What is the square root of -1?

Answer:

32ed

Step-by-step explanation:

Answer: 4 and 2

Step-by-step explanation:

a + b = 6

a - b = 2

Sum these equations, we get 2a = 8, then a = 4

Substitute to one of these equations, we get 4 - b = 2, so b = 2

Prove: The sum of 24 and 42 is 66, and 4 and 2 differ by 2 are both correct!

Answer:

The answer is D. (8•4 ) + (2•4) + 2

Answer:

The answer is only D.

Step-by-step explanation:

So let's look at this together:

Before we start anything, we MUST solve the equation that we are trying to find first. That way we can compare answers.

This is the problem we must solve using PEMDAS: (8 + 2) x 4 + 2 = 42  (USING PEMDAS)

Choice A:

8 x 4 + 2 + 2 =

We would need to use PEMDAS

P = Parenthesis

E = Exponents

M = Multiplication

D = Divison

A = Addition

S = Subtract

So for Choice A, we would go in order so starting with Parenthesis there is none, so we move on to Exponents. Since there is none we go to Multiplication. Now we Multiply 8 x 4 and get 32 and add 2 + 2. The sum doesn't add up to 42, so we know that the answer choice is wrong. If you keep doing this for all the answer choices, all of them would have a different number that wouldn't equal 42.

EXCEPT D. (8 x 4) + (2 x 4) + 2 = 42

                                              HOPE THIS HELPS!

Answer:

Becky is 7 years old.

Step-by-step explanation: Let b - Becky's age ; Equation - 3b = 21. Divide both size by 3 to isolate the variable.

Answer:

Becky's 7 seven years old

Step-by-step explanation:

If 21 = 3x

x = 21/3

x = 7

Hope this helps :)

Pls brainliest...

Answer:

three

Step-by-step explanation:

stem. is the tens place and the leaf is the. ones place

so you want to find 68 so you look in the stem column and look for six

in the row there are 6 numbers which mean:

60, 61, 67, 68, 68, 68

as you can see there is three 68 there for the answer ths 3

No. The reported return rate appears lower than expected.

To determine whether the reported rate of return is reasonable or not, we can calculate the expected rate of return based on the investment amount and the ending value of the account.

First, we need to calculate the total number of quarters that have elapsed between the initial investment and the current quarter. Let's assume that the investment has been held for n quarters.

Then, we can use the following formula to calculate the expected rate of return:

Expected rate of return = (Ending value / Initial investment) ^ (1/n) - 1

Plugging in the given values, we get:

n = 1 (since we are only given information for a single quarter)

Initial investment = 26,245

Ending value = 26,292

Expected rate of return = (26,292 / 26,245) ^ (1/1) - 1 = 0.18%

Comparing the expected rate of return of 0.18% with the reported rate of return of -0.02%, we can see that they are quite different. However, it's important to note that a single quarter's rate of return may not be indicative of the overall performance of the investment.

Therefore, while the reported rate of return seems lower than expected, we would need to consider the performance over a longer period of time to make a more informed assessment of the investment's performance.

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Answer: 2/5

Step-by-step explanation:

Answer:

4x+5y=15

Step-by-step explanation:

Btw brainliest me plss

If it dilated by a factor of 2, we will multiply the coordinates by 2 to have:

A'(11, 9) B (12, 4) C (7, 3) D (6,8)

If the coordinate points A (1 1/2, 12) B (-3, 6) C (-9, 9) is dilated by a factor of 1 1/3, the resulting coordinates will be A'(3, 16) B'(-4, 8) C'(-12, 12)

Dilations is a transformation technique used to enlarge or diminish an image.

Given the coordinate points A (5.5, 4.5) B (6, 2) C (3.5, 1.5) D (3,4), it dilated by a factor of 2, we will multiply the coordinates by 2 to have:

A'(11, 9) B (12, 4) C (7, 3) D (6,8)

Similarly if the coordinate points A (1 1/2, 12) B (-3, 6) C (-9, 9) is dilated by a factor of 1 1/3, the resulting coordinates will be A'(3, 16) B'(-4, 8) C'(-12, 12)

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If you are running a fuel economy study. the unit rate for miles per gallon for each​ car is 22.8 miles and 23.04 miles and the fastest car is Red car.

Units rate = Distance /Time

Blue car

Unit rate = 28 1/2 miles ÷ 1 1/4 gallons of gasoline

Unit rate = 28.5miles ÷ 1.25 gallons of gasoline

Unit rate = 22.8 miles

Red car

Unit rate = 28 4/5 miles ÷  4/5 gallons of gasoline

Unit rate = 28.8miles ÷ 0.8 gallons of gasoline

Unit rate = 23.04 miles (Fastest)

Therefore the unit rate for each​ car is 22.8 miles and 23.04 miles and the fastest car is Red car.

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Answer:

You can make equivalent fractions by multiplying or dividing both top and bottom by the same amount. You only multiply or divide, never add or subtract, to get an equivalent fraction. Only divide when the top and bottom stay as whole numbers

Answer:

Step-by-step explanation:

By using multiplication or division. Multiplying the numerator and denominator or simplifying which is also division.

Answer:

Explanation:

Here, we want to get the survey question that is good

From what we have, while other questions are about the individual himself, the others are about another individual (with different

The other questions are there to be informed about the patterns and variability in the actions taken by different individuals

Thus, from what we have, option A is not a good survey question

Answer:

B I'm pretty sure

Step-by-step explanation:

Answer:

Number greater than 2

Step-by-step explanation:

.5 is between zero and one

\(\frac{2}{.5}\) = 4

B. Greater than 2

Step 1: Positive 2 is a number greater than 0.

Step 2: When a number is divided by a number between 0 and 1, the quotient will always be greater than the number being divided, meaning that the quotient will be greater than 2.

Step 3: For example, if 2 is divided by 0.5, the quotient will be 4, which is greater than 2.

Step 4: Therefore, the correct answer is B. Greater than 2.

If you have any additional questions or need further assistance, please let me know.

We can see that, when the input is 5, the output is 24.

Here we have the equation:

\(y = x^2 - 1\)

Where y is the output and x is the input.

We want to evaluate it with the input as 5, so we need to replace the variable x by the number 5, we will get:

\(y = 5^2 - 1 = 24\)

Then we can see that, when the input is 5, the output is 24.

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There is a typo here. We cannot evaluate the given expression if there is no b and z to replace with the given values. Get it?

Answer:

The circle's circumference is approximately 106.81 centimeters.

Explanation:

The formula for the circumference of a circle is C = 2πr, where C is the circumference, π is pi (approximately 3.14), and r is the radius of the circle.

So, for a circle with a radius of 17 centimeters, its circumference can be found by:

C = 2πr

C = 2 x 3.14 x 17

C ≈ 106.81 cm

Therefore, the circumference of the circle is approximately 106.81 centimeters.

Answer:

Less than 4/10

Step-by-step explanation:

First lets convert both fractions to a common denominator:

16 and 10 can both go into 80 equally.

Now lets convert the fractions so they have a denominator of 80:

(6/16)    *5  = 30/80

(4/10)    *8 = 32/80

we can multiply the fractions to get just the numerator   (*80)

Now compare 30 to 32.  As you can see 32 is greater meaning that 6/16 is less that 4/10.

The probability of that exactly 8 of them favor the building of the health center is 0. 399

From the information given, we have that 70% of the community favors the building of the health center

Number of citizens chosen = 14

P(8) = \(\frac{8}{14}\) × \(\frac{70}{100}\)

P(8)  = \(0. 57\) × \(0. 7\)

P(8) = \(0. 399\)

Thus, the probability of that exactly 8 of them favor the building of the health center is 0. 399

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Answer: Option 2

Step-by-step explanation:

\(|h-2|=4\\\\h-2=\pm 4\\\\h=-2, 6\)

Samuels plane arrive will arrive at 10:10 am, in the given algebraic problem.

An algebraic expression is a mathematical expression that uses coefficients, unknown variables, algebraic operations, and constants. However, it is not acceptable to use an equality symbol in an expression.

Mathematical expressions and sentences come in a wide variety. the relationships between equations, numerical expressions, and algebraic expressions.

The difference between 10 am and 6 am

is 4 hours, So the the time he arrives will be a multiple of 50 grater than 4 hours

50x > 4 × 60

50x > 240

x > 240/50

x > 4.8

x = 5 (as 5 is nearest single digit no. to 4.8)

50x = 50 × 5

= 250 minutes

250 mins = 4 hours and 10 mins

6 am  + 4 hours and 10 mins

= 10 hour and 10 min or 10:10 am

Thus, Samuels plane arrive will arrive at 10:10 am, in the given algebraic problem.

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To evaluate 10a - 3, when a = 3,just replace the value of a into the equation, as follows:

10(3) - 3 =

= 30 - 3=

= 27

Answer:

\(a (5)\)

\(b (0,5)\)

\(c (-3,0,5)\)

\(d (1/3, 5/8, 66/67, -1.27)\)

\(e( \sqrt{2} \: \sqrt{7} \: )\)

\(f( - 3 \: 5 \: \frac{1}{3} \: \frac{5}{8} 0 \: \sqrt{2 \:} \sqrt{7} - 1.27 \: \frac{66}{67} )\)

The area of a rectangle ABCD is 60 square inches and the area of triangle ACD is 30 square inches.

The area occupied by a rectangle within its boundary is called the area of the rectangle. The formula to find the area of a rectangle is Area = Length × Breadth.

In the given rectangle ABCD, AD= 5 in. and DC=12 in.

a) Now, area of rectangle ABCD =DC×AD

= 12×5

= 60 square inches

b) By joining vertices A and C, we get triangle ACD.

c) Now, the area of triangle ADC is

Area =1/2 ×Base×Height

= 1/2 ×12×5

= 30 square inches

Therefore, the area of a rectangle ABCD is 60 square inches.

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Answer:

C

Step-by-step explanation:

2x + 1 = 85 (Alternate Interior Angles Theorem)

2x = 84

x = 42

(3y + 5) + (2x + 1) = 180 (Linear Pair Theorem)

3y + 5 + (85) = 180

3y + 5 = 95

3y = 90

y = 30

Answer:

x = 42, y = 30

Step-by-step explanation:

Alternate angles are equal so

85 = 2x + 1

2x = 84

x = 42°

Linear pair

(3y + 5) + (2x + 1) = 180

3y + 5 + 85 = 180

3y = 90

y = 30°

So I think the answer is x = 42° and y = 30°.

Hope it helps.

The volume of the tree stump is approximately 1005.3 cubic inches when rounded to the nearest tenth.

To calculate the volume of the tree stump, we can use the formula for the volume of a cylinder, which is given by:

Volume = π * r^2 * h

Given:

Radius (r) = 20 inches

Height (h) = 0.7 feet

First, let's convert the height from feet to inches since the radius is already in inches. There are 12 inches in 1 foot, so:

Height (h) = 0.7 feet * 12 inches/foot = 8.4 inches

Now, we can substitute the values into the volume formula:

Volume = π * (20 inches)^2 * 8.4 inches

Calculating the volume:

Volume = 3.14159 * (20 inches)^2 * 8.4 inches

≈ 3.14159 * 400 inches^2 * 8.4 inches

≈ 1005.3096 cubic inches

Rounding the volume to the nearest tenth:

Volume ≈ 1005.3 cubic inches

Therefore, the volume of the tree stump is approximately 1005.3 cubic inches when rounded to the nearest tenth.

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Answer:

its 2x^4+9x^3+3x^2+12x_2.

Answer:

Among their remains is the second oldest mathematical object (the oldest is here) in Africa. Some say that the Ishango Bone is the oldest table of prime numbers.

Step-by-step explanation:

On Ishango bone very old object does a table of prime numbers appear.

A prime number is a whole number greater than 1 whose only factors are 1 and itself.

A factor is a whole number that can be divided evenly into another.

Ishango bone is old, but the oldest "mathematical artifact" currently known is much older.

The oldest is a piece of baboon fibula with 29 notches, dated 35,000 BC.

This older bone was discovered in the mountains between South Africa and Swaziland.

There is also a Czechoslovakian wolf's bone with 57 notches that dates from 30,000 BC.

Bushmen clans in Nambia use similar bones for calendar sticks today.

Hence, on Ishango bone very old object does a table of prime numbers appear.

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The remaining Kit volume in the syringe is sufficient to correct the dose to 20 mCi.

To solve this problem, we can use the concept of radioactive decay and the decay factor. Here's how we can calculate the required volume to correct the dose:

Determine the initial activity of the kit:

Initial activity = 180 mCi

Calculate the decayed activity at 9:30 (after 1.5 hours):

Decay factor = 0.841

Decay activity = Initial activity * Decay factor

Calculate the remaining activity after withdrawing 20 mCi at 8 am:

Remaining activity = Initial activity - 20 mCi

Calculate the remaining activity at 9:30:

Remaining activity at 9:30 = Remaining activity * Decay factor

Calculate the desired activity at 9:30 (20 mCi):

Desired activity at 9:30 = 20 mCi

Calculate the volume needed to achieve the desired activity:

Volume needed = Desired activity at 9:30 / Remaining activity at 9:30 * Volume at 9:30

Calculate the remaining volume at 9:30:

Remaining volume = Volume at 8 am - Volume withdrawn - Volume accidentally discharged

Calculate the volume that needs to be added:

Volume to be added = Volume needed - Remaining volume

Let's perform the calculations step by step:

Determine the initial activity of the kit:

Initial activity = 180 mCi

Calculate the decayed activity at 9:30 (after 1.5 hours):

Decay factor = 0.841

Decay activity = 180 mCi * 0.841 = 151.38 mCi

Calculate the remaining activity after withdrawing 20 mCi at 8 am:

Remaining activity = 180 mCi - 20 mCi = 160 mCi

Calculate the remaining activity at 9:30:

Remaining activity at 9:30 = 160 mCi * 0.841 = 134.56 mCi

Calculate the desired activity at 9:30 (20 mCi):

Desired activity at 9:30 = 20 mCi

Calculate the volume needed to achieve the desired activity:

Volume needed = (Desired activity at 9:30 / Remaining activity at 9:30) * Volume at 9:30

Volume at 9:30 = Remaining volume = 30 ml - (30 ml / 2) = 15 ml

Volume needed = (20 mCi / 134.56 mCi) * 15 ml = 2.236 ml

Calculate the remaining volume at 9:30:

Remaining volume = 30 ml - (30 ml / 2) = 15 ml

Calculate the volume that needs to be added:

Volume to be added = Volume needed - Remaining volume = 2.236 ml - 15 ml = -12.764 ml

Since the calculated volume to be added is negative, it means that no additional volume is required. The remaining Kit volume in the syringe is sufficient to correct the dose to 20 mCi.

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