Answer:
let
m = the speed of Mattie
d1 = 180 mi the distance Mattie traveled
p = the speed of the plane
d2 = 630 mi the distance the plane traveled
the speed of the plane was 150 mph faster than the speed of the car
p = m + 150
since speed = distance/time => time = distance/speed
d1/m = d2/p
180/m = 630/p cross multiply
180p = 630m divide both sides by 90
2p = 7m
by solving the system of equations
p = m + 150
2p = 7m
we find
p = 210 mph
The speed of the plane was 210 mph
The following confusion matrix for a classification method with Class 0 and Class 1 was found by Data Mining: Confusion Matrix Predicted Class Actual Class 0 1 0 105 53 1 32 110 What are the percent error rates for Class 0 and Class 1? a. 31.65% and 22.54%, respectively b. 33.54% and 22.54%, respectively c. 10.71% and 41.25%, respectively d. 45.37% and 46.67%, respectively
Answer:
b. 33.54% and 22.54%, respectively
Step-by-step explanation:
Confusion Matrix
Predicted Class
Actual Class 0 1 Total
0 105 53 158
True Positive False Negative
TP FN
1 32 110 142
False Positive True Negative
FP TN
Total Error Rate = FN +FP/ P +N
Total Error Rate = 53+32/ 105+32+53+110
Total Error Rate = 85/300 = 28.33%
Error Rate for Class 0 = FP/ FP+TP= 32/142 = 22.53%
Error Rate for Class 1= FN/ FN+TP= 53/ 158= 33.54%
Solve-20-5>3.
Which graph shows the solutions?
According to the 2010 Census information, 13.6% of those living in Lucas County are living in poverty. A random sample of 489 people living in Lucas County yielded that 16% of them report living in poverty. Test the claim that the poverty rate has increased since 2010. The level of significance is 0.10. c. Suppose the p-value is 0.085. State the conclusion of this test.
Answer:
Option b .
Step-by-step explanation:
Given that
The 13.6% represent the people living in property
There is a random sample of 489 people in that 16% of them would be in poverty
The significance level is 0.10
ANd, the p value is 0.085
We need to find out the conclusion
According to the attached options, we considered that there is enough evidence in order to support the claim that result in rise in the poverty rate
I need some explaining this is so unclear
What’s the correct answer??? I will mark as brainlest?
Answer:
t=0.15n
Step-by-step explanation:
I had it on a test and it was correct
3.75=0.15(25)
and when you times 0.15*25 it equals 3.75
62 - (5 - 4) + 2(8 - 22) / 8
Answer:
This is BIDMAS / BODMAS
You need to do BRACKETS first, so 5 - 4 = 1. Now if it is NOT the sequence then it would be 62 - 1 + 2 = 63. The rest I do not know.
Answer:
57.5
Step-by-step explanation:
62 - (5 - 4) + 2(8 - 22) ÷ 8
62 - (1) + 2(- 14) ÷ 8
62 - 1 - 28 ÷ 8
61 - 3.5
57.5
find the supplementary angle of the following write the answer in the blank
Here’s the next problem:)
Answer:
disagree
Step-by-step explanation:
toa=opposit over adjacent= 12/9
tan(x)=12/9
tan^-1=12/9
x= 53.1
Answer:
Disagree
Step-by-step explanation:
x actually equals 53.13
у= 3х-5
у = 3х+12
Please help ASAP for my lil sister
Answer:
0
Step-by-step explanation:
The equation is undefined.
Hiiii!!! help! I'll mark brainliest
Answer: C/ The third one
Step-by-step explanation:
Write an addition equation or a subtraction equation (your choice!) to describe the diagram.
johns rent is $1,355. what is his standardized z-score
Answer:
His standardized z-score is [tex]Z = \frac{1355 - \mu}{\sigma}[/tex], in which [tex]\mu[/tex] is the mean price of rents and [tex]\sigma[/tex] is the standard deviation for price of rents.
Step-by-step explanation:
Z-score:
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Johns rent is $1,355.
This means that [tex]X = 1355[/tex]
What is his standardized z-score
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{1355 - \mu}{\sigma}[/tex]
His standardized z-score is [tex]Z = \frac{1355 - \mu}{\sigma}[/tex], in which [tex]\mu[/tex] is the mean price of rents and [tex]\sigma[/tex] is the standard deviation for price of rents.
Select all ratios equivalent to 8:16.
14:12
13:32
3:6
Answer:
3:6
Step-by-step explanation:
8:16 is a 1/2 ratio
help with the Area of a circle
Answer:
A = 201.06 units²
A = 78.54 units²
Step-by-step explanation:
Formula for area of a circle = πr²
✔️Area of the first circle:
r = ½(d) = ½(16)
r = 8
Area = π*8² = π*64
Area = 201.06 units²
✔️Area of the second circle:
r = 5
Area = π*5²
= π*25
Area = 78.54 units²
John buys 6 shares for $3 each. He sells them for $4. What is his capital gain?
He bought them for $3 each and sold them for $4 each. That is a gain of $1 for each stock (4-3 = 1)
6 stocks x $1 = $6 total gain
6+3+4=13
Step-by-step explanation:
and if u multiple are divided u will get 6×3×4= 72 and if u divided 6÷3÷4=0.5and if u multiple and divide u will get 4.5
What is the probability that a person orders sandwich with cheddar cheese
Answer:
16.67%
Step-by-step explanation:
Double the product of 4y and 3b if y=2 and b=1.
Answer:
48
Step-by-step explanation:
Double the product of 4y and 3b
2 * ((4y) * (3b))
y = 2 and b = 1
2 * ((4 * 2) * (3 * 1))
2 * (8 * 3)
2 * 24
48
SOMEONE SMART PLEASE HELP ME!! a rectangle's area is 336 mm Its height is 16 mm. What is its bases?
Answer:
The base of the rectangle is 21 mm.
Step-by-step explanation:
Given that a rectangle's area is 336 mm, and its height is 16 mm, to determine what is the measure of its base, the following calculation must be performed, knowing that the area of a rectangle arises from multiplying its base by its height:
16 x X = 336
X = 336/16
X = 21
Therefore, the base of the rectangle is 21 mm.
Suppose you conduct a hypothesis test based on a sample where the sample size is n = 50, and arrive at a p-value of 0.08. You then refer back to your notes and discover that you made a careless mistake, the sample size should have been n = 500. Will your p-value increase, decrease, or stay the same? Explain.
Answer:
Decrease
Step-by-step explanation:
The Pvalue is used to measure the level or decide if a particular research claim is significant or not. The sample size also plays a role in the Pvalue of a statistical analysis. Larger sample sizes tend to prove the significance of the claim. Using the Pvalue approach, the significance of a claim is examined by the and established by small P values. Therefore, an initial Pvalue of 0.08 obtained using a sample size of 50. The Pvalue will most likely witness a further decrease in the Pvalue if the sample size is increased to 500 as this would move the claim closer to being significant.
PLEASE HELP! I WILL GIVE BRAINLIEST! Determine whether the statement is always, sometimes, or never true.
13. If a triangle is acute triangle, then it is an equilateral triangle.
14. If a triangle has two acute angles it must be an acute triangle. 15.An obtuse triangle can have a right angle.
Answer:
13 True
14 Sometimes
15 Never
Step-by-step explanation:
All equilateral triangles must have 60 degree angles
Sometimes a acute triangle can have 2 acute angles
Obtuse angles take up majority of the mesuares in the triangle. All triangles must have 3 angles equal up to 180 degrees
Will give brainliest
Find the mean, median, mode, and range of the following data. Then, create a line plot, histogram, and a box‐and‐whisker plot for the data. 65, 75, 93, 95, 84, 67, 75, 65, 65, 72, 83, 74
Answer: There is a picture below of my work. Sorry for my sloppy hand writing.
Answer:
Step-by-step explanation:
84
Which of the following equations describes the line shown below? Check all
that apply.
Answer:
B. y = 2x - 2
E. [tex] y + 4 = 2(x + 1) [/tex]
F. [tex] y - 6 = 2(x - 4) [/tex]
Step-by-step explanation:
The equation of the line can be found using either the point-slope equation or the slope-intercept equation.
✔️Equation of the line in point-slope using the slope and the coordinates of the point (4, 6):
Slope = m = change in y/change in x
Using (4, 6) and (-1, -4),
m = (-4 - 6)/(-1 - 4)
m = -10/-5
m = 2
Substitute m = 2, and (a, b) = (4, 6) into the point-slope equation form [tex] y - b = m(x - a) [/tex]
Thus:
[tex] y - 6 = 2(x - 4) [/tex]
✔️Equation of the line in point-slope using the slope and the coordinates of the point (-1, -4):
Slope = m = 2
Substitute m = 2, and (a, b) = (-1, -4) into the point-slope equation form [tex] y - b = m(x - a) [/tex]
Thus:
[tex] y - (-4) = 2(x - (-1)) [/tex]
[tex] y + 4 = 2(x + 1) [/tex]
✔️Equation of the line in slope-intercept form, y = mx + b
Where,
m = slope = 2
b = y-intercept = -2 (the point where the line intercepts the y-axis)
Thus, substitute m = 2 and b = -2 into y = mx + b
y = 2x + (-2)
y = 2x - 2
What is the output for an input of "9" for "n" for the equation m=4n-6.
Answer:
so m=30
Step-by-step explanation:
4x9 is 36
36-6 is 30.
Answer:
m = 30
Step-by-step explanation:
Write the Ratio of sin A/Cos B/ tan B
Answer:
Step-by-step explanation:
sinA= 8/10= 4/5
CosB= 8/10=4/5
tanB=6/8=3/4
6. What is the first step in financial planning?
Answer:
determining your current financial situation.
Step-by-step explanation:
Answer:
determining your current financial situation
Step-by-step explanation:
I will give brainliest
Answer:
Step-by-step explanation:
make a right triangle to find the lenght of a side which is also the hypotenuse of the triangle
c² = a² + b²
c² = 7² + 5²
c² = 49 + 25
c² = = 74
Since the area of a square is s² and c = s
a = c²
a = 74 units²
AB is the midsegment of AXYZ and PQ is the midsegment of XAB. What is the relationship in length between PQ and YZ? O PQ = 1/8 Y Z O PQ = 1/2YZ O PQ = 1/4Y Z O PQ = 1/3YZ
Answer:
third option: PQ = 1/4(YZ)
Step-by-step explanation:
By the Midsegment Theorem, a midsegment is 1/2 the side across it. Using this, we can say:
In triangle XYZ, AB = 1/2(YZ)
And in triangle XAB, PQ = 1/2(AB)
We can substitute AB into the second equation to get:
PQ = 1/2(1/2(YZ))
PQ = 1/4(YZ)
This is the third option.
someone please help me with this
9514 1404 393
Answer:
x = 39
Step-by-step explanation:
The Pythagorean theorem tells you the sum of the squares of the sides of a right triangle is the square of the hypotenuse.
x² +80² = 89²
x² = 89² -80² = 7921 -6400 = 1521
x = √1521
x = 39
Which one of these diagrams shows its reference angle in standard position?
Answer:
A
Step-by-step explanation:
MARK AS BRAINLIEST!!
why is coal a non-renewable energy source