A sleep study found that the number of hours each person slept was normally
distributed. The study found that the average person slept 8.2 hours with a
standard deviation of 0.7 hours.
1. What range of hours of sleep are the 99.7% closet to the mean
Answer:
6.1-10.3
Step-by-step explanation:
Multiply standard deviation times 3 = 2.1
Subtract and add to mean.
ANSWER ASAP! WILL MARK BRAINLIEST DUE TODAY
Find the value of x.
A) 18
B) 36
C) 45
D) 50
B) 36 !
Step-by-step explanation:
Hope I helped u. :)
What is the Sector area with radius 6 and an angle of 50°? Use 3.14 for pi.
Answer:
15.7 units²
Step-by-step explanation:
The sector area is 50/360 times the area of the circle (since the central area of a complete circle is 360° and that for the sector is 50°), or
Sector area = (50/360)(3.14)(6 units)² = 15.7 units²
If p=5 and q=6, evaluate the following expression:2p+3q/4
Answer:
7
Step-by-step explanation:
Substitute in numbers : 2(5)+3(6) /4
Combine Like Terms : 10+18/4 = 28/4
Answer : 7
An orchestra has 100 musicians 4/10 of them play string instruments-violin , viola, cellodouble bass , guitar, lute, and harp. What decimal is equivalent to 4/10 ?
Which graph correctly solves the equation below?
-x² – 1 = 2x^2 – 4
Answer: Hope this helps. I didn't see any graphs posted on your question.
Step-by-step explanation:
y = -x²-1
y = 2x²-4
Edit: posted wrong screenshot :/
here is the actual one lol
Any helpers? Need help asap
Answer: positive: up down/ up up negative: down up down down
Step-by-step explanation:
If 40% of a number is 112 and 95% of the same number is 266, find 55% of that number.
Answer:
154
Step-by-step explanation:
.4 x 112 = 280
.95 x 266 = 280
.55 x 280 = 154
What is the area of the rectangle with the given dimensions? *
The dimensions of a rectangle are 2x - 5 and
3x + 3. Which expression represents the area
of the rectangle in simplest terms?
F 6x2 - 9x - 15
G 6x2 - 9x + 15
H 6x + 9x - 15
J 6x - 15x - 9
Given:
The dimensions of a rectangle are [tex]2x-5[/tex] and [tex]3x+3[/tex].
To find:
The expression that represents the area of the rectangle in simplest terms.
Solution:
Area of a rectangle is:
[tex]Area=Length\times Width[/tex]
The dimensions of a rectangle are [tex]2x-5[/tex] and [tex]3x+3[/tex]. So, the area of the given rectangle is:
[tex]Area=(2x-5)\times (3x+3)[/tex]
[tex]Area=2x(3x)+2x(3)-5(3x)-5(3)[/tex]
[tex]Area=6x^2+6x-15x-15[/tex]
[tex]Area=6x^2-9x-15[/tex]
Therefore, the correct option is F, i.e., [tex]6x^2-9x-15[/tex].
find f(3) if f(x)=-3x-6
Answer:
-3(3)-6=-15
Step-by-step explanation:
one ticket costs $8. if you have $56, how many tickets can you buy?
please show work if it’s possible!!:)
Answer:
7
Step-by-step explanation:
because 56 divided by 8 = 7
or 7 x 8 = 56
hope this helps?
if its right can i have brainlist?
:')?
Answer:
You can buy 7 tickets
Step-by-step explanation:
56 devided by 8 is 7
b. If 3x - 3 and 5x + 7° are the angle of a linear pair, find their measurement the angle
Answer:
x = 22°
the angles are: 63° and 117°
Step-by-step explanation:
a linear pair of angles total together to be 180°
so:
3x - 3 + 5x + 7 = 180
combune like terms:
8x = 176
divide both sides of the equation by 8:
x = 22°
the angles are: 63° and 117°
If −x+8y=−3 is a true equation, what would be the value of 2(−x+8y)?
Answer: -6
Step-by-step explanation:
If −x+8y=−3 is a true equation, we plug in -3 for -x + 8y, we get 2(-3) = -6.
Write an equation of the line. Express the answer using either the general form or the slope-intercept form of the equation of a line.
Answer:
y=x-4
Step-by-step explanation:
The graph intercepts the y-axis at -4 and when you do rise over run you get 4/4 which is just equal to 1 so there would not be a coefficient in front if x
What is the quotient of 5 1/2 ÷ 3/8?
Answer:
14 2/3
Step-by-step explanation:
It's easiest to convert 5 1/2 to the improper fraction 11/2.
Then the problem calls for dividing 11/2 by 3/8, which, in turn, is equivalent to
the product of 11/2 and 8/3:
11 8
---- * ----- = 88/6 or 44/3 or 14 2/3
2 3
Optionally you could convert to mixed decimal fractions:
5.5
---------- = 14 2/3 (same as before)
0.375
Answer:
..............
Step-by-step explanation:
Same i am not that questin pls help
ill give u crown thingy
5 - Numbers from 1 to 50 are written on a piece of paper and dropped into a box. A paper is chosen at random
What is the probability of getting a number less than 19? (whole percentage)
%
Answer:
1 out of a 50% chance
Step-by-step explanation:
hope it helps
Britton simplified an expression and got 1 108 for his answer. If he simplified correctly, which expression did Britton simplify?
Answer:
step-by-step explanation:
first you will have to convert 3/4 into a decimal
which is .75
then you will have to divide 1.5 by .75
which is 2
no you have to divideStep-by-step explanation:
Write with rational exponents. Be sure to show your work and simplify your answer. See the file below.
Answer:
(12ab)^1/2
Step-by-step explanation:
(⁶√12ab)³
= [(12ab)^1/6]³
= (12ab)^(1/6 * 3)
= (12ab)^1/2.
Simplify (2x + 5y)(3x – 7y) - 2xy
Helpppp
Can someone help me please
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: (-10,-2)
Just multiply the points by 2
I hope this helped!
<!> Brainliest is appreciated! <!>
- Zack Slocum
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer:
(-10,-2)
Step-by-step explanation:
Kris claims that the two figures must be congruent.
Two triangles have angles 100 degrees, 50 degrees, and 30 degrees.
Which statement best describes his claim?
He is correct because both figures are triangles.
He is correct because the measures of the angles are the same in both figures.
He is incorrect because the triangles are not oriented the same way.
He is incorrect because the lengths of the corresponding sides of the figures are unknown.
Answer: it’s D) the last one
Jasmine swims 12 laps every afternoon, Monday through Friday. How many laps does she swim in one week?
Answer:
60
Step-by-step explanation:
In one week, Jasmine swims on Monday, Tuesday, Wednesday, Thursday, and Friday. Meaning she swims 5 days a week. If she swims 12 laps on all 5 days, then she swims a total of 60 laps.
urgent please help. will mark brainliest.
[tex]given \: that \: p = {x}^{2} + 4x - 2 \: and \: q = 2x - 1 \: and \: q - p = 2 \: find \: x[/tex]
Answer:
x= -1
Step-by-step explanation:
p= x² +4x -2 -----(1)
q= 2x -1 ------(2)
q -p= 2 -----(3)
Substitute (1) and (2) into (3):
2x -1 -(x² +4x -2)= 2
2x -1 -x² -4x +2= 2 (Expand bracket)
-x² -2x +1=2 (Simplify)
x² +2x +2 -1= 0 (Bring all terms to one side)
x² +2x +1= 0
(x +1)²= 0 (Factorise)
x +1= 0 (Square root both sides)
x= -1 (-1 on both sides)
zoey invested $230 in a account interest rate was 6.3% daily to the nearest hundred dollars, would be after 12 years
Describe lengths of three segments that could not be used to form a triangle. Segments with lengths of 5 in., 5 in., and ______ in. Cannot form a triangle.
Answer:
[tex]c = 11[/tex]
Step-by-step explanation:
Given
Let the three sides be a, b and c
Such that:
[tex]a = b= 5[/tex]
Required
Find c such that a, b and c do not form a triangle
To do this, we make use of the following triangle inequality theorem
[tex]a + b > c[/tex]
[tex]a + c > b[/tex]
[tex]b + c > a[/tex]
To get a valid triangle, the above inequalities must be true.
To get an invalid triangle, at least one must not be true.
Substitute: [tex]a = b= 5[/tex]
[tex]5 + 5 > c[/tex] [tex]===>[/tex] [tex]10 > c[/tex]
[tex]5 + c > 5[/tex] [tex]===>[/tex] [tex]c > 5 - 5[/tex] [tex]===>[/tex] [tex]c > 0[/tex]
[tex]5 + c > 5[/tex] [tex]===>[/tex] [tex]c > 5 - 5[/tex] [tex]===>[/tex] [tex]c > 0[/tex]
The results of the inequality is: [tex]10 > c[/tex] and [tex]c > 0[/tex]
Rewrite as: [tex]c > 0[/tex] and [tex]c < 10[/tex]
[tex]0 < c < 10[/tex]
This means that, the values of c that make a valid triangle are 1 to 9 (inclusive)
Any value outside this range, cannot form a triangle
So, we can say:
[tex]c = 11[/tex], since no options are given
what is the value of a and b
Solve for b
2/3b+5=20-b
b=
Answer:
the answer is b=9 and good luck .
Solve for kkk. \dfrac{3}{k} = \dfrac{4}{5} k 3 = 5 4 start fraction, 3, divided by, k, end fraction, equals, start fraction, 4, divided by, 5, end fraction k =k=
Answer: [tex]\dfrac{15}{4}[/tex]
Step-by-step explanation:
Given
[tex]\Rightarrow \dfrac{3}{k}=\dfrac{4}{5}[/tex]
Apply cross-multiplication
[tex]\Rightarrow K=3\times \dfrac{5}{4}=\dfrac{15}{4}\\\\\Rightarrow k=3\ \dfrac{3}{4}[/tex]
The value of k is [tex]\dfrac{15}{4}\ \text{or}\ 3\ \dfrac{3}{4}[/tex]
Answer:
15/4
Step-by-step explanation:
I don’t need you to solve anything don’t worry about the numbers but is this triangular prism
A) rectangle/parallelogram
B) triangle
C) trapezoid
Plz help I’m confused
Answer:
This is a triangle prism
Step-by-step explanation:
It definitely can't be rectangle, parallelogram, or trapezoid