Answer:
2
Step-by-step explanation:
2(3x²-5)-5=9
6x²-10-5=9
6x²-15=9
6x²=9+15
6x²=24
x²=24/6
x²=4
x=2
What is the perimeter of the rectangle? 7cm 7cm 5cm 5cm
O 22 centimeters
O 24 centimeters
O 26 centimeters
O 28 centimeters
Answer:
24 centimeters
Step-by-step explanation:
7 + 7 + 5 + 5 = 24
have a nice day :)
In a study of the effect of cigarette smoking on the carbon monoxide diffusing capacity (DL) of the lung, researchers found that current smokers had DL readings significantly lower than those of either ex-smokers or nonsmokers. The carbon monoxide diffusing capacities for a random sample of n =20 current smokers are listed here:
103.768 88.602 73.003 123.086 91.052
92.295 61.675 90.677 84.023 76.014
100.615 88.017 71.210 82.115 89.222
102.754 108.579 73.154 106.755 90.479
Required:
a. Do these data that the mean DL reading for current smokers is significantly lower than 100 DL, the average for nonsmokers? Use αα=.01.
b. Find a 99% upper one-sided confidence bound for the mean DL reading for current smokers. Does this bound confirm your conclusions in part a?
Answer:
we conclude that mean DL reading for current smokers is significantly lower than 100 DL
μ ≤ 98.32
Step-by-step explanation:
Given :
H0 : μ = 100
H1 : μ < 100
Given the sample data:
103.768 88.602 73.003 123.086 91.052
92.295 61.675 90.677 84.023 76.014
100.615 88.017 71.210 82.115 89.222
102.754 108.579 73.154 106.755 90.479
Sample mean, xbar = 89.855
Sample standard deviation, s = 14.904
Test statistic :
(Xbar - μ) ÷ (s/√n)
(89.855 - 100) /(14.904/√20)
-10.145 / 3.3326357
Test statistic = - 3.044
Pvalue : using the Pvalue from T score calculator :
Pvalue = 0.00333
Pvalue < α ; Reject H0
Hence, we conclude that mean DL reading for current smokers is significantly lower than 100 DL.
b. Find a 99% upper one-sided confidence bound for the mean DL reading for current smokers. Does this bound confirm your conclusions in part a?
Tcritical at 99% (one sided) = 2.54
Upper confidence interval :
Xbar ± standard Error
Standard Error = Tcritical * s/√n
Standard Error = 2.54 * 14.904/√20 = 8.465
Upper boundary:
Xbar + standard error
89.855 + 8.465 = 98.32
μ ≤ 98.32
The point Q(0, -1) is translated 6 units up. What are the coordinates of the resulting point, Q′?
Answer:
Q' (0,5)
Step-by-step explanation:
We know that original point Q is (0, -1), we are then told that it has been translated 6 units up. With being asked what is the new point coordinates, or Q'.
To solve, first we need to know what axis belongs to what.
X is left and right
Y is up and down.
Since we know that Q' is 6 units higher than Q, we need to increase the value in the y axis. (x,y)
-1 + 6
5
Therefore the coordinates to Q' is (0,5)
Answer:
(0,5)
Step-by-step explanation:
I can help
(x, y) is the order.
X is horizontal
y is vertical
If you move up 6 from -1, it goes
0 1 2 3 4 5
Therefore you will get (0,5)
I hope I help and made it simple fro you to understand.
Can I please have brainliest?
What's the difference in the range of temperatures recorded last year and the range of temperatures recorded two years ago?
Answer:
0°C
No Modal
Step-by-step explanation:
The range of a set is calculated by subtracting the max value by the lowest value in the set. Which using the data provided would be the following
range Last Year: 19 - 9 = 10
range 2 years ago: 17 - 7 = 10
Since we see that the range for both sets is 10 degrees then the difference is 0 degrees.
There is no modal temperature last year since no same temperature has appeared more than once.
If θ is a second-quadrant angle and cosθ = - 2/3, then tanθ=
a. -2 (sqrt 5)/5
b. - (sqrt 5)/2
c. - (sqrt 5)/3
Answer:
since in second quadrant cos θ is negative.
Cos θ=b/h=2/3
b=2
h=3
p=√(3²-2²)
p=√5
Now
Tan θ=p/b=√5/2
since in second quadrant tanθ is negative
so
Tanθ=-√5/2
b. - (sqrt 5)/2
In second Quadrant cos is negative
cosØ=b/h=2/3So
b=2 and h=3
Perpendicular
p²=h²-b²p²=3²-2²p²=5p=√5tanØ=-p/b =-√5/2
what is the equation of the line that passes through the point (0,4) and (3,8)
Answer:
B
Step-by-step explanation:
this should be right
Answer:
[tex]y=\frac{4}{3}x + 4[/tex]
Step-by-step explanation:
I used the slope formula and slope-intercept form y = m x + b to find the equation.
Hope this helps:)
Record the data in a table with the rows representing the type of music and the columns representing the weeks.
What number does element a12 represent?
90
100
150
200
Answer:
150
Step-by-step explanation:
The element a₁₂ represents the first row and second column which is 100. Then the correct option is B.
What is a histogram?A diagram is made up of rectangles whose size is related to a variable's frequency and whose width is comparable to the training sample.
A matrix is a specific arrangement of items, particularly numbers. A matrix is a row-and-column mathematical structure. The a_{ij} element in a matrix, such as M, refers to the i-th row and j-th column element.
Record the data in a table with the rows representing the week and the columns representing the type of music.
The element a₁₂ represents the first row and second column which is 100. Then the correct option is B.
More about the histogram link is given below.
https://brainly.com/question/16819077
#SPJ2
What is the area of this figure?
Answer:
[tex] 220.5 \: {yd}^{2} [/tex]
Step-by-step explanation:
Area of the figure = Area of the arc with radius 10 yd and central angle 90° + Area of rectangle with dimensions (10 + 5 - 3 = 12) 12 yd and (7 + 6 - 4 = 9) 9 yd + Area of square with dimension 4yd + Area of rectangle with dimensions 3 yd by 2 yd + Area of triangle with base 3 yd and height (5 + 3 = 8) 8 yd.
[tex] = \frac{90 \degree}{360 \degree} \times 3.14 {(10)}^{2} + 12 \times 9 + {4}^{2} \\ + 3 \times 2 + \frac{1}{2} \times 3 \times 8 \\ \\ = \frac{1}{4} \times 314 + 108 + 16 + 6 + 12 \\ \\ = 78.5 + 142 \\ \\ = 220.5 \: {yd}^{2} [/tex]
James has 16 more game cards than Fay. If they have 48 game
cards altogether, find the number of game cards James has.
Answer:
James has 32 game cards
Step-by-step explanation:
X=Fay
x+16=James
X(Fay) + (x+16) James =48
x+x+16=48
2x=32
x=16 Fay
x+16 James
16 + 16=32 James
check answer:
16 Fay + 32 James =48
16+32=48
48=48
1.5r – 3r + 8r + 2.5r
Answer:
9r
Step-by-step explanation:
There was a total of 184 teachers and students at an archery lesson.
3/4
of the teachers is equal to of the students.
2/5
How many teachers were there at the archery lesson?
Subtract the product of 5 and 8 from 50.
HOW DO I WRITE THIS IN A NUMERICAL EXPRESSION?
Answer:
50-(5×8)
Step-by-step explanation:
brainliest please
The hypotenuse of a right triangle has length 15 and one leg has length 5. The length of the other leg is
Answer:
15.81
Step-by-step explanation:
c=a^2+b^2=5^2+15^2≈ 15.81139
HELP FAST PLEASE WILL MARK BRANLIIST help with all 3 please
Answer:
See below
Step-by-step explanation:
5. 3x^2 y
6. x
7. 5y^2 b^2
You can factor, getting these answers shown above
Hope this Helps!
plz help I don't understand this
Answer:
A and B tbh
Step-by-step explanation: there is only 5 prime numbers in 12 and A and B are 6 and 6 a ratio of 6:6
Thus both A and B will be right unless you can pick multiple its A and B
If you shift the quadratic parent function, f(x) = x2, right 12 units, what is the equation of the new function? O A. g(x) = (x - 12) B. g(x) = (x+ 12) O c. g(x) = x2 - 12 O D. g(x) = x2 +12
Carol has 8 3/4 yards of material. She needs to use 1/3 of the material to make a dress. How many yard of material will she need to make the dress
9514 1404 393
Answer:
2 11/12 yards
Step-by-step explanation:
Sometimes it works best to use improper fractions when multiplying mixed numbers and/or fractions.
1/3(8 3/4) = 1/3(35/4) = 35/12 = 2 11/12
Carol will need 2 11/12 yards of the material for the dress.
Answer:
2 11/12 yards
Step-by-step explanation:
write the multiplicative inverse of
a) -13/19
Answer:
[tex] - \frac{19}{13} [/tex]
Step-by-step explanation:
[tex]the \: multiplicative \: inverse \: of \: \\ - \frac{13}{19} = - \frac{19}{13} [/tex]
Product of a number and its multiplicative inverse should be equal to 1.
So,
[tex] \bigg ( - \frac{13}{19} \bigg) \bigg ( - \frac{19}{13} \bigg) [/tex]
[tex]= \frac{13}{19}\times \frac{19}{13} [/tex]
[tex]=1 [/tex]
If f(x) = x2, g(x) = 5x, and h(x) = x + 4, find each value. 17. g[h(–2)]
a. 7 b. 10 c. 30 d. 100
Answer:d
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
What are the characteristics of a function and how can we identify them?
Answer:
A function is a mathematical relationship where all inputs must have exactly one output. If there is more then one output for one input, then the relationship is not a function.
x is most of the time the input and y the output for an equation:
y = 2x
of course the input and output could be any variable.
Step-by-step explanation:
Have a nice day!
x root +29= root 4096
Select the statement that is FALSE. The range is never greater than the greatest value of a data set. The interquartile range is the difference between the highest and lowest values in the middle of a data set. The range is the difference between the largest and smallest values of a data set. The mean is never greater than the greatest value of a data set.
Answer:
The interquartile range is the difference between the highest and lowest values in the middle of a data set.
Step-by-step explanation:
The range is the difference between the maximum and minimum value, hence, it cannot be greater than the maximum value, which is the greatest value in a dataset, the highest value a range could have being equal to the maximum value when the minimum vlaue of the dataset is equal to 0.
The mean is the average value of a dataset, hence, it cannot be greater than the maximum value.
The interquartile range is the middle 50% or half of a dataset and not the difference between the highest and lowest middle values in the middle. It is obtained by taking the difference of the upper and lower QUARTILE.
for which values of x is f(x) > g(x)
Answer:
Step-by-step explanation:
C ?
Same-side interior angles always add
up to 180°. If 44 and 46 are same-side
interior angles, what is the measure of «6?
44=123°
4 6 = [?]
46
Answer:
∠6 = 57°
Step-by-step explanation:
∠6 = 180° - 123° = 57°
Between two friends
disbeliever, in ghost
the one a believer and other
tories
Answer:
Mean girls or Clueless
Step-by-step explanation:
Plssss helppp with part B
Answer:
12:7
Step-by-step explanation:
From the diagram shown;
QS/PS = RT/PT
QS/PS = RT/PS+ST
QS/14 = RT/14+10
QS/14 = RT/24
14RT = 24QS
RT/QS = 24/14
RT/QS = 12/7
Hence the required ratio is 12:7
heartbreak anniversary
Answer:
Please include a picture or question of it please if you want someone to answer it.
The circumference of a circle is 132 dm, find it's diameter?
Answer:
42.0169cm
Step-by-step explanation:
Using the formulas
C=2πr
d=2r
Solving ford
d=C
π=132
π≈42.0169cm
a die is rolled 200 times with the following results outcome 123456 frenquency 32,36,44,20,30,38 what is the probability of rolling the given result ah number more than 3
Answer:
44%
Step-by-step explanation:
P(>3) =
P(4 or 5 or 6) =
(20 + 30 + 38)/200 =
88/200 = 0.44 or 44%
I need help again I don’t understand this
Answer:
i'm not too sure about the other ones but i know that 2^5 (the third choice) is an answer
Answer:
I think the answer would be the third choice