Doug's teacher told him that the standardized score (z-score) for his mathematics
exam, as compared to the exam scores of other students in the course, is 1.20.
Which of the following is the best interpretation of this standardized score? (4
points)
1) Doug's test score is 120.
2)
Doug's test score is 1.20 times the average test score of students in the
course.
3) Doug's test score is 1.20 above the average test score of students in the
course.
O 4) Doug's test score is 1.20 standard deviations above the average test score of
students in the course.
5) None of the above gives the correct interpretation.

Answer:

1,860

Step-by-step explanation:

FIRST:

we divide 124 by 4 because in 4 minutes he can type 124 words, and we need to figure out how many he can type in a minute.

124 divided by 4 is 31. (they can type 31 wpm)

NEXT: now we know they can type 31 wpm, we need to multiply that number by 60 because there are 60 minutes in an hour.

31 x 60 = 1,860

therefore, they can type 1860 words per hour

hope i helped have a great day/night! :'')

Answer:

CB = 13.75

Step-by-step explanation:

Since we know that A, B, and C are the midpoint of the sides, we know that line CB is proportional to QR (by 2)..

So, 27.5/2 = 13.75

Answer:

I am sorry. To answer a test is against the Honor Code, I cannot help you.

Step-by-step explanation:

Remember PEMDAS :)

Answer:

2.125

Step-by-step explanation:

Answer:

y = 1

Step-by-step explanation:

Given

7 + y = 5(2y - 1) + 3y ← distribute and simplify right side

7 + y = 10y - 5 + 3y

7 + y = 13y - 5 ( subtract y from both sides )

7 = 12y - 5 ( add 5 to both sides )

12 = 12y ( divide both sides by 12 )

1 = y

Answer:

He took 5 swimming classes.

Step-by-step explanation:

The problem states that the student paid a total of $56.25 for the classes and also the one-time registration fee. To find the number of classes, we should first subtract the one-time registration fee from the total.

$56.25 - $12.50 = $43.75

Now that we know he spent a total of $43.75 on the classes without the registration fee, we can divide that number by the cost of one class ($8.75) to calculate the total number of classes he took.

43.75 / 8.75 = 5

Answer:

3/4

Step-by-step explanation:

6/8 = 3/4

Answer:

c is the answer

Step-by-step explanation:

Answer:

7.4%

Step-by-step explanation:

Given parameters:

Population of Latvia in 1989 = 2700000

Population of Latvia in 1994  = 2500000

Unknown:

Percentage decrease in population  = ?

Solution:

The change in population;

  Change in population = 2700000-2500000 = 200000

Percentage decrease  = [tex]\frac{Population change }{Population in 1989} x 100[/tex]

Percentage decrease  = [tex]\frac{200000}{2700000}[/tex] x 100 = 7.4% decrease

Answer:

y + 2.4 ≤ 35

Step-by-step explanation:

Less than or equal to sign is ≤

The sentence can be represented by the inequality:

y + 2.4 ≤ 35

Subtract 2.4 from both sides

y + 2.4 - 2.4 ≤ 35 -2.4

y ≤ 35 - 2.4

y ≤ 32.6

Therefore, y is less than or equal to 32.6

Answer:

X-Intercept= (1.5,0)

Y-Intercept= (0,-3)

Step-by-step explanation:

Answer x=63

Step-by-step explanation:

1. 8a+24

2. .12e

ill edit it when get the other answers

Brainiest? pls

Answer:

D is the answer (31.05)

Step-by-step explanation:

2.07×15 is 31.05

Answer:

Step-by-step explanation:

None of these are correct. Is the equation 6x^6+12x+5 correct?

Answer:

142

Step-by-step explanation:

hope this helps!

Answer:

i dont understand what u want us to do like?

9514 1404 393

Answer:

Step-by-step explanation:

Here's the "pencil and paper" solution:

  The two altitude equations are ...

They can be solved by setting the expressions for y equal to each other.

  2800x = 41300 -3100x

  5900x = 41300

  x = 41300/5900 = 7

  y = 2800·7 = 19600

The planes will both be at 19,600 feet after 7 minutes.

_____

Attached are solutions from a graphing calculator, and from a calculator app that is able to solve systems of equations.

I find the graphing calculator the easiest to use. I can enter equations using a keyboard, and the solution is displayed in a form that can be copied and pasted.

The calculator app on my phone requires equation entry using a small on-screen keyboard, with multiple key hits required to access some functions. (y is obtained by hitting the x key twice, for example.)

The "pencil and paper" solution is not so difficult, but requires a certain amount of writing (or good short-term memory). The solutions for x and y require separate calculations, whereas the other methods give both x and y at the same time.

Answer:

1990

Step-by-step explanation:

Since the mother was 50 years old in 2000, she was 50 - (2000-1974) = 50 - 26 = 24 years old in 1974.

Hence, the daughter was 24/6 = 4 years old in 1974.

In "x" years after 1974, the daughter will be 4+x years old, while the mother will be 24+x years old.

We need to find "x" from the equation

2(4 + x) = 24+x.

8 + 2x = 24 + x,

x = 24 - 8 = 16.

1974 + 16 = 1990.

Answer In 1990 the mother doubles her daughter's age

Check In 1990 mother's age is/was 24 + 16 = 40 years.

In 1990 the daughter's age is/was 4 + 16 = 20 years.

Answer:

That would be -14.

Step-by-step explanation:

Answer:

it's -14 when u evaluate a-2x

Answer:

please correct your question

Answer:

it will take her 90000 seconds to complete 3000 piece of puzzle

Step-by-step explanation:

every 30 seconds, a correct puzzle piece , meaning 1 piece

how long would it take her to complete a 3000 piece puzzle

so let x = how long it would take her to complete a 3000 piece puzzle

so if 30 seconds = 1 piece

x seconds = 3000 piece

x = 90000 seconds

Answer:

7xy + 2x²t

Explanation:

5xy - x²t + 2xy + 3x²t

= (5xy + 2xy) + (3x²t - x²t)

= 7xy + 2x²t

Answer:

1. (x + 3) , (x + 4)

2. (x + 5) , (x - 2)

Step-by-step explanation:

1) ( x + 3 ) ( x + 4 )

2) ( x - 2 ) ( x + 5)

hope this helps

Answer:

# of 5 dollar bills: 9

# of 1 dollar bills: 6

Step-by-step explanation:

9•5 = 45

1•6 = 6

To Check: 45 + 6=51

whats the question

?

Answer:

r = 5                                

Step-by-step explanation:

l

Answer:

r = 5

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

−3(4r−8)=−36

(−3)(4r)+(−3)(−8)=−36(Distribute)

−12r+24=−36

Step 2: Subtract 24 from both sides.

−12r+24−24=−36−24

−12r=−60

Step 3: Divide both sides by -12.

−12r  =  −60  

-12      -12

r=5

Hope this helped!  :)

Have great day!

Answer:

x = 20

Step-by-step explanation:

These two angles are equal:

5x + 7 = 6x - 13

    Subtract 5x from both sides.

7 = x - 13

     Add 13 to both sides.

20 = x

I hope this was helpful to you! If it was, please consider rating, pressing thanks, and marking my answer as 'Brainliest.' It would help a lot. Have a wonderful day.

Answer:b,e,f

Step-by-step explanation:

The correct equations are:

B) 0.4 = 2/5

D) 0.7 = 7/9

E) 0.83 = 5/6

To determine which of the following equations is correct, we need to compare each decimal value to its equivalent fraction. Here are the correct equations:

B) 0.4 = 2/5

D) 0.7 = 7/9

E) 0.83 = 5/6

B) 0.4 is equivalent to 2/5 because 0.4 means 4 tenths, and 2/5 also represents 4 tenths (2 parts out of 5).

D) 0.7 is equivalent to 7/9 because 0.7 means 7 tenths, and 7/9 also represents 7 tenths (7 parts out of 9).

E) 0.83 is equivalent to 5/6 because 0.83 means 83 hundredths, and 5/6 also represents 83 hundredths (5 parts out of 6).

The remaining options (A, C, and F) are not correct as their decimal values do not match their corresponding fractions.

To know more about equations:

https://brainly.com/question/33622350

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