7th grade math -7x + 4x = 9 HELP FAST

Answer:

1) 48

2)44

Step-by-step explanation:

Answer:  48 44 Are The Correct Answers

Step-by-step explanation:Hope This Helps

Answer:

6:10

Step-by-step explanation:

Signs to Total

Answer:6 to 4

Step-by-step explanation:This is the answer because if you count all of the ”at” symbols, there are 6 and if you count the number of “and” symbols, there are 4. So your answer is 6 to 4.

To simplify the expression cos^2(t) - sin^2(t) / (12cos(-t)sin(-t), we can use trigonometric identities to rewrite and simplify the expression.

The equivalent expression to cos^2(t) - sin^2(t) / (12cos(-t)sin(-t) is -1/12.

To simplify the expression, let's start by using the trigonometric identity cos^2(t) - sin^2(t) = cos(2t). This identity states that the difference of squares of cosine and sine functions is equal to the cosine of twice the angle.

Now, let's substitute this identity into the expression:

cos^2(t) - sin^2(t) / (12cos(-t)sin(-t)) = cos(2t) / (12cos(-t)sin(-t))

Next, we can use the identity cos(-t) = cos(t) and sin(-t) = -sin(t) to simplify further:

cos(2t) / (12cos(-t)sin(-t)) = cos(2t) / (-12cos(t)(-sin(t)))

Now, we can cancel out the negative signs and simplify:

cos(2t) / (-12cos(t)(-sin(t))) = cos(2t) / (12cos(t)sin(t))

Finally, we can simplify the expression cos(2t) / (12cos(t)sin(t)) using another trigonometric identity: cos(2t) = 2cos^2(t) - 1.

cos(2t) / (12cos(t)sin(t)) = (2cos^2(t) - 1) / (12cos(t)sin(t))

Now, we can simplify the expression further:

(2cos^2(t) - 1) / (12cos(t)sin(t)) = -1/12

In conclusion, the expression cos^2(t) - sin^2(t) / (12cos(-t)sin(-t)) is equivalent to -1/12. By using trigonometric identities and simplifying step by step, we arrived at the simplified form of the expression.

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A $100 bill and a dime differ by a magnitude of 3.

Orders of magnitude can be used in order to define large quantities efficiently and more easily. A dime is a currency used in the US that is equivalent to 0.10 dollars.

So we can represent a dime as 10-¹ of a dollar

and we can write 100 dollars as 10² of a dollar.

Therefore the difference in the order of magnitude of 100 dollars and a dime would be the difference between the powers or exponents of those two quantities,

That is,

2-(-1) = 3

So, the dollar differs by a magnitude of 3 from a dime.

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Answer:

34 is the right answer I have already done it

Answer:

try -5

Step-by-step explanation:

mainly because it says -3 plus 5 and there's only 4 and 5 so It can't really go further

Answer:try -5

Step-by-step explanation:

mainly because it says -3 plus 5 and there's only 4 and 5 so It can't really go further

The result is 20.997 if 497 is Divided by 23.67 and tenth 2.099 and hundredth is 0.2099

A decimal is a number that has two parts one is whole number, and the remaining is fractional part. The two parts are separated by a point named decimal point.

Hundredth means the fraction that is equal to one is divided by 100

and tenth of a number means the number is divided by 10.

As example a hundredth of 4444 is 44.44 and tenth of 4444 is 444.4.

We are given two numbers 497 and 23.67

In the above, 497 is a whole number and 23.67 is a decimal number.

In order to divide these, we can multiply the two numbers by 100

and get 49700 and 2367

now 49700 is divided by 2367

and the result is 20.99

In the next, the tenth of 20.99 is 2.099 and hundredth of 20.99 is 0.2099

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The volume of the given rectangular prism is 27.6 cubic cm.

Length of the prism = 4⅗ cm

Width of the prism = 3 cm

Height of the prism = 2 cm

Volume of the rectangular prism = length × width × height

= 4⅗ × 3 × 2

= 23/5 × 6

= 138/5

= 27.6 cm³

In conclusion, the rectangular prism has the volume 27.6 cm³

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The solution of the system of equations is (x, y) = (1/3, 1/3).

To solve the given system of equations, we can use any of the following three methods; the substitution method, the elimination method (also known as the addition/subtraction method), and the graphical method. Below, we will solve it using each of these methods.

1. Substitution method:

We will use the substitution method to solve the system of equations. Step-by-step solution is shown below; Given equations are

Y = 3y - 2x ...(1)2y = 3x - 2 ...(2) From equation (1), we have

Y + 2x = 3y ...(3)Now substitute equation (3) into equation

(2)2y = 3x - 2 ...(2)Y + 2x = 3y ...(3)2(3y - 2x) = 3x - 2

Multiplying both sides by 2:

6y - 4x = 3x - 2 Grouping like terms:

6y - 3x = 2 Adding 3x to both sides:

6y = 3x + 2Dividing both sides by 6:

y = (3/6)x + 2/6y = (1/2)x + 1/3

Therefore, the solution of the system of equations is (x, y) = (1/3, 1/3).

2. Elimination method:

We will use the elimination method to solve the system of equations. Step-by-step solution is shown below; Given equations are

Y = 3y - 2x ...(1)2y = 3x - 2 ...(2)Multiplying equation (1) by 2,

we get;2Y = 6y - 4x ...(3)Multiplying equation (2)

by -3, we get;-6y = -9x + 6 ...(4) Adding equations (3) and (4),

we get;-4x = -9x + 8

Simplifying;-4x + 9x = 8x = -8x = -2

Therefore, we found the value of x, which is -2.

Substitute the value of x in either equation (1) or (2);

If we substitute x = -2 in equation (1), we get;

Y = 3y - 2(-2)Y = 3y + 4Y - 3y = 4Y = 4/2Y = 2Substitute the value of y in equation (1)

;Y = 3y - 2xY = 3(2) - 2(-2)Y = 6 + 4Y = 10

Therefore, the solution of the system of equations is (x, y) = (-2, 10/2).3.

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a) The number of permutations of the letters in TRISKAIDEKAPHOBIA is: 168,038,400. b) The number of permutations of the letters in FLOCCINAUCINIHILIPILIFICATION is: 1.142 x 10^26. c) The number of permutations of the letters in PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS is: 1.196 x 10^64.

Permutations of letters in words:

(a) The word TRISKAIDEKAPHOBIA has 16 letters.

The letters "I" and "A" are repeated three times, while the letter "O" is repeated twice.

We can use the formula:

n! / p1!p2! ... pk!

Where n is the total number of letters, and p1, p2, ... pk are the repeated letters with counts.

Therefore, the number of permutations of the letters in TRISKAIDEKAPHOBIA is:

16! / (3! * 3! * 2!) = 168,038,400.

(b) The word FLOCCINAUCINIHILIPILIFICATION has 29 letters.

The letters "I" are repeated six times, while the letters "L" and "N" are repeated twice.

We can use the formula:

n! / p1!p2! ... pk!

Where n is the total number of letters, and p1, p2, ... pk are the repeated letters with counts.

Therefore, the number of permutations of the letters in FLOCCINAUCINIHILIPILIFICATION is:

29! / (6! * 2! * 2!) = 1.142 x 10^26.

(c) The word PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS has 45 letters.

Each letter is unique.

We can use the formula:

n! / p1!p2! ... pk!

Where n is the total number of letters, and p1, p2, ... pk are the repeated letters with counts.

Therefore, the number of permutations of the letters in PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS is:

45! = 1.196 x 10^64.

(d) The word DERMATOGLYPHICS has 14 letters. Each letter is unique.

We can use the formula:

n! / p1!p2! ... pk!

Where n is the total number of letters, and p1, p2, ... pk are the repeated letters with counts.

Therefore, the number of permutations of the letters in DERMATOGLYPHICS is:

14! = 87,178,291,200.

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The operation with logarithmic Big O run-time complexity is finding an item in a binary search tree.

A logarithmic time complexity, denoted as O(log n), means that the runtime of an algorithm increases logarithmically with the size of the input. In the given options, the operation that exhibits logarithmic complexity is finding an item in a binary search tree.

A binary search tree (BST) is a data structure where each node has at most two children, and the values in the left subtree of a node are less than its value, while the values in the right subtree are greater. When searching for an item in a binary search tree, the algorithm starts at the root and compares the target value with the current node's value. Based on the comparison, it continues the search either in the left or right subtree, effectively reducing the search space by half at each step. This binary search process continues until the target item is found or the search reaches a leaf node.

Since the binary search tree divides the search space in half at each step, the time complexity of finding an item in a binary search tree is logarithmic, making it the correct choice with logarithmic Big O run-time complexity.

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Step-by-step explanation:

-6 + 2

= -4

According to question

you need to add.

Answer:

should be 1

Step-by-step explanation:

its constant meaning its an exact slope

and it runs through intersections every 1-1

so the answer is 1 because 1 over 1 in a fraction is still 1

the slope is positive because as you move to the right, the graph goes up

the slope is rise/run = 3/3 = 1

the slope of the line is 1

hope this helps!

A normal distribution of a random variable cannot be described (D) by a graph that is centered on the mean.

A continuous probability distribution for a real-valued random variable in statistics is known as a normal distribution or Gaussian distribution.

Since all three of these variables are equal in a normal distribution, they serve as the center of the graph and can either be zero or not.

An example of a continuous probability distribution is the normal distribution, in which the majority of data points cluster in the middle of the range while the remaining ones taper off symmetrically toward either extreme.

The distribution's mean is another name for the center of the range.

Therefore, a normal distribution of a random variable cannot be described (D) by a graph that is centered on the mean.

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Answer:

-8

Step-by-step explanation

\(x-4=-12\\x-4+4=-12+4\\x=-8\)

Answer:

x =6t

y = - 5t

Answer:

The answer should be 18.06 but I don't see that as a choice

Answer:

7

Step-by-step explanation:

have a good day !!!!!!!!!

The smallest positive integer n for which n^2 is divisible by 18 and n^3 is divisible by 640 is 120

The modulo (or "modulus" or "mod") is the remainder after dividing one number by another.

The smallest integer is 120, since:

\(120^{2}\) mod 18 = 0, (reminder after dividing \(120^{2}\) by 18 is 0) and

\(120^{3}\) mod 640 = 0 (reminder after dividing \(120^{3}\) by 18 is 0)

Hence, The smallest positive integer n for which n^2 is divisible by 18 and n^3 is divisible by 640 is 120.

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Answer:

h = 10 ft

Step-by-step explanation:

The area (A) of a triangle is calculated as

A = \(\frac{1}{2}\) bh

Here A = 75 and b = 15, thus

\(\frac{1}{2}\) × 15h = 75 ( multiply both sides by 2 to clear the fraction )

15h = 150 ( divide both sides by 15 )

h = 10

Answer:

y = 2*x + 4

Step-by-step explanation:

We know that a linear function can be written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

We know that if this line passes through the points (x₁, y₁) and (x₂, y₂) the slope can be written as:

a = (y₂ - y₁)/(x₂ - x₁)

So, here we know that our line must pass through the points (-2,0) and (0, 4)

Then the slope of this line is:

a = (4 - 0)/(0 - (-2))

a = 4/2 = 2

Then our line is something like:

y = 2*x + b

Now, to find the value of b we can use one of these two points, for example if we use the point (-2, 0), we know that, when x = -2, we must have y = 0.

0 = 2*(-2) + b

0 = -4 + b

4 = b

Then the equation for our line is:

y = 2*x + 4

Given Data:

The salary of Clarissa is : $395 per week

The total amount Clarissa own the employment agency is 20% of the 4 weeks salery.

The total salary of employment agency in four week is,

Clarissa earn $1580 in her first four week.

The 20% of the $1580 is the amount Clarissa owns the agency.

The 20% of the $1580 is,

Thus, Clarissa has to pay $316 to the employment agency.

The number of permutations of {a, b, c, d, e, f} that have b between a and c is 120. To determine the number of permutations, we need to consider the positions of a, b, and c in the sequence.

Since b must be between a and c, there are three possible positions for b: either it comes after a and before c (abc), after c (acb), or before a (bac).

Once the positions of a, b, and c are fixed, the remaining three letters (d, e, f) can be arranged in any order. Since there are 3! = 6 ways to arrange the remaining three letters, the total number of permutations with b between a and c is 3 * 6 = 18.

However, for each of the three arrangements (abc, acb, bac), the remaining three letters (d, e, f) can be arranged in 3! = 6 different ways. Therefore, the total number of permutations is 3 * 6 = 18 * 6 = 120.

Hence, there are 120 permutations of {a, b, c, d, e, f} that have b between a and c, such as dfaebc and cbaedf.

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ANSWER:

13.35 hours

EXPLANATION:

Given:

Time Kristen takes to harvest = 10.2 hours

Time Kayla takes to harvest = 16. 5 hours

Let X represent the time it would take them to work together.

Here, to find the time it would take them if they worked together, let's find their mean time, using the formula below:

It would take them 13.35 hours if they worked together.

Answer:

\(17x-23=1/2\times81\)

\(17x-23=40.5\)

\(17x=40.5+23\)

\(17x=63.5\)

\(x=63.5/17\)

\(x=3.73\)

OAmalOHopeO

Of these three examples, height and weight are more likely to be normally distributed.

What is continuous variable ?

A continuous variable is a type of quantitative variable that can take on any value within a certain range. Continuous variables can be measured to any degree of precision, meaning they can be broken down into smaller and smaller increments.

Three real-life examples of a continuous variable are:

Height: Height is a continuous variable that can take any value within a certain range. It can be measured to any degree of precision, making it a continuous variable.

Time: Time is another continuous variable that can be measured to any degree of precision, from milliseconds to years.

Weight: Weight is also a continuous variable that can take any value within a certain range. It can be measured to any degree of precision, making it a continuous variable.

This is because these variables tend to follow a bell-shaped curve when plotted, with most values clustering around the mean and fewer values appearing further away from the mean. Time, on the other hand, may not be normally distributed because it can have different distributions depending on the situation, such as a bimodal distribution for the time of day people go to sleep or wake up. However, it's important to note that the normal distribution is just one of many possible distributions for continuous variables and may not always be the most appropriate or accurate for real-life situations.

Therefore, Of these three examples, height and weight are more likely to be normally distributed.

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Answer:

7.5

Step-by-step explanation:

90÷12 = 7.5.

The division is one of the basic arithmetic operations in math in which a larger number is broken down into smaller groups having the same number of items. Division is the reciprocal of multiplication.

90 divided by 12,

on dividing 90 by 12 we get,

7.5 as quotient and 6 as remainder.

Quotient is the number of times a division is completed fully, while the remainder is the amount left that

Hence, 90÷12 = 7.5.

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Answer:

1/2

Step-by-step explanation: