(2x + 25) (5y) (3x - 10) solve for x and y
Answer:
x=35 y=17
Step-by-step explanation:
2x+25=3x-10
3x-2x=25+10
x=35
(3x-10)+(5y)=180
(3(35)-10)+(5y)=180
95+5y=180
5y=180-95
y=85/5
y=17
The average person blink 15 to 20 times per minute how many times does the average person blink in an hour
Answer:
900-1200
Step-by-step explanation:
mutpliy by 60
. A random sample of 100 children with working mothers showed that they were absent from school an average of 6 days per term with a standard deviation of 1.6 days. Provide a 98% confidence interval for the average number of days absent per term for all the children. a. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. (10 points) b. Determine a 98% confidence interval estimate for the average number of days absent per term for all the children. (10 points)
Answer:
a) The equation is:
Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples
b) The 98% confidence interval = (5.62784, 6.37216)
Step-by-step explanation:
a. Write down the equation you should use to construct the confidence interval for the average number of days absent per term for all the children. (10 points)
Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples
b. Determine a 98% confidence interval estimate for the average number of days absent per term for all the children. (10 points)
Confidence Interval = Mean ± Z score × Standard deviation/√Number of samples
Mean = 6 days
Standard deviation = 1.6 days
Number of samples = 100
Z score of 98% confidence interval = 2.326
Confidence interval = 6 ± 2.326 × 1.6/√100
= 6 ± 2.326 × 1.6/10
= 6 ± 0.37216
= 6 - 0.37216
= 5.62784
6 + 0.37216
= 6.37216
Therefore, the 98% confidence interval = (5.62784, 6.37216)
Determine the equation of the inverse of y = e x + 3 - 4
Answer:it would be a
Step-by-step explanation:
I got it right on odseyware
The diameter of a circle is multiplied by 10 how does the circumference change?
Step-by-step explanation:
The circumference of a circle is given by :
C=2πr, r is the radius of the circle
Also, 2r = D, diameter of the circle
⇒ C = πD
If the diameter of a circle is multiplied by 10, it means,
C = π(10)
⇒ C = 10π
Hence, if the diameter of a circle is multiplied by 10, then its circumference becomes 10π.
A lamp was originally sold for $120.00. How much does it cost after a 20% discount??
Answer:
96
Step-by-step explanation:
the final value is 96 dollars
A 78 kg runner exerts a force of 69 N. What is the acceleration of the runner?(use the formula a=F/m)
Answer:
The answer is 0.88 m/s²Step-by-step explanation:
To find the acceleration given the mass and force we use the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
a is the acceleration
m is the mass
F is the force
From the question
m = 78 kg
F = 69 N
We have
[tex]a = \frac{69}{78} = \frac{23}{26} \\ = 0.8846153...[/tex]
We have the final answer as
0.88 m/s²Hope this helps you
5c.) Use this to calculate the area of a square that has perimeter 18 units.
Answer:
A= 20.25 units
Step-by-step explanation:
A= p²/16
=18²/16
=20.25 units
Frederick Douglass was born a slave in Maryland.
Answer:
That is a fact i think but let me reaserch for that and tomorrow i will give you an answere
Answer:
He was born a slave, circa 1817;
Step-by-step explanation:
A $55 pair of shoes was discounted 15 percent, making the sale price $46.75. The discounted price was then discounted again by 10 percent. Explain how you would find the final price of the shoes.
Answer:
Hi there
Your answer is
$42.08
To find the final price of the shoes, we would use the 15% discounted price, $46.75, as 100% and find 10% discount of that.
46.75 = 100%
/10
4.675 = 10%
Now, subtract 10% from the 15% discounted price
46.75 - 4.675 = 42.075$ Round up
$42.08
Answer:
find the final price by subtracting 10% from the sale price of $46.75 which is $4.68 making the final price $42.07
Geometry question. Please help!!!
Answer:
C
Step-by-step explanation:
In a standard Normal distribution, which z-score represents the 20th percentile?
Find the z-table here.
-1.41
-0.84
0.84
1.41
Answer: B
Step-by-step explanation:
e2020
PLZ HELPPPPP WILL GIVE BRAINLIEST AND NO WRONG ANSWER PLZ
Answer:
D
Step-by-step explanation:
Answer:
D.
Step-by-step explanation:
D. because it has a proper domain and range and no other answer has correct domain/range. Therefore, D is the answer.
What number is one tenth of the number 0.9
Answer:
0.09
Step-by-step explanation:
First off, we can write 0.9 as a fraction. Reading this, we would say "nine tenths"; this means the number in fraction form is 9/10.
The word "of" in mathematics means we multiply. Thus when we take 1/10 "of" 9/10, we multiply the two:
1/10(9/10)
To multiply fractions, multiply the numerators and multiply the denominators:
1/10(9/10) = (1*9)/(10*10) = 9/100
Converting this back to a decimal, we read 9/100 as "nine one-hundredths"; this means decimal form is 0.09.
Help? Only right answers get thanks and five stars.
Emily claims that a tree height of 43 inches is an outlier for the distribution. Based on the 1.5x IQR rule for outliers, is there evidence to support the claim?
Given:
Emily claims that a tree height of 43 inches is an outlier for the distribution.
To find:
Evidence to support the claim if any.
Solution:
The starting and the end of the box in box plot are first and third quartile respectively.
From the given box plot it is clear that, [tex]Q_1=34[/tex] and [tex]Q_3=38[/tex].
[tex]IQR=Q_3-Q_1[/tex]
[tex]IQR=38-34[/tex]
[tex]IQR=4[/tex]
According to 1.5x IQR rule for outliers, all the data values lies outside the interval [tex][Q_1-1.5\times IQR,Q_3+1.5\times IQR][/tex] are outliers.
Now,
[tex]Q_3+1.5\times IQR=38+1.5(4)[/tex]
[tex]Q_3+1.5\times IQR=38+6[/tex]
[tex]Q_3+1.5\times IQR=44[/tex]
We know that, 43<44.
Since, 43 is not greater than [tex]Q_3+1.5\times IQR[/tex], therefore, 43 is not an outlier and there is no evidence to support the claim.
Therefore, the correct option is D.
whats the slope of -2,7 , 4,1
Answer:
-1
Step-by-step explanation:
slope = change of y/ change of x
here, 7-1 / -2-4 = 6/-6 = -1
Answer:
slope=1
Step-by-step explanation:
(-2,7), (4,1)
y2-y1=m 1-7 = -6 = 1
x2-x1. 4-(-2) 6
A chicken farm produces ideally 400,000 eggs per day but this total came very buy as many as 30,000 eggs what is the maximum and minimum expected production at the farm?
Answer:
400,000+30,000
430,000
400,000-30,000
370,000
Step-by-step explanation:
/O-O\ Help no fake answers
Answer:
I want to say it is the first one and the and the third one
Step-by-step explanation:
Answer:
a, d and e
Step-by-step explanation:
3.5%=3 1/2% of 20
3.5x100=0.035 of 20
3.5+3.5=7 (x2), then 20/2 will be 10
7% of 10
Juan is saving money for a new car. He has already saved $200 and plans to save $25 per week. This situation can be represented by the function f(x) = 200 + 25x, where x is the number of weeks. How much money has Juan saved after 8 weeks?
Answer:
400
Step-by-step explanation:
200 + 25(8)
200 + 200 = 400
Answer:
400
Step-by-step explanation:
25x8+200=200+200=400
Simplify. Round your answer to three decimal places.
1
2
·
2
3
+ 0.345
Answer:
1/2 times 2/3 equals 0.333333....
that plus 0.345 equals 0.678
Step-by-step explanation:
2 and 1 over 4 divided by 4 and 3 over 8?
Answer:
42
43
Step-by-step explanation:
that just the answer
What sybol is true for this equation? 9/5 - 7/5
<
>
=
Answer:
I think it's 9/5 > 7/5
Step-by-step explanation:
Well, because 9 has more value than 7. Please don't be mad if I'm wrong.
Answer:
9\5 IS GREATER THAN 7\5
Step-by-step explanation:
WELL IF YOU LOOK YOU WILL SEE NINE IS GREATER THAN 7 EASY MATH HOPE I COULD HELP. PLEAAE MARK BRAINLYIEST
ALGEBRA Evaluate the expression if x = –8, y = 7, and z = –11.
x – 7
Answer:
-15
Step-by-step explanation:
x= -8 (-8)-7= -15
Round 2,345,4285 to the nearest tenth
order these numbers from least to greatest, 4.509, 4.58, 4.09, 4.58258
Answer:
4.09,4.509,4.58,4.58258
Step-by-step explanation:
Suppose a dress originally cost $58.00. It is on sale for 25% off. Then a 6% sales tax is added to the discounted price. How much does the customer pay???
i asked this question 3 times.. no one respond... PLEASE help I have a quiz
Answer:
29.00
Step-by-step explanation:
Evaluate..................
Answer:
Step-by-step explanation:
How much more is a 6% pay increase when your current annual salary is $62,900
Answer:
$3744
Step-by-step explanation:
The sum of two consecutive integers is
−29.
Find the numbers.