Answer:
5
Step-by-step explanation:
Sent from my iPhone and it is the email address that you sent me
A scientist is studying the effects of cell phone use on headache rate. She identifies 30 people who use cell phones and 30 who do not. Each of the 60 people is given a questionnaire designed to determine headache frequency. None of the 60 people who participated in the study knew they were part of a study. Which statement is true?
Answer:
C this is a double blind study.
Step-by-step explanation:
Both groups in the experiment are blind (don't know they are in an experiment). If this answer is incorrect then its A.
Answer:
observational study
Step-by-step explanation:
the experimenters are not blind to their own tests.
∠1 and ∠2 are a linear pair. If the m∠2 = 33°, find the m∠1.
Answer:
157 degrees
Step-by-step explanation:
A linear pair is 180 degrees.
180-33 = 157
Answer:
m∠1 = 147°
Step-by-step explanation:
Since both angles are a linear pair, they both add up to 180°. This means that if m∠2 = 33°, then m∠1 would be 180°-33° which is 147°.
180°-33°=147°
The ordered pairs in the table below define a function.
X Y
-2 9
0 5
2 1
4 -3
Select ALL of the equations that describe a function that is less steep than the function defined in the table.
⭕️ Y= 5
⭕️ Y = -3x
⭕️ Y = -x+6
⭕️ Y= -6x+3
⭕️ Y = -1/2x-4
Answer:
The 1st, the 4th, and the 5th ones are the answer :)
Step-by-step explanation:
- 1/2(6p+16)=7 solve for p
Answer:
p = -5
Step-by-step explanation:
-1/2* 6 = -3p
-1/2*16 = -8
-3p-8 = 7
7+8 = 15
-3p=15
15/-3 = -5
Step-by-step explanation:
p
2
+6p−16
=p
2
+8p−2p−16
=p(p+8)−2(p+8)
=(p+8)(p−2)
what is the equation of the line in slop-intercept form HELPP PLZZZZZZZZZZ
Answer:
y = 3/5x + 3
Step-by-step explanation:
(y2-y1)/(x2-x1) = slope
pick 2 points (0,3) and (-5,0)
(0-3)/(-5-0) = -3/-5 = 3/5
y = 3/5x + b
3 = 3/5(0) + b, b = 3
equation y = 3/5x + 3
6 1 message Noah's dog eats 8 ounces of dog food each day. Noah bought a 28-pound bag of dog food. How many 8-ounce servings are in a 28-pound bag of dog food?
what is the coefficient in the expression 10x +8?
Answer: It is 10
Step-by-step explanation:
Find the opposite of each integer 0
Answer:
Thats not a full question.
Step-by-step explanation:
Answer:
0
Step-by-step explanation:
eight packs of pencils and two packs of crayons cost $30.if 7 packs of crayons cost $21, what is the ratio of the rice of the pack of crayons to the price of the packs fo pencils?
Plzzzzz help asappppppp
chris can type 490 words in 7 minutes how many word can he type per minute
Answer:
i think 70 words per minute
Step-by-step explanation:
−p^3 −5p−9
Select all coefficients.
Answer:
k
Step-by-step explanation:
k
If X = 25, what does X equal?
Answer: it should be 25!!
Step-by-step explanation:
Archaeologists are studying a shipwreck on the
ocean floor. The wreck site is roughly shaped like a
parallelogram. The archaeologists make a map of the
site in the coordinate plane. Each unit on the map
represents 1 m. According to the map, what is the
area of the wreck site?
The area of the wreck site is 85 square m if Archaeologists are studying a shipwreck on the ocean floor.
What is parallelogram?
In two-dimensional geometry, it is a plane shape having four sides, in which two pairs of sides are parallel to each other and equal in length. The sum of all angles in a parallelogram is 360°.
The question is incomplete.
The complete question is in the picture, please refer to the attached picture.
We have:
Archaeologists are studying a shipwreck on the ocean floor. The wreck site is roughly shaped like a parallelogram.
From the table:
The vertex of the P is (9, 2)
The vertex of the Q is (-8, 2)
The vertex of the R is (-7, 7)
The vertex of the S is unknown
From the distance formula we can find the distance between points P and Q:
The distance formula can be defined as the formula for finding the distance between two points. It has given the shortest path distance between two points.
The distance formula can be given as:
[tex]\rm d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
[tex]\rm PQ = \sqrt{(-8-(-9))^2+(2-2)^2}[/tex]
PQ = 17 units
[tex]\rm QR = \sqrt{(-7-(-8))^2+(7-2)^2}[/tex]
QR = 5.09 ≈ 5 units
The area of the wreck site = 17x5
The area of the wreck site = 85 square m
Thus, the area of the wreck site is 85 square m if Archaeologists are studying a shipwreck on the ocean floor.
Learn more about the parallelogram here:
brainly.com/question/1563728
#SPJ2
Consider the triangle.
The measures of the angles of the triangle are 32°, 53°, 95°. Based on the side lengths, what are the measures of each angle?
A)mAngleA = 95°, mAngleB = 53°, mAngleC = 32°
B)mAngleA = 32°, mAngleB = 53°, mAngleC = 95°
C)mAngleA = 43°, mAngleB = 32°, mAngleC = 95°
D)mAngleA = 53°, mAngleB = 95°, mAngleC = 32°
(Make sure to explain how you solved this problem and include things to remember when measuring angles like this. Thank you!)
Answer:
b
Step-by-step explanation:
edge 2020
Analyzing Intersections of Lines and Planes
Use the given diagram to answer the question.
Which line is the intersection of two of the planes
shown?
х
V
w
Which line intersects one of the planes shown?
B
z
Which line has points on three of the planes shown?
Done
DO
Answer:
x z y
Step-by-step explanation:
i took the assignment
Answer:
X , Z , Y
Step-by-step explanation:
60 is 25% of what number
12 is 24% of what number
Divide: StartFraction 5 Over 8 EndFraction divided by three-fourths One-eighth StartFraction 5 Over 6 EndFraction Three-fourths 1 and one-half
Answer:
the answer is 5 over 6
Step-by-step explanation:
well, you Start the Fraction with 5 Over 8 and End the Fraction divide by three-fourths One-eighth Start the next Fraction 5 Over 6 and End the Fraction Three-fourths 1 and one-half and the answer is 5/6
In △BCD, H is the centroid. If HF=6 find BF.
Answer:
18
Step-by-step explanation:
The centroid of a triangle is located ⅓ of the distance from each side to the opposite vertex
So HF=⅓BF
So BF=3xHF=3x6=18
Brainless to right answer...
Answer:
Ha, you said "Brainless" instead of *Brainliest*
Lol, here i am, Miss Brainless has arrived!
Step-by-step explanation:
Sry, dude, i just need points...
Answer:
The answer to this equation is 4 7/10, or 4.7.
Step-by-step explanation:
Hopefully this helps you!
help please
3/11 × 4/9 =
Answer:
4/33
Step-by-step explanation:
Multiply 3x4 across which equals 12
Multiply 11x9 across which equals 99
Simplify to equal 4/33
Hope this helps!! :)
Answer:
Exact Form:
433
Decimal Form:
0.¯¯12¯¯
Step-by-step explanation:
What is the slope through
the points (1,-2) and (2,-2)?
Answer: 0
Step-by-step explanation:
DEPERATE PLZ HELP IM ON A TIMED TEST
write the slope intercept form of the line that passes through the two points given (-1,-8) (2,10)
Answer:
y = 6x - 2
Step-by-step explanation:
Let the equation of the line be y = mx + c
m = (10 - (-8))/(2 - (-1)) = 6
sub (2, 10):
10 = 6(2) + c
c = -2
therefore, the equation of the line is y = 6x - 2
This is a question on coordinate geometry/graphs. If you wish to venture further into it/understand this topic better, you may want to follow my Instagram account (learntionary), where I post some of my own notes on certain topics and also some tips that may be useful to you :)
X^3-4x^2+3x+2=0 find all the real values of x
Step-by-step explanation:
The factor of the polynomial is (x-2)
We know that dividing a third degree polynomial by a first degree factor will yield a quadratic of the form ax²+bx+c and possibly a remainder r,except that in this case r=0 since x-2 is a factor
We therefore equate
x³-4x²+3x+2=(x-2)(ax²+bx+c)+r
x³-4x²+3x+2=ax³+bx²+cx-2ax²-2bx-2c+r
We group terms on the RHS
x³-4x²+3x+2=ax³+x²(b-2a)+x(c-2b)-2c+r
By equating the terms on both sides,
ax³=x³,a=1
Next,
b-2a=-4
b-2(1)=-4
b-2=-4
b=-4+2
b=-2
Next,
c-2b=3
c-2(-2)=3
c+4=3
c=-1
Now we piece together our quotient quadratic using a=1,b=-2,c=-1 to obtain x²-2x-1
We now find the zeros of x²-2x-1
which are 1+√2 and 1-√2
The values of x are therefore 2,1+√2, and 1-√2
Note that I used this method in lieu of the famous polynomial division approach to teach someone also ;)
Answer:
2, 1 +/- sqrt2
or 2, 2.414, -0.414 (correct to the nearest thousandth).
Step-by-step explanation:
Let x = 2: then
f(2) = 8 - 16 + 6 + 2 = 0
So x = 2 is one of the zeros.
So one factor of the function is x-2.
If we divide the function by (x - 2) we get:
x-2)X^3-4x^2+3x+2(x^2-2x-1
x^3- 2x^2
-2x^2+3x
-2x^2+4x
-x+2
-x+2
.......
So x^2-2x-1= 0
x = [-(-2 +/- sqrt(4 - 4*-1)] / 2
x = (2 +/- sqrt8) / 2
= 1 +/-sqrt8/2
= 1 +/- sqrt2
PLs, help me - an international company has 18,700 employees in one country. If this represents 32.8% of the company's employees, how many employees does it have in total? Round your answer to the nearest whole number.
Answer:
33.6% of X = 26800
X = 26800 / 33.6%
= 26800 / 0.336
= 79762
Note the answer is rounded
Step-by-step explanation:
33.6% of X = 26800
X = 26800 / 33.6%
= 26800 / 0.336
= 79762
Note the answer is rounded
Please help I’m confused!
Answer:
2nd option; [tex]c=9-a+b[/tex]
Step-by-step explanation:
The first thing you need to do, is rewrite the equation without the square root.So for instance [tex]\sqrt{16}=4[/tex] and [tex]16=(4)^2[/tex] therefore [tex]a-b+c=(3)^2[/tex] Then [tex]a-b+c=9[/tex] Now we take away ' [tex]a[/tex] ' on both sides and add ' [tex]b[/tex] ' on both sidesSo [tex]a-(a)-b+(b)+c=9-(a)+(b)[/tex] Which gives us [tex]0+0+c=9-a+b[/tex] which is simply [tex]c=9-a+b[/tex]Hope this helps
Please help as I’m confused
Try and do 2, as I’m not bothered if you guys can’t do all 3 :)
Answer:
the formula is base x height / 2
Step-by-step explanation:
try and use this formula to help you:)
84 + 46 + 94 - 66 + 75 + 72 - 58 + 21 =equal what??
The length of a rectangle is twice the width if the perimeter of the rectangle 60 units find the area of the rectangle
Answer:
200
Step-by-step explanation:
Length = 2w
2w + 2l = 60
substitute l out with 2w
2w + 2(2w) = 60
2w + 4w = 60
w = 10
l = 20
Area = w • l
= 10 • 20
= 200
which rational number is negative?
Answer:
-1/6, 2/-7, 30/11, 13/-19 and -15/23 are negative rationals