Answer:
-1128
Step-by-step explanation:
plsss heelp meeee i have been stuck on this for days
Answer: Step-by-step explanation:
-z<-7
z>7
7.1
8
12
work out the value of (6-2.5)( 8+4)
Answer:
42
Step-by-step explanation:
Uh, I'm guessing what is being asked here is to solve, so, time to distribute.
(6 - 2.5)(8 + 4)
48 + 24 - 20 - 10
42
A certain disease has an incidence rate of 0.6%. If the false negative rate is 8% and the false positive rate is 3%, compute the probability that a person who tests positive actually has the disease.
Answer:
0.1562 = 15.62% probability that a person who tests positive actually has the disease.
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
In which
P(B|A) is the probability of event B happening, given that A happened.
[tex]P(A \cap B)[/tex] is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
Event A: Tests positive
Event B: Has the disease.
Probability of a positive test:
100 - 8 = 92% of 0.6%(person has the disease).
3% of 100 - 0.6% = 99.40%(person does not have the disease). So
[tex]P(A) = 0.92*0.006 + 0.03*0.994 = 0.03534[/tex]
Probability of testing positive and having the disease:
92% of 0.6%. So
[tex]P(A \cap B) = 0.92*0.006 = 0.00552[/tex]
Probability that a person who tests positive actually has the disease.
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.00552}{0.03534} = 0.1562[/tex]
0.1562 = 15.62% probability that a person who tests positive actually has the disease.
What is the total surface area of the square pyramid whose net is shown?
Answer:
1,600 sq. inches
Step-by-step explanation:
Area of a triangle:
bh/2
= (20 x 30)/2
= 600/2
= 300
Area of square:
s^2
= 20^2
= 400
Four triangles:
300 x 4
= 1200
Total:
1200 + 400
= 1600
please ..........help me
Answer:
First statement: 10 road workers take 5 days to complete a work, working 2 hours a day.
Let us calculate how many days 2 workers will need, if they were to work at the same pace (i.e. each working 2 hours a day). The workforce is now decreased to 2 divided by 10 = 1/5 (i.e. one-fifth).
Therefore proportionately, the time will increase to 5 days divided by 1/5, (i.e. 5 / (1/5) = 25 days.
We now know that 2 workers will need 25 days to finish the work, if they work for 2 hors a day.
Now the question is what will happen if the two people work 5 hours per day, instead of 2 hours per day?
The labor they put in has increased to 5 divided by 2 = 2.5 (i.e. 2 and half times).
Consequently, the time needed to finish the work will decrease to 25 divided by 2.5 (i.e. ( 25 / 2.5 ) = 10. days.
The answer : 10 Days.
Ssomeone help me in this one now please
Answer:
700 runners
Step-by-step explanation:
HELP ME PLEASEEEEEEEEE
Answer:
is it 56 units²? if not sorry
Angle ABC and angle CBD are complimentary .CBD has an angle of 38 degrees What is the value of x?
Answer:
what school you do i think im on that
on thatStep-by-step explanation:
Answer:
142
Step-by-step explanation:
Complimentary means 180 degrees, so you have to subtract 38 from 180:
180
-38
142
1 x2 + 7x + 12 = ________________________
2 x2 - 3x - 10 = _________________________
3 x2 - 25 = _________________________
4 x2 - 100 = ________________________
5 4x2 - 9 = _________________________
6 16x2 - 121 = _________________________
7 x2 + 6x - 24 = _________________________
8 x2 - y2 = _________________________
9 81 - x2 = _________________________
10 36x2 - 100y2 = _________________________
Factor each expression
Answer:
1. 9x +12
2. -x = -10
3. x+25/2
4. 2 (x - 50)
5. 8x - 9
6. 32x - 21
7. 8x - 24
8. 2 (x - y)
9. x - 81/2
10. 72x - 200y
Step-by-step explanation:
hope this helps!! :)
What is the interest rate on a savings account of $10,000 that earns $2,000 after 4 years?
Answer:
5%
Step-by-step explanation:
2000/4=500 per year in interest
500/10000=.05 or 5%
A bag contains 9 red, 7 blue, and 4 yellow marbles. If a marble is chosen at random from the bag, what is the probability that it is NOT yellow? (in fraction form) A) 1 5 B) 1 3 C) 3 5 Eliminate D) 4 5
Answer:
D
Step-by-step explanation:
if you add all the numbers together you get a total of 20. if you add the non yellow marbles together you get 16. so the fraction is 16/20. then you shorten the fractions by dividing the numbers. both are divisible by 4, so the final answer is 4/5.
107 > 45+ y hurry pls
Answer:
C. y<62
Step-by-step explanation:
107<45+y
(take 45 from both sides)
62<y, or y>62
The answer of the given inequality is 107>45+y is y<62.
We have given that inequality
107<45+y
What is inequality?
Inequality is a relation that makes a non-equal comparison between two numbers or other mathematical expressions. It is used most often to compare two numbers on the number line by their size.
107<45+y
(take 45 from both sides)
Therefore the solution of inequality 62<y, or y>62.
To learn more about the inequality visit:
https://brainly.com/question/24372553
#SPJ2
If you got your 60% discount and opened up the card for an additional 20%, what is the actual % discount you would receive?
Please do not answer with link
Answer:
80 I guess.................
2. Ask. Which of the following statements should occur?
A. x = 6:
B. x <3:
C. x> 0:
D. x ^ 2 x:
F. Leave the question unanswered
20 POINTS!!!!!The monthly salary of an employee with 33 hours of training can be written as
Please help
Complete the square
to find the vertex
of this parabola.
y2-8x+2y+17=0
([?], [ ]
Answer:
the answer is 2,-1 please mark me brainless thank you
Answer:
The answer would be (2,-1)
Step-by-step explanation:
Fill in 2 and then -1
what is -2-5(-2-7i) simplify with full working?
What is the C term in this problem: x^2+3x+2
Answer:
2
Step-by-step explanation:
Cuz the form is Ax^2 + bx + c
A = 1 (imaginary)
B = 3
C = 2 (same as y-intercept)
For the right triangle above, which is closest to the value of x?
A .12
B. 18.8
C. 09
D. 20
if the circle is 2 inches what will the circumference be round to the nearest 10th
Peter loves to play soccer. He practices 30 minutes on the first day, 36 minutes on the second day, 43.2 minutes on the
third day. He keeps up this pattern for the entire month of October. How much time, in total, will he have practiced after 31
days? Round to the nearest thousandth.
Answer:
I don't have the ability to actually find the answer right now,
Step-by-step explanation:
but the numbers are increasing by 1/5 per number, so do with that what you will
help me and I’ll give you brainliest
Answer:
8
Step-by-step explanation:
It's a ratio.
h/15=24/45
cross-multiply
45h=360
h=8
What is the probability of choosing a 6 of clubs that's also a red card from a deck of cards? Type your answer as a fraction.
Answer: [tex]\dfrac{1}{52}[/tex]
Step-by-step explanation:
Given
We need to choose 6 of clubs that's also a red
A deck contains 13 cards of clubs, and 6 of clubs is the only red card i.e. favorable outcome is 1 out of 52 cards
Probability is the ratio of favorable to the total outcomes
[tex]\Rightarrow P=\dfrac{1}{52}[/tex]
NO LINKS OR ELSE YOU'LL BE REPORTED! Please give me the correct answer.Only answer if you're very good at math.
Dan received 45 out of 60 points on his science test. What percent did he receive on his test?
pls help
its was on khan academy
i will mark u brainiest!!!
Answer:
[tex]14 units[/tex]
Step-by-step explanation:
[tex]Solution:-[/tex]
[tex]A(5,1)B(7,1)[/tex]
[tex]\sqrt{(x_{1}-x_{2} ) ^{2}(y_{2} -y_{1}x^{2} }[/tex]
[tex]AB=\sqrt{(7-5)^{2} +(1-1)^{2} }[/tex]
[tex]= \sqrt{2^{2} } =2[/tex]
[tex]BC=\sqrt{7-7^{2}+(6-1)^{2} }[/tex]
[tex]=\sqrt{5^{2} } =5[/tex]
[tex]perimeter=2(AB)+2(BC)[/tex]
[tex]= 2(2)+2(5)\\[/tex]
[tex]= 4+10= 14[/tex]
[tex]-----------[/tex]
hope it helps...
have a great day!!
please help me this is confusing please add an explanation to it
Answer:
2
Step-by-step explanation:
As it would look better.
1 would make the graph too big
12 would be useless as there are no "answers" more than 12
10 would be useless too as the biggest number used is 10. therefore, 5, 7 would be cramped and too hard to figure out.
Evaluate the radical expression. Express your answer as an integer, simplified fraction, or a decimal rounded to two decimal places. If the expression does not represent a real number, indicate "Not a Real Number"
Answer:
undefined
Step-by-step explanation:
the expression is undefined in the set of real numbers
( HOPE THIS HELPED)
sharon runs 7/10 mile mile in 6 minutes. How many miles does she run in one minute? In one hour?
Answer:
7/60 miles in one minute
7 miles in one hour
Step-by-step explanation:
7/10 = 6 minutes
/6 /6
7/10 / 6 = 7/10 * 1/6 = 7/60
B. 7/10 = 6 minutes
*10 *10
7/10 * 10 = 70/10 = 7 miles
7 miles = 60 minuites
1. What angles are
congruent to angle 5?
Answer:
All angles that are either exterior angles, interior angles, alternate angles or corresponding angles are all congruent. The picture above shows two parallel lines with a transversal. The angle 6 is 65°. Is there any other angle that also measures 65° hope this helps you
Step-by-step explanation: