Pls help I will mark brainliest

Answer:  B. 12

Step-by-step explanation:

f(x) = 3x2 – 7x + 2

f(- 1) = ?

f(-1)=3(-1)^2-7(-1)+2

     =3(1)+7+2

     =3+7+2

      =12

Answer:

85

Step-by-step explanation:

you add 38 and 47 together and you get 85

Answer:

Ten Ten

Step-by-step explanation:

Answer:

5) x = -1

6) x = 2

Step-by-step explanation:

5) 5 + 2x + 6 = x + 10

   2x + 11 = x + 10

   2x + 1 = x

   1 = -x

   -1 = x

6) (9x + 7) + (-3x + 20) = 39

    6x + 27 = 39

    6x = 12

     x = 2

Answer:

For question 5, x= -1

Step-by-step explanation:

Segment Addition Postulate = ab+bc=ac

For Question 5,

(a)     +    (b)  = (c)  

5+2x  +   6    = x+10

5+2x+6=x+10

To solve that,

5+2x+6=x+10

Add 5+6

11+2x=x+10

Subtract 11 from both sides

2x= x-1

x-1=2x

The answer is in the image attached below. Sorry for the goofy looking arrow.

The coordinate of the midpoint of the segment with the given endpoints is ( 1/2, -6 ).

The midpoint formular used in finding the midpoint of a segment is expressed as;

( [x₁+x₂]/2 , [y₁+y₂]/2 )

Given the data in the question;

Point V(-2,5)

Point Z(3,-17)

Plug these values into the equation above.

( [x₁+x₂]/2 , [y₁+y₂]/2 )

( [(-2) + 3]/2 , [5 + (-17)]/2 )

( 1/2 , -12/2 )

( 1/2, -6 )

The coordinate of the midpoint of the segment with the given endpoints is ( 1/2, -6 ).

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Answer:

wym?? where's the expressions or am i just dumb

Step-by-step explanation:

Answer:

what expression?

Step-by-step explanation:

Answer:

~235.8

Step-by-step explanation:

200^2 +125^2= distance traveled^2

55625= distance traveled^2

235.849528301

Answer:

Step-by-step explanation:

Let the speed of the plane be s

The speed of the plane in the same direction is

The speed of the plane against wind is

Time = distance/speed

Solving for s

The approximate area of the trapezoid is determined as  13.95 unit².

The approximate area of the trapezoid is calculated as follows;

Area = ¹/₂(b₁ + b₂)h

Where;

The y-coordinates of the points on the curve at x=3/2 and x=4 is calculated as follows;

y(3/2) = - (3/2)²/2 + 3/2 + 5

y(3/2) = -9/8 + 3/2 + 5

y(3/2) = 5.375

y(4) = -4²/2 + 4 + 5

y(4) = -8 + 9

y(4) = 1

h = 5.375 - 1 = 4.375

The approximate area of the trapezoid is calculated as;

Area = ¹/₂(5.375 + 1) x 4.375

Area = 13.95 unit²

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The answer is 59049.

Kuaaahahahahahahahah!

Answer:

The right option is option e.T-shaped.

Step-by-step explanation:

The molecular geometry or shape of clf3 is T-shaped. It acquires such shape because of presence of two lone pairs which take equatorial position and there are greater repulsions. The hybridisation is sp3d and it has 2 lone pairs

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Option e) T-shaped

The shape or molecular geometry  of ClF₃ is T-shaped. It acquires such a shape due to the presence of two lone pairs in the equatorial position and has greater repulsion. The hybrid is sp³d and it has 2 lone pairs.

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I hope this helps you

Distance between two points formula is

square root of (2-2)^2+(-1-5)^2

square root of 0+36

Distance =6=HK

Answer:

4

Step-by-step explanation:

They both have a 2 as an x coordinate, so all we have to do is find the absolute value of the difference of the y coordinates. -1-(-5) is 4, and the absolute value of 4 is still 4, so the distance is 4 units.

To solve for x, we just need to compute the inverse of A (if it exists) and multiply it by b. If A is invertible, then this method will give us the unique solution to the linear system Ax=b.

To solve a linear system of the form Ax=b using inverse matrices, we can first find the inverse of matrix A (if it exists) and then multiply both sides of the equation by \(A^-1\), giving us:

\(A^-1Ax = A^-1b\)

Since\(A^-1A\) is the identity matrix I, we can simplify the left-hand side to just x:

\(x = A^-1b\)

However, it's worth noting that computing the inverse of a matrix can be computationally expensive, particularly for large matrices.

So, while using inverse matrices can be a useful technique for solving small systems, it may not be the most efficient approach for larger systems. In those cases, other techniques such as Gaussian elimination or LU decomposition may be more appropriate.

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Answer: The answers are ll and lll.

Given

One of the zeros of 14² − 42² − 9 is the negative of the other.

To find the value of k.

Explanation:

It is given that,

One of the zeros of 14² − 42² − 9 is the negative of the other.

That implies,

Let α, -α be the zeros of the polynomial f(x) = 14² − 42² − 9.

Then,

Also,

Subtracting (1) and (2) implies,

Hence, the value of k is 0.

Answer:

1 2/3 cups of flour

Step-by-step explanation:

Nicole is cooking cookies recipe calls for 5 cups of flour she has already put in three 1/3 cups how many more cups does she need to put in?

We solve the above question using Subtraction operation

The number of cups she still needs to put in =

5 cups - 3 1/3 cups

= 5 - 3 1/3

= 5/1 - 10/3

The Lowest Common Denominator = 3

= 15 - 10/3

= 5/3

= 1 2/3 cups of flour

The law of cosine helps us to know the third side of a triangle when two sides of the triangle are already known. The value of x is 117.8°. thus, the correct option is A.

The law of cosine helps us to know the third side of a triangle when two sides of the triangle are already known the angle opposite to the third side is given. It is given by the formula,

\(Cos(\theta) = \dfrac{a^2+b^2-c^2}{2ab}\)

where

c is the third side of the triangle

a and b are the other two sides of the triangle,

and θ is the angle opposite to the third side, therefore, opposite to side c.

As per the law of cosine, the measure of angle x can be written as,

\(Cos(x) = \dfrac{12^2+5^2-15^2}{2(5)(12)}\\\\Cos(x) = \dfrac{-56}{120}\\\\x = 117.8^o\)

Hence, the value of x is 117.8°. thus, the correct option is A.

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30ft high above the ground is the lamp.

What is an angle?

An angle is a shape created by two rays that share a terminus and are referred to as the angle's sides and vertices, respectively. Angles created by two rays are in the plane where the rays are located. The meeting of two planes also creates angles. We refer to these as dihedral angles.

Here, we have

BC⊥AD and DE⊥AD

∠ABC = ∠ADE(=90°)

Also,∠A=∠A

ΔABC ΔADE (AA similarity)

AB/AD = BC/DE

40/(200 + 40) = 5ft/DE

DE = 5ft×6 = 30ft

Hence, 30ft high above the ground is the lamp.

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The expected claim size is 950 and the variance is 125000/9.

The probability that a claim is no greater than 500 is 0.8, which means the probability of a claim being greater than 500 is 0.2. The claim sizes are uniformly distributed on (0; 500] and on (500; 1500].

Therefore, the probability of a claim being in the range of (0; 500] is 0.8/2 = 0.4 and the probability of a claim being in the range of (500; 1500] is 0.2/2 = 0.1.

The expected claim size is calculated as the weighted average of the claim sizes in each range, where the weight is the probability of a claim being in that range. Thus, the expected claim size is (0.4 x 250 + 0.1 x 1000) = 950.

The variance of the claim size is calculated as the weighted average of the squared deviations from the expected claim size, where the weight is the probability of a claim being in that range. Thus, the variance is (0.4 x (250 - 950)^2 + 0.1 x (1000 - 950)^2) = 125000/9.

Therefore, the expected claim size is 950 and the variance is 125000/9.

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Answer:

8

Step-by-step explanation:

Let the number be n

6*n = 16 + 4*n

6n = 16 + 4n

6n - 4n = 16

2n = 16

2n/2 = 16/2

n = 8

The pairs of insulated socks has a unit rate of $7.99

From the question, the given parameters are

The above parameters can be represented as the following points

(x, y) = (6, 47.94)

The unit rate of the points is then calculated as

k = y/x

Substitute the known values in the above equation

So, we have the following equation

k = 47.94/6

Evaluate the quotient

So, we have

k = 7.99

Hence, the unit rate is $7.99

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Answer:

10 minutes

Step-by-step explanation:

just divide 20 by 2 to get the minutes also WHO WALKS THAT SLOW?!??!?!

We may need to consider other methods of estimation, such as maximum likelihood estimation or Bayesian estimation

To estimate the parameter θ using the method of moments, we first find the first moment of the distribution in terms of the parameter θ, and then set it equal to the sample mean. Solving for θ gives us our estimate.

For this problem, the first moment of the distribution with density Ox®-1 is:

E[X] = ∫x(Ox®-1)dx from 0 to 1

= ∫x^(2-1)dx from 0 to 1

= ∫x dx from 0 to 1

= 1/2

Setting this equal to the sample mean of the three observations X1 = 0.4, X2 = 0.7, and X3 = 0.9, we have:

1/2 = (X1 + X2 + X3)/3

Solving for the sample mean, we get:

(X1 + X2 + X3)/3 = 1/2

X1 + X2 + X3 = 3/2

Substituting the sample values, we have:

0.4 + 0.7 + 0.9 = 3/2

Simplifying, we get:

2 = 3/2

This is clearly not true, so there must be some mistake in our calculations. Checking our work, we see that the first moment of the distribution is actually undefined since the integral diverges as x approaches 1. Therefore, we cannot use the method of moments to estimate the parameter θ in this case.

We may need to consider other methods of estimation, such as maximum likelihood estimation or Bayesian estimation

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The number of simple events in this experiment is 16.

The correct answer to the given question is option c.

The probability of an event can be calculated by dividing the number of favorable outcomes by the number of possible outcomes. A simple event is one in which only one of the outcomes can occur. For example, if a coin is tossed, a simple event would be the outcome of the coin being heads or tails.

The total number of possible outcomes in the experiment of tossing 4 unbiased coins simultaneously is 2⁴, since there are two possible outcomes for each coin. Thus, the total number of possible outcomes is 16.

Each coin has two possible outcomes: heads or tails. If all four coins are flipped, there are two possible outcomes for the first coin, two possible outcomes for the second coin, two possible outcomes for the third coin, and two possible outcomes for the fourth coin. Therefore, the total number of possible outcomes is 2 × 2 × 2 × 2 = 16.

Therefore, the number of simple events in this experiment is 16, which is option (c).

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Answer:

25

Step-by-step explanation:

(-5)^2

(-5)*(-5)

25

Answer:

25

Step-by-step explanation:

(-5)^2 = 25, since -5 x -5 is 25.

Now, if the -5 hadn't been in parenthesis, -5^2 would be read as -(5 x 5), and would equal -25.

Brainliest, please! I'm so close to becoming an Expert!

Answer:

c = d/a - b

General Formulas and Concepts:

Pre-Algebra

Step-by-step explanation:

Step 1: Define

a(c + b) = d

Step 2: Solve for c

Answer:

10/3

Step-by-step explanation:

The median height of the boys aged 13 years is 160 cm.

option D.

From the given equation of line of best fit, the median height of the boys aged 13 years is calculated as follows;

The given equation for line of best fit is;

y = 6.5x + 75.5

where;

when x = 13 years, the value of y, median height, is calculated as follows;

y = 6.5 (13) + 75.5

y = 160 cm

Thus, the median height of the boys aged 13 years is determined by applying the given equation for line of best fit,

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