A national achievement test is administered annually to 3rd graders. the test has a mean score of 100 and a standard deviation of 15. if jane's z-score is 1.20, what was her score on the test?

True.

4x-3=19

4x=21 (add 3)

x=5.25 (divide both sides by 4)

Answer:

Open

Step-by-step explanation:

i just took the quick check

trust me

Answer:

(0, –2); maximum

Step-by-step explanation:

[tex]y = -x^2 - 2[/tex]

WE are given with the quadratic equation.

Vertex form of quadratic equation is in the form of [tex]y=a(x-h)^2+k[/tex]

where (h,k) is the vertex

[tex]y = -(x-0)^2 - 2[/tex]

The value of a=-1

when the value of 'a' is negative, then the vertex is maximum

To find the vertex we look at the value of h  and k

h=0 and k= -2

Vertex is (0,-2)

(0, –2); maximum

Final answer:

To calculate the fraction of a 10-hour shift that 6 hours represents, you divide 6 by 10 and simplify the resulting fraction, which is 6/10, to 3/5. Therefore, 6 hours is 3/5 of the work shift.

Explanation:

If an employee works a 10-hour shift, and you want to find out what fraction of the shift is represented by 6 hours, you divide 6 by the total hours in the shift which is 10. So, we write this as the fraction 6/10.

Now, simplifying the fraction, both the numerator (6) and the denominator (10) can be divided by 2. This gives us 3/5. Therefore, 6 hours represent 3/5 of the employee's 10-hour work shift.

To relate this to a concept you might already be familiar with, consider that 60 minutes make up 1 hour. If we write this as a ratio, it would be 60 minutes / 60 minutes, which simplifies to 1. Similarly, when we talk about fractions of an hour, like in the question, we're essentially looking for the number of parts of the shift that are being taken up by 6 hours in a 10-hour slot, which is 3/5.

Answer: 80x130

Step-by-step explanation:

divide 36 by 8

36 / 8 = 4.5

 so he had 4 pieces that were 8 feet long and he had 1 piece 4 feet long

 so he had 5 pieces of wire

To find out how much shorter Noam's walk would be if there were a direct path from the school to his house, we need to calculate the displacement using the Pythagorean theorem. Noam walks 8 blocks north and then 6 blocks east. The displacement is the straight-line distance from the starting point to the endpoint. Therefore, the displacement is the square root of (8² + 6²), which is the square root of 64 + 36, which is the square root of 100, which is 10 blocks. So, if there was a direct path, Noam's walk would be 10 blocks shorter.

To find out how much shorter Noam's walk would be if there were a direct path from the school to his house, we need to calculate the displacement using the Pythagorean theorem. Noam walks 8 blocks north and then 6 blocks east. The displacement is the straight-line distance from the starting point to the endpoint.

The Pythagorean theorem states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Therefore, the displacement is the square root of (8² + 6²), which is the square root of 64 + 36, which is the square root of 100, which is 10 blocks. So, if there was a direct path, Noam's walk would be 10 blocks shorter.

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The inverse function of f(x) = 6x^4 is f^(-1)(x) = (x/6)^(1/4), and f^(-1)(x) is a function.

To find the inverse function of f(x) = 6x^4, we can follow these steps:

1. Replace f(x) with y:
y = 6x^4

2. Swap x and y:
x = 6y^4

3. Solve for y:
Divide both sides by 6:
x/6 = y^4

4. Take the fourth root of both sides:
(x/6)^(1/4) = y

Now we have found the inverse function:
f^(-1)(x) = (x/6)^(1/4)

To determine if f^(-1)(x) is a function, we need to check if it passes the vertical line test. The vertical line test states that if a vertical line intersects a graph in more than one point, then the graph is not a function.

Let's imagine graphing f^(-1)(x) = (x/6)^(1/4). We see that for every x-value, there is only one corresponding y-value. Hence, each vertical line will intersect the graph at most once, confirming that f^(-1)(x) is indeed a function.

In conclusion, the inverse function of f(x) = 6x^4 is f^(-1)(x) = (x/6)^(1/4), and f^(-1)(x) is a function.

Kelvin found the correct equation and solution.

Brittany write incorrect equation because difference of a number and 20 can be written as, x - 20 where, x is a number; but Brittany can be written as 20 - x.

Here,

Kevin and Brittany write an equation to represent the following relationship, and both students solve their equation.

And, condition is given as,

5 times the difference of a number and 20 is the same as half the sum of 4 more than 4 times a number.

What is linear equation?

A linear equation only has one or two variables. No variable in a linear equation is raised to a power greater than 1.

Now, according to given condition,

5 times the difference of a number and 20 is written as,

[tex]5 ( x - 20 )[/tex]

And, half the sum of 4 more than 4 times a number, is written as

[tex]\frac{1}{2} ( 4x + 4)[/tex]

Now, both equation are equal

[tex]5 ( x - 20 ) = \frac{1}{2} ( 4x + 4)\\5x - 100 = 2x + 2\\3x = 102\\x = 34[/tex]

Hence, Kelvin found the correct equation and solution.

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12  x 10  = 120

12   X 100  = 1200

Take for instance in 6 x 2, 6 x 20 and 6 x 200. Find the factors and these are the computations. We can also say: 

6 x 20 = 6 x 2 x 10 = 12 x 10 = 120 
60 x 20 = 6 x 10 x 2 x 10 = 12 x 10 x 10 = 1200

It must be remembered that in the commutative and associative properties of multiplication, the order of the factors does not matter when solving this kind of problem

Answer:

1

Step-by-step explanation:

[tex]27 \cdot ((3^3)^{-1})[/tex]

We need to evaluate the given expression

3^3 is 3 times 3 times 3= 27

[tex]27 \cdot ((3^3)^{-1})[/tex]

[tex]27 \cdot ((27)^{-1})[/tex]

Now we apply exponential property

[tex]a^{-m}= \frac{1}{a^m}[/tex]

[tex]27^{-1}= \frac{1}{27}[/tex]

[tex]27 \cdot ((27)^{-1})[/tex]

[tex]27 \cdot \frac{1}{27}=1[/tex]

Michael made 48 cookies and is bringing 75% of them to a school party. To calculate this, multiply 48 (the total number of cookies) by 0.75, resulting in 36 cookies that he will bring to school.

Michael made 4 dozen chocolate chip cookies. He wants to bring 75% of them to school for a party. To find out how many cookies he will bring, we need to calculate 75% of 4 dozen cookies. Since each dozen is 12 cookies, 4 dozen would be 4 times 12, which equals to 48 cookies.

To find 75% of 48, you can either multiply 48 by 0.75 or calculate 75/100 of 48:

Therefore, Michael will bring 36 cookies to the school for the party.

Michael brings 36 cookies to school for the party.

To find out how many cookies Michael brings to school, we need to calculate 75% of the total number of cookies he made.

Michael made 4 dozen cookies, and a dozen is equal to 12, so he made a total of 4 x 12 = 48 cookies.

75% of 48 is calculated by multiplying 48 by 0.75. 48 x 0.75 = 36.

Therefore, Michael brings 36 cookies to school for the party.

Jupiter, the Roman king of the gods, has no mythical records signifying that he had a pet dog. He is mostly associated with the eagle and the bull.

Jupiter, the Roman king of the gods, The question you're asking seems to be based on the mythology of the Roman god Jupiter. However, there is no record in Roman mythology of any pet dog belonging to Jupiter. Jupiter, also known as Jove, was the king of the gods and the god of the sky and thunder in Ancient Rome. Animals often associated with him are the eagle and the bull, but not a dog.

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∠1 and ∠2 are right angles

What are Congruent Triangles?

Transformations change the size or position of shapes. Congruent shapes are identical, but may be reflected, rotated or translated. Scale factors can increase or decrease the size of a shape. Congruent Triangles simply mean the triangles that possess the same size and shape

•  The three sides are equal (SSS: side, side, side)

•  Two angles are the same and a corresponding side is the same (ASA: angle, side, angle)

•  Two sides are equal and the angle between the two sides is equal (SAS: side, angle, side)

•  A right angle, the hypotenuse and a corresponding side are equal (RHS, right angle, hypotenuse, side)

Given data ,

∠1 and ∠2 are supplementary

So , ∠1  + ∠2 = 180°

∠1 ≅ ∠2

So , ∠1 and ∠2 are congruent

Since , we know that both of these angles are congruent and supplementary , both of the angles add up to 180°

So , each of the angle measures a total of ∠1 = 180° / 2

                                                                           = 90°

And ∠2 = 90°

When the angle of a triangle is 90° , the angle is known as right angle

So ∠1  and ∠2 are right angles

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The square root of 7 is an irrational number because it cannot be expressed as a ratio of two integers and its decimal form is infinite and non-repeating.

The square root of 7 is indeed an irrational number. An irrational number is one that cannot be expressed as the ratio of two integers, or as a predictable or repeating decimal. Unlike the square roots of perfect squares like 4 or 25, which are 2 and 5 respectively, the square root of 7 does not result in a whole number or a rational fraction. Additionally, this number cannot be exactly represented by a finite or repeating decimal sequence, which means it continues infinitely without repetition.

When we use a calculator to determine the square root of 7, we might see a value such as 2.646, but this is only an approximation because the actual decimal expansion goes on infinitely without repeating. Furthermore, the square root of a number like 7 does not solve a polynomial with rational coefficients, which further proves its irrationality.

Rational numbers, on the other hand, include integers and fractions where the numerator and the denominator are both integers. Numbers like 2/3 are rational because they have a clear ratio. However, roots of numbers that are not perfect squares, such as √7, cannot be expressed in such a ratio and are therefore irrational.

x = -4, so use the first equation, x^2 = -4^2 = -16

x = 4, use 3rd equation, sqrt(x) = sqrt(4) = 2

greg score = x

 kara score = 3/4x-1

x + 3/4x-1 = 153

1 3/4x -1 = 153

1 3/4x = 154

x = 154 / 1 3/4 = 88

gregs score was 88

 kara s score was 153 -88 = 65