miles per day * 365 days = 1095
1095-1000=95
The answer is B. 95 miles more.
What is the correct evaluation of 2a2 - 3b2 when a is equal to 2 and b is equal to -1?
A.11
B.5
C.-5
D.-11
The correct answer is A. 11
3( x -5)- 5x= 25+ 6x What is the answer and how do you solve this??
To solve this equation, distribute, combine like terms, and isolate the variable, x.
Explanation:To solve this equation, we need to simplify both sides and isolate the variable, x.
Starting with the left side, distribute the 3 to the terms inside the parentheses: 3x - 15 - 5x = 25 + 6x.
Combine like terms on both sides of the equation: -2x - 15 = 25 + 6x.
Add 2x to both sides of the equation and add 15 to both sides: -15 - 25 = 6x + 2x.
Simplify the equation: -40 = 8x.
Finally, divide both sides by 8 to solve for x: x = -5.
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There are 87.4 calories in one serving of cherries. How many calories are in 3.85 servings?
Answer:
336.49 calories.
Step-by-step explanation:
if; 87.4 calories = 1 serving of cherries
so; how much calories = 3.85 serving of cherries
hence:
3.85 seving * 87.4 calories / 1 serving
the answer is
336.49 calories
X to the power of 2 equal 100 how to solve
Answer: {-10, +10}
Step-by-step explanation: A common mistake in this problem would be to say that if x² = 100, x must equal 10.
Remember however that before you do anything else you must set the equation equal to 0.
So our first step is to subtract 100 from both sides to get x² - 100 = 0. Next, factor the left side to get (x + 10)(x - 10) = 0.
So either x + 10 = 0 or x - 10 = 0.
Solving for x in each equation, we have x = -10 or x = +10.
So our answer is not just 10, it's -10 or +10.
I have also attached my work in the image provided.
Someone help please?
Answer:
43:76
Step-by-step explanation:
A rectangle is four times as long as it is wide. If it has an area of 36 square inches, what are its dimension?.
a. 6 by 6
b. 3 by 12
c. 4 by 9
d. 4 and 8
Answer:
b on edge
Step-by-step explanation:
The dimensions of the rectangle are 3 inches by 12 inches. This conclusion is achieved by using the supplied information that the rectangle is four times as long as it is wide, and the area is 36 square inches.
Explanation:The problem is describing a rectangle whose length is four times its width and has an area of 36 square inches. The formula for the area of a rectangle is length x width. Given the rectangle is four times as long as it is wide, we can represent the width as 'w' and the length as '4w'. Therefore, the calculation would look as follows: 4w * w = 36. Solving this equation we get w^2=9, so w=3. Consequently, the length would be 4*3=12. Therefore, the dimensions of the rectangle are 3 inches by 12 inches.
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