NEED HEP WILL GIVE BRAINLIEST IF YOU SOLVE ALL 3

Answer:

pulling a king out of a deck of cards

Step-by-step explanation:

A compound event is more than one thing happening

The only item listed that has only one thing happening is pulling a king out of a deck of cards, so that is the only one that is not a compound event

Answer:

Lena is 3 now

Sasha is  9 now

Step-by-step explanation:

L = Lenas age

S = sasha age

Now

S = L+6

In 3 years

(S+3) = 2(L+3)

Substitute the first equation into the second

( L+6+3) = 2(L+3)

Combine like terms and distribute

L+9 = 2L+6

Subtract L from each side

L+9-L = 2L -L+6

Subtract 6 from each side

9-6 =L+6-6

Lena is 3 now

Sasha is L+3 = 3+6 = 9 now

Just put -2 in,where X is and get your answer that way

Answer:

Therefore, the product of 2x+y and 5x-y+3 is 10x^2 + 13x - y^2 + 4xy + 6.

Step-by-step explanation:

Using FOIL (first, outer, inner, last) method, we can multiply the two expressions:

(2x+y)(5x-y+3) = 10x^2 - 2xy + 15x + 3y + 5xy - y^2 + 6x - 3y

Simplifying the terms by combining like terms and rearranging, we get:

10x^2 + 13x - y^2 + 4xy + 6

Answer: x^2 = 11x - 18

Step-by-step explanation:

Answer:

The reason why -2^2=-4 and (-2)^2=4 is due to the rules of mathematical operations and the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

According to the order of operations, when you have an expression with multiple operations, you must perform the operations in a specific order. Exponents come before multiplication and division, and before addition and subtraction.

So, when evaluating -2^2, you first evaluate the exponent, which is 2. However, the negative sign in front of the 2 is not part of the exponent, but rather an arithmetic operation. Therefore, the expression is equivalent to -(2^2), which is equal to -4.

On the other hand, when evaluating (-2)^2, the parentheses indicate that the negative sign is part of the base, so you must first evaluate the base, which is -2, and then apply the exponent of 2. This gives you (-2)^2 = 4.

Step-by-step explanation:

The minus in (-2)^2 is enclosed in parentheses, so it is also squared:

minus × minus = plus

And talking about this one: -2^2, the minus is not included in the parentheses, that's why we only square the number (2 in this case) and keep the minus in front of it

I hope this will help...

Point H is the ortho-center of our given triangle and option c is the correct choice.

We have been given an image of a triangle. We are asked to find the term that describes point H.

We can see that point H is the point, where, all the altitudes of our given triangle EFF are intersecting.

We know that ortho-center of a triangle is the point, where all altitudes of triangle intersect. Therefore, point H is the ortho-center of our given triangle and option c is the correct choice.

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We should add 25 both side by method of completing the square.

We have to given that;

A student is solving the problem

x² + 10x + _ = 16 + _

Now, We can completing the square as;

⇒ x² + 10x + 5² = 16 + 5²

⇒ x² + 10x + 25 = 16 + 25

⇒ (x + 5)² = 16 + 25

Hence, We should add 25 both side by method of completing the square.

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Answer:

7 - y

Step-by-step explanation:

2(x - 4) + 3x - y for x = 3

~Substitute

2(3 - 4) + 3(3) - y

~Simplify

2(-1) + 9 - y

-2 + 9 - y

7 - y

Best of Luck!

The inverse g(x) of the given relation f(x) be g(x) = {(3, 8), (1, 4), (-1, 0), (-3, -4))

An inverse function will have its input and output reversed. Set the function equal to y to use algebra to identify the function's inverse (if one exists). Swap x and y after that, and then get y in terms of x.

In essence, an inverse function reverses the effects of the original function. If f(x) instructs you to multiply by 2 and then add 1, the opposite f(x) will instruct you to take 1 away and then divide by 2. If you want to see this graphically, the function f(x) and its inverse will be reflections of the line y = x.

A function's inverse is a function that reverses the effects of another function. If x=g whenever y=f(x), then a function g is the inverse of a function f. (y). In other words, applying f and then g is equivalent to not acting at all. This can be expressed as g(f(x))=x when f and g are combined.

Therefore, the correct answer is option d) g(x) = {(3, 8), (1, 4), (-1, 0), (-3, -4)).

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Answer:

It's the last one.

Step-by-step explanation:

Edge 2020.

Answer:

n = 15

Step-by-step explanation:

the equation for inverse variation is

y = \(\frac{k}{x}\) ← k is the constant of variation

to find k use the point (5, 3 ) , that is y = 3 when x = 5 , then

3 = \(\frac{k}{5}\) ( multiply both sides by 5 )

15 = k

y = \(\frac{15}{x}\) ← equation of variation

substitute (1, n ), that is x = 1, y = n into the equation

n = \(\frac{15}{1}\) = 15

it is a polygon and it would be a decagon since there are 10 sides

Answer:

It is a polygon, hexagon.

Step-by-step explanation:

Types of polygons include: Triangle, quadrilateral, Pentagon, hexagon, heptagon, octagon, nonagon, and decagon. a hexagon has 6 sides this has 8 so it isn't a hexagon but it can be a decagon so it's the second answer.

Answer:

He can buy 3 cookies.

Step-by-step explanation:

Answer:

5.

Step-by-step explanation:

15.90 / 3.18 =

Part A: β₂ = β₁ + 10 log₁₀ (f)

Part B: Δβ = 20 log10 (d₁/d₂)

This can be solved using the concept of sound intensity.

While amplitude is the distance between a wave's resting position and its crest, sound intensity is defined as the sound power per unit area. The power carried by sound waves per unit area in a direction perpendicular to that region is known as sound intensity or acoustic intensity. The watt per square metre is the SI measure of intensity that includes sound intensity.

Part A:

β₂ - β₁ = 10 log₁₀ (I₂/I₁)

given that : I₂ = f × I₁

hence, I₂/I₁ = f

so the equation becomes:

β₂ - β₁ = 10 log₁₀ (f)

β₂ = β₁ + 10 log₁₀ (f)

Part B:

P = Power by the source

I₁= intensity at distance d1 = P/(4πd₁²)

I₂ = intensity at distance d2 = P/(4πd₂²)

Δβ = β₂ - β₁ = 10 log₁₀ (I₂/I₁)

β₂ - β₁ = 10 log₁₀ ((P/(4πd₂²))/(P/(4πd₁²)))

Δβ = 10log₁₀  ((d₁/d₂)²)

Δβ = 20log₁₀ (d₁/d₂)

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Answer:

√157

Step-by-step explanation:

Use Pythagorean theorm.

\(11^2 + 6^2 = ?^2\)

121 + 36 = ?^2

157 = ?^2

√157 = ?

Can't simplify.

Answer:

12.5 m

Step-by-step explanation:

You are given the lengths of the legs of a right triangle.

We can use the Pythagorean theorem to find the length of the hypotenuse.

a^2 + b^2 = c^2

(6 m)^2 + (11 m)^2 = c^2

36 m^2 + 121 m^2 = c^2

c^2 = 157 m^2

c = sqrt(157 m^2)

c = sqrt(157) m

Answer: 12.5 m

Answer:(7/3)x - 8/3.

Step-by-step explanation:

To simplify this expression, you need to distribute the 1/3 to the expression inside the parenthesis. This gives:

1/3(5x-8) = (1/3)*5x - (1/3)*8 = (5/3)x - (8/3)

Now, you can distribute the 2/3 to the x-term:

2/3x = (2/3)x

Putting the two terms together, you get:

(5/3)x - (8/3) + (2/3)x = (5/3 + 2/3)x - 8/3 = (7/3)x - 8/3

So, the simplified expression is (7/3)x - 8/3.

Answer:

Step-by-step explanation:

1/3(5x-8)+2/3x

multiply everything by the LCM of the denomenators

LCM of the denomenators=3

1/3 x 3=0

(5x-8)x3=15x-24

2/3x x3=2x

15x+2x-24

=17x-24

The expression √4x  using rational exponents ( 4x )^{\frac{1}{2} } .

What is rational exponents?

What is Integer Exponents?

√4x  

use \(\sqrt[n]{a^{x} } = a^{x/n}\)

to rewrite

√4x   = \(( 4x )^{\frac{1}{2} }\)

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Answer:

A.  The probability of event B​ occurring, given that event A has occurred

Step-by-step explanation:

Conditional probability

A probability is conditional if is depends on what has already happened.

The probability that event B happens, given that event A has already happened is "B given A" or P(B | A)

Therefore, P(B | A) means "The probability of event B​ occurring, given that event A has occurred"

Additional information:

P(A | B) means "A given B", i.e. the probability of event A​ occurring, given that event B has occurred

P(A ∩ B) means the probability of event A and event B both happening.

Answer:

b = 44°

Step-by-step explanation:

Opposite angles are congruent.

For a ticket buyer who pays $9 per ticket, the expected value of the raffle is $-7.17.

The expected value is the product of the probability of an event occurring and the value of the observed occurrence.

As a probability-weighted value, the expected value is computed by multiplying the sum of the values by the probability of winning.

It is the mean of a random variable.

The cost per raffle ticket = $9

The number of tickets sold = 709

The winning value = $1,300

The probability of winning the raffle by one ticket = 1/709

Therefore, the expected value is $-7.17 [($1,300 x 1/709) - $9], that.

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Answer:

20° and 70°

Step-by-step explanation:

complimentary angle sum to 90°

let x be the compliment then the angle is 3x + 10 , so

x + 3x + 10 = 90 , that is

4x + 10 = 90 ( subtract 10 from both sides )

4x = 80 ( divide both sides by 4 )

x = 20

3x + 10 = 3(20) + 10 = 60 + 10 = 70

the 2 angle measures are 20° and 70°

The circumference of the pool is 26.38 meters

The radius, r is given as:

r = 4.2

The circumference, C is calculated using:

\(C =2\pi r\)

This gives

C =2 * 3.14 * 4.2

Evaluate

C = 26.38

Hence, the circumference of the pool is 26.38 meters

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Answer:

Use the formula for direct variation, and this will help answer the last part of the question.

Step-by-step explanation:

An arithmetic sequence is a sequence in which the difference between consecutive terms is constant.

An arithmetic sequence is a linear function. Instead of y=mx+b, we write an=dn+c where d is the common difference and c is a constant (not the first term of the sequence, however).

A recursive definition, since each term is found by adding the common difference to the previous term is ak+1=ak+d.

For any term in the sequence, we've added the difference one less time than the number of the term. For example, for the first term, we haven't added the difference at all (0 times). For the second term, we've added the difference once. For the third term, we've added the difference two times.

The formula for the general term of an arithmetic sequence is: an = a1 + (n-1) d.

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When Jamie has $200 to purchase skateboard equipment, he will have spent more than 50 percent.

From the information given, the total amount spent will be:

= $100 + $60 + $30 + $20 + $20 + $50 + $115

= $395

Since Jamie has $200 to purchase skateboard equipment, the percentage will be:

= 200/395

= 0.51

= 51%

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14. The trigonometric equation (sin47°/cos43°)² + (cos43°/sin47°)² - 4cos²45° = 4

15. In the trigonometric equation 2(cos²θ - sin²θ) = 1, θ = 15°

A trigonometric equation is an equation that contains a trigonometric ration.

14. To find the value of (sin47°/cos43°)² + (cos43°/sin47°)² - 4cos²45°, we proceed as follows

Since we have the trigonometric equation (sin47°/cos43°)² + (cos43°/sin47°)² - 4cos²45°,

We know that sin47° = sin(90 - 43°) = cos43°. So, substituting this into the equation, we have that

(sin47°/cos43°)² + (cos43°/sin47°)² - 4cos²45° = (cos43°/cos43°)² + (cos43°/cos43°)² - 4cos²45°

= 1² + 1² - 4cos²45°

We know that cos45° = 1/√2. So, we have

1² + 1² - 4cos²45° = 1² + 1² - 4(1/√2)²

= 1 + 1 + 4/2

= 2 + 2

= 4

So, (sin47°/cos43°)² + (cos43°/sin47°)² - 4cos²45° = 4

15. If 2(cos²θ - sin²θ) = 1 and θ is a positive acute angle, we need to find the value of θ. We proceed as follows

Since we have the trigonometric equation 2(cos²θ - sin²θ) = 1

We know that cos2θ = cos²θ - sin²θ. so, substituting this into the equation, we have that

2(cos²θ - sin²θ) = 1

2(cos2θ) = 1

cos2θ = 1/2

Taking inverse cosine, we have that

2θ = cos⁻¹(1/2)

2θ = 30°

θ = 30°/2

θ = 15°

So, θ = 15°

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Answer:

Step-by-step explanation:

m is the dependent variable; it represents the value of a linear function of k:

m = f(k) = k + 3

30

First you divide 2.95 by .59, which is 5.

Then you multiply 6 by 5, and get 30!

Answer:

t=4.45

Step-by-step explanation:

Answer:

B. Less than 360 miles

Step-by-step explanation:

Let the number of miles driven be \(x\)

The cost of renting from Gentle Rental per week is

\(185+0.25x\)

The cost of renting from Rental Giant per week is \(275\).

Now we have to find after how many miles the cost of renting from Gentle Rental cost Carlos less than renting from Rental Giant

\(185+0.25x<275\\\Rightarrow 0.25x<275-180\\\Rightarrow x<\dfrac{90}{0.25}\\\Rightarrow x<360\)

So, the answer is less than 360 miles.