Another teacher decides to average the height of all 15-year-old male students in his classes throughout the day. By the end of the day, he measured the height of 57 boys and calculated an average of 68.1 inches. The known mean height for 15-year-old boys is 67 inches, with a standard deviation of 3.19 inches. What is the percentile rank for this sample? (enter a number only, rounded to the nearest 2 decimal places)
Answer: 0.47
Step-by-step explanation:
0.47% = 0.0047 in decimal form. Percent means 'per 57'. So, 67Inches means 0.47 per 100 or simply 0.47/100. If you divide 0.47 by 100, you'll get 0.0047 (a decimal number).
Write an
equation of the line with a slope of -3 and y-intercept of 0.
I need help!!!!
Madison says her pet cat weighs about 8 ounces. Her brother Phillip says the cat weighs about 8 pounds. Whose estimate is more accurate? Use benchmarks to explain your answer.
Answer:
8 Pounds
Step-by-step explanation:
A cat that weighs 8 oz would be half of a pound, and that seems highly inaccurate. Most cats on average in the U.S. weigh 8 pounds, therefore that is your answer.
please help fill in these blanks
Answer:
1) 2
2)30
3)10
-Sumin <3
Triangle M N O is shown. Angle O N M is a right angle. Angle N O M is 40 degrees and angle L M N is 50 degrees.
Given right triangle MNO, which represents the value of cos(M)?
StartFraction O N Over M N EndFraction
StartFraction M N Over M O EndFraction
StartFraction O N Over M O EndFraction
StartFraction M N Over O N EndFraction
Given:
In triangle MNO, angle ONM is a right angle. Angle NOM is 40 degrees and angle LMN is 50 degrees.
To find:
The value of cos(M).
Solution:
In a right angle triangle,
[tex]\cos \theta=\dfrac{Base}{Hypotenuse}[/tex]
Draw a diagram using the given information.
In triangle MNO, angle ONM is a right angle so its opposite side MO is the hypotenuse. For vertex M, MN is the base of the triangle. So,
[tex]\cos (M)=\dfrac{MN}{MO}[/tex]
Therefore, the correct option is B.
Answer:
it is b
Step-by-step explanation:
Dora and boots are decorating cupcakes for a bake sale. Dora already has 25 cupcakes decorated and can decorate 10 cupcakes per hour. Boots has no cupcakes decorated yet but can decorate 15 cupcakes per hour. When will Dora and boots have the same number of cupcakes decorated and how many will they have
Answer: after 5 hours, 75 cupcakes
Step-by-step explanation:
What is the constant of proplity?
O 0.75
O 0.8
01.25
O 1.5
There are 37 oak Trees Correctly in the park park workers will Plant 27 more oak Trees today how many oak Trees will The park have when The workers are finished
Answer:
64
Step-by-step explanation:
37+27=64
Evaluate the expression 2y + 3.5. Evaluate the expression for y=1.8, y=4, y=6.9. (there should be three answers)
Answer:
1. 7.1
2. 11.5
3. 24.2
Step-by-step explanation:
you use P.E.M.D.A.S. for all the equations.
so you do thr multiplication and then the addition
1. 2(1.8)+3.5= 3.6+3.5= 7.1
2. 2(4)+3.5= 8+3.5=11.5
3.2(6.9)+3.5= 13.8+3.5= 24.2
hope this helps
Standardized tests: In a particular year, the mean score on the ACT test was and the standard deviation was . The mean score on the SAT mathematics test was and the standard deviation was . The distributions of both scores were approximately bell-shaped. Round the answers to at least two decimal places. Part: 0 / 40 of 4 Parts Complete Part 1 of 4 Your Answer is incorrect (a) Find the -score for an ACT score of . The -score for an ACT score of is
Complete question :
Standardized tests: In a particular year, the mean score on the ACT test was 19.3 and the standard deviation was 5.3. The mean score on the SAT mathematics test was 532 and the standard deviation was 128. The distributions of both scores were approximately bell-shaped. Round the answers to at least two decimal places. Part: 0/4 Part 1 of 4 (a) Find the z-score for an ACT score of 26. The Z-score for an ACT score of 26 is
Answer:
1.26
Step-by-step explanation:
Given that:
For ACT:
Mean score, m = 19.3
Standard deviation, s = 5.3
Zscore for ACT score of 26;
Using the Zscore formula :
(x - mean) / standard deviation
x = 26
Zscore :
(26 - 19.3) / 5.3
= 6.7 / 5.3
= 1.2641509
= 1.26
URGENT Erin is taking part in a play at the community theater. The cast and crew ordered T-shirts for all the volunteers. The cost of a T-shirt is $8, and the total delivery charge is $45 per order. If the center has no more than $325 to buy T-shirts, how many T-shirts can they buy?
Answer:
B is the correct answer. Less than or equal to 35 t shirts orders.
Step-by-step explanation:
Select the correct answer.
Which expression is equivalent to sin^2x-sinx-2/sinx-2?
Answer:
A
Step-by-step explanation:
We are given:
[tex]\displaystyle \frac{\sin^2(x)-\sin(x)-2}{\sin(x)-2}[/tex]
To make it simpler and more clear, we can let u = sin(x). So:
[tex]\displaystyle \frac{u^2-u-2}{u-2}[/tex]
Now, it becomes obvious that we can factor, which produces:
[tex]\displaystyle =\frac{(u-2)(u+1)}{u-2}[/tex]
Cancel:
[tex]=u+1[/tex]
And substituting back:
[tex]=\sin(x)+1[/tex]
Hence, our answer is A.
Answer:
A
Step-by-step explanation:
Helppppp and you get some sweet candyyyy
Kelly is given the following word problem:
Gina runs 5 miles on Saturday and 6 miles on Sunday. How many miles does she run total?
Kelly’s answer is 11. What did Kelly do wrong?
A
She added 5 and 6 instead of multiplying.
B
She subtracted 5 from 6 instead of adding.
C
She didn’t ignore the extra information.
D
She didn’t include units in her answer.
Answer:
your answer is c l hipe this helps u
Answer:
d
Step-by-step explanation:
aint no way in hell its not 11
Perimeter = 16x + 8
The length of the indicated side is
Answer:
d
Step-by-step explanation:
Because you need to substitute the variable first, multiply that and add 8.
1. Write an equation of a function with each domain:
a. [2,)
b. (-0, 0)
C. (2, 0 )
What is the value of y?
y =
Help needed for this Que’s please.!
Step-by-step explanation:
step 1. the sale is 20% off; that means times 0.8.
step 2. the additional coupon is 10% off of the sale price; that means times 0.9.
step 3. so the final price is (0.8)(0.9) times the retail price
step 4. (0.8)(0.9) = 0.72 or a 28% discount and not 30%.
What is the slope-intercept form of the line that passes through (2,7) and (4, -1)?
y = -4x + 15
y = -4x + 12
y = -4x + 30
y = -4x + 3
Answer:
y=-4x+15
Step-by-step explanation:
Write the number 255% as a fraction in simplest form.
Answer:
51/200.
Step-by-step explanation:
hope this helps
Answer:
51/20 or 2 11/20
Step-by-step explanation:
We know that percentages are fractions out of 100, so, our original fraction would be:
255/100
both of these numbers can be divided by 5, so:
255 ÷ 5 = 51
100 ÷ 5 = 20
51/20
This can also be turned into a mixed number, so:
2 11/20
I want to know if I’m right?
Answer:
Yes because length x with x height, which equals 90
Step-by-step explanation:
Write
13/8
as a mixed number,
Answer:
1 5/8
Step-by-step explanation:
Answer:
1 and 5/8
Step-by-step explanation:
hdhdbfhfhfvvfvfvfhd
what is the missing angle
Answer:
x=59deg
Step-by-step explanation:
We will use tangent to find the angle because we do not know the length of the hypotenuse.
Tan(x)=opp/adj
Tan(x)=30/18
Tan(x)~59
So the last option is correct. 59deg
PLEASE HELP?!?!?!
This graph shows how fast a commuter train travels on its route in an urban area. What is the meaning of the point with and x-coordinate of 2?
a. In 1 second, the commuter train travels 2 feet.
b. it takes the commuter train 60 seconds to go ten feet.
c. In 2 seconds, the commuter train train travels 120 feet.
d. the commuter train travels 2 feet in 120 seconds
Answer:
c. In 2 seconds, the commuter train travels 120 feet.
Step-by-step explanation:
Given
The attached graph
Required
What does x-coordinate of 2 represents
Represent this coordinate with (x,y)
From the graph:
[tex]x = 2[/tex] when [tex]y = 120[/tex]
Note that:
x = time and y = distance
So:
[tex](x,y) = (2,120)[/tex]
Which means:
At 2 seconds, the train has travelled a distance of 120ft
From the list of options, (c) is correct
C) C is correct
Step-by-step explanation:
Cesar is 53 5/6 inches tall. Karina is 1 1/3 inches taller than Cesar and Jane is 1 1/4 inches taller than Karina. How tall is Jane?
Answer:
56 5/12 inches tall
Step-by-step explanation:
add karina and Janes inches together than add Cesar and then theres the height
Negative thirteen decreased by 3 times a number
Answer:
-13-x(3)
Step-by-step explanation:
Hope this helps :)
The expression in the mathematical form will be 3x + 13.
What is Algebra?The analysis of mathematical representations is algebra, and the handling of those symbols is logic.
PEMDAS rule means for the Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to solve the equation in a proper and correct manner.
Negative thirteen decreased by 3 times a number. Then the expression in the mathematical form is given as,
Let x be the number. Then the expression will be
⇒ 3x - (-13)
⇒ 3x + 13
The expression in the mathematical form will be 3x + 13.
More about the Algebra link is given below.
https://brainly.com/question/953809
#SPJ2
-7 1/3 divided by 4 1/4 in mixed number.
Answer:
1 37/51
Step-by-step explanation:
Your answer
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2
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Is the answer 2?
Answer:
yes 2 is the answer yes yes yes yes
The number of solutions 2x+3y=4, x-y=3, 3x+5y=6 is
Answer:
one solution
Step-by-step explanation:
The number of solutions 2x+3y=4, x-y=3, 3x+5y=6 is
Solving two of the equations simultaneously
2x+3y=4, ... 1 *1
x-y=3 ... 2 * 2
_________
2x+3y = 4
2x-2y = 6
subtract
3y+2y = 4+6
5y = 10
y = 10/5
y = 2
Recall that x - y = 3
x - 2 = 3
x = 3+2
x = 5
Hence the solution has just one solution
97.28 ÷ 19
PLEASE HELP PLEASE PLEASE HURRY HELP ME PLEASE
Answer:
5.12
Step-by-step explanation:
A collector has 2792 coins
altogether. Half of the coins
are on display. The collector
buys more coins at an auction
so that the coins on display
are now 40% of the collection.
How many coins are bought at
the auction?
Answer:
3490 coins
Step-by-step explanation:
Given data
Total coins= 2792 coins
Half of the coins are on display
that is 50% are on display
=2792/2
=1396
let the coins bought be x
40% of x= 1396
40/100*x= 1396
0.4x= 1396
x= 1396/0.4
x=3490
Hence 3490 coins were bought
