Answer:
44
Step-by-step explanation:
Answer: 44
Step-by-step explanation:
[5 - 3(8/4)] + (5^5/10^2)+(20-6.25) = 44
Use substitution to determine whether the system below has no solution, infinitely many solutions or one solution.
15x + 5y = 20
y = 8 - 3x
Answer:
No solution
y= -3x +4
y= -3x +8
Arbitron Media Research Inc. conducted a study of the iPod listening habits of men and women. One facet of the study involved the mean listening time. It was discovered that the mean listening time for a sample of 10 men was 37 minutes per day. The standard deviation was 13 minutes per day. The mean listening time for a sample of 16 women was also 37 minutes, but the standard deviation of the sample was 14 minutes. At the 0.10 significance level, can we conclude that there is a difference in the variation in the listening times for men and women?
Answer:
We reject H0; that there is significant evidence to support that there is difference in the variation in the listening times for men and women
Step-by-step explanation:
Given that :
n1 = 10 ; s1 = 13 ; n2 = 16 ; s2 = 14 ; α = 0.1
Null : H0 : σ1² = σ2²
Alternative : H1 : σ1² ≠ σ2²
To compute the test statistic ; using the Ftest:
F-test = σ2² / σ1² = 14² / 13²
F-test = 14²/13² = 196 / 169 = 1.1597
Decision region :
Reject Null, H0 ; if
Ftest < Fcritical
F critical at:
At α/2 = 0.10/2 = 0.05
df_numerator = 16 - 1 = 15
df_denominator = 10 - 1 = 9
Using F critical calculator :
Fcritical = 3.006
1.1597 < 3.006
Since, Ftest is lesser than Fcritical, then we reject H0
44 = t - 10; 52, 53, 54
Find the percent of change. Round to the nearest whole percent & state whether the percent of change is an increase or a decrease.
If the regular price of a new bike is $115 and the sale price is $90, find the percent of decrease to the nearest whole percent.
Answer: 22% decrease
Step-by-step explanation:
Old price - sale price = 115 - 90 = 25
25/115 x 100 = 21.7% rounded to 22%
Can anyone help on this???
Answer:
x=12
y=12√3
Step-by-step explanation:
I've attached the same picture from before because it gives you the answer
we can see that the hyptonouse is equal to 2a which means that
2a=24
which means that a=12
We see that the side opposite to the 30 is equal to a so
x=12
and the side opposite to 60 is a√3
or
12√3
Question 15
An item that originally costs $80 is discounted by 10%. Choose all the expressions that can
be used to find the new discounted price. *
800.90)
800.10)
80 - 80(0.10)
80(1 -0.10)
80(1 + 0.10)
Billy can run 2100 meters in 15 minutes. At this rate, how many meters can he run in 120 minutes?
Group of answer choices
A)3333.33
B)55.56
C)140
D)730.77
E)92250.00
F)17.5
G)2005.00
H)16800
I)8400
Answer:
The answer is C)140
Which number is less than 3.58?
Answer:
3 is les than 3.58
Step-by-step explanation:
3 is less than 3.58
Answer:
3.57
Step-by-step explanation:
Luke and Seth each need to buy the same amount of fencing for their gardens. While Seth's garden is square in shape, Luke's garden is rectangular with the length 3 feet longer than Seth's. Luke's width is half of the length of his own garden. How much fencing did each buy?
A = Lw (Area equal length times width)
A = 48 (the garden's area is 48 ft2)
L = w + 2
We have values for our variables, so let's plug them in:
48 = w(w + 2)
Distribute:
48 = w2 + 2w
Subtract 48 from both sides:
0 = w2 + 2w - 48
AS you can see, we now have a quadratic. From here we need:
m + n = 2 and
m * n = -48
When we break up the quadratic into (w + m)(w + n)
48 is an even number divisible by 3, so it'll be also be divisible by 6:
48 / 6 = 8
8 + (-6) = 2
8 * -6 = -48, so:
0 = (w + 8)(w - 6) →→ 0 = w + 8, or 0 = w - 6
w = -8 or 6
We can't have a negative width, so it cannot be -8, therefore, the width is 6 ft. I'm sure you can find the length from here.
(i hope this is right)
Lyn either travels by bus or walks
when she visits the shops.
The probability that she catches
the bus To the shops is 0.2
The probability that she catches
the bus FROM the shops is 0.6
0.2
Walk
a) Complete the tree diagram.
b) Show that the probability that Lyn
walks at least one way is 0.88.
I’m forced to write an explanation, sorry for the useless text
The probability tree has been drawn below and the probability that Lyn
walks at least one way is 0.88 is when she reaches the shop by bus and from the bus, she walks.
What is probability?The probability of an event occurring is defined by probability.
Do not take underestimate probability it has several uses in daily life whether forecasts like that.
As per the given probability tree,
(a)
The probability in branches adds to 1 thus,
0.2 + probability that she walks to the shop = 1
Probability that she walks to the shop = 1 - 0.2 = 0.8
The probability in the same branches multiplies as,
The probability that she took a bus to the shop x from the bus she again took the bus.
Similarly, the tree diagram has been drawn below.
(b)
The probability is 0.88 lies in that Lyn walks at least one way 0.88 is when she reaches the shop by bus and from the bus, she walks.
Hence "walks at least one way is 0.88 is when she reaches the shop by bus and from the bus, she walks".
For more information about the probability,
brainly.com/question/11234923
#SPJ2
What is the volume of the rectangular prism?
512 in 3
64 in 3
256 in 3
128 in 3
Answer and Step-by-step explanation:
First, we need to know what the formula is for finding the volume of a rectangular prism.
The volume formula for a rectangular prism is as follows:
V = b (base) * w (width) * h (height)
Essentially, we just take the height, base, and width, and multiply them together. Order doesn't matter here.
So, let's multiply 8 by 8 by 4.
8 * 8 * 4 = V
64 * 4 = V
256 = V
256 [tex]in^{3}[/tex] is the answer.
#teamtrees #PAW (Plant and Water)
Help please! Thank you!!
Answer:
alternate exterior angle is answer
Answer:
Angle 2 and angle 8 are alternative exterior angles
Your bill at a restaurant was for $36. You want to leave a 15 % tip. What would the tip amount be?
$5.40
$6.20
$4.17
$2.40
Pls help fast!
Solve the equation.
3x^3+x^2=x^2
Answer:
I believe the correct answer is
X=0
45 Tyrone is converting 50 to a percent. Which method should he use to find the percent? Divide the numerator and denominator of the fraction by 2. Subtract 40 from the numerator and denominator of the fraction. Multiply the numerator and the denominator of the fraction by 2. Add 50 to the numerator and denominator of the fraction.
Answer:
3. multiply the numerator and denominator of the fraction by 2
Step-by-step explanation:
Multiplying the numerator and denominator by 2 is like multiplying the fraction by 2/2. 2/2 is one so it doesn't change the value.
Answer:
❌Divide the numerator and denominator of the fraction by 2.
❌Subtract 40 from the numerator and denominator of the fraction.
✔️Multiply the numerator and the denominator of the fraction by 2.
❌Add 50 to the numerator and denominator of the fraction.
An art teacher orders 15 cases of crayons.
48 boxes of crayons in it. How many boxes of crayons
does the art teacher get?
Answer:
720 boxes of crayons
Step-by-step explanation:
15 x 48 = 720
The following table shows the price and quantities which are consumed by the
house hold.
Product 2017 2018
Unit price
(Rs,)
Quantity Unit price
(Rs,)
Quantity
A 80 120 110 130
B 240 60 250 70
C 50 100 60 180
D 80 50 120 75
Calculate the price relate for the A,B,C and separately
Answer:b
Step-by-step explanation:
2(10) + 2(x – 4) can someone help me with this problem
Answer:
2 x + 12
Step-by-step explanation:
Answer:
2x+12
Step-by-step explanation:
Multiply 2 by 10, and multiply 2 by x and -4 since x and -4 are in the parenthesis you just have to multiply them both by 2 separately.
2(10) + 2(x – 4)
20+2x-8
Subtract 20 by 8
2x+20-8
Finally, you have your answer!
2x+12
Given g(x)
=
3x + 6
2
and g(x) = 15, solve for x.
Answer:
=x?15
Step-by-step explanation:
Answer:
hhhhh
Step-by-step explanation:
Plzzzzz helppppppppppppppp
Answer:
i just want my points.....
Step-by-step explanation:
a recipe need 3/4 cup of water for every 2 cups of flour. If you plan to use 6 cups of flour, how much water will you need?
Answer:
8 cups of flour
1 3/4 cups of water
hope it helped!
Please Help Me ASAP.
Answer:
Identify the x-value in the ordered pair and plug it into the equation. When you simplify, if the y-value you get is the same as the y-value in the ordered pair, then that ordered pair is indeed a solution to the equation.
Step-by-step explanation:
You and 3 friends go to a concert. In how many different ways can you sit in the assigned seats? 06 ways O 12 ways 024 ways O 10 ways
Answer:
12 ways
Step-by-step explanation:
There are 99 males and 121 females participating in a marathon. What percent of the participants are female? Enter your answer in the box
Answer:
55.
Step-by-step explanation:
121 is what percent of 220? = 55.
Graph the line.
y=4/3x
Answer:
Start from (0,0) and do rise over run
Step-by-step explanation:
Rise 4
Run 3
For the III (3rd) quadrant use
Rise -4
Run -3
Kevin is fertilizing his garden. The garden is in the shape of a rectangle. Its length is 15 feet and its width is 12 feet. Suppose each bag of fertilizer covers 20
square feet. How many bags will he need to cover the garden?
Answer:
9 bags.
Step-by-step explanation:
If you find the area of the garden ( 15 times 12) and divide the area by 20 (the size of one bag) you get 9 bags.
Answer:Kevin will need 9 bags
Step-by-step explanation:
15 x 12
=180
180 by 20
= 9
If x = -3, find
pls answer
Answer:
x² - 1 = 8
Step-by-step explanation:
Given the following algebraic expression;
x² - 1
When x = -3
Substituting the value of x, we have;
x² - 1 = (-3)² - 1
x² - 1 = 9 - 1
x² - 1 = 8
Method II.
x² - 1 = (x - 1)(x + 1)
Substituting the value of x, we have;
x² - 1 = (-3 - 1)(-3+ 1)
x² - 1 = -4(-2)
x² - 1 = 8
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Peter goes for a walk.
He walks 15 miles in 6 hours.
(a) Work out Peter’s average speed.
Give your answer in miles per hour.
Answer:
2.5 mph
Step-by-step explanation:
Peter walks 2.5 miles per hour
If he walks 15 miles in 6 hours then divide 15 by 6
15 divided by 6 is 2.5 so every hour peter walks 2.5 miles or 2 1/2
the rule for the distributive property is
Step-by-step explanation:
The Distributive Property is easy to remember, if you recall that "multiplication distributes over addition". Formally, they write this property as "a(b + c) = ab + ac". In numbers, this means, for example, that 2(3 + 4) = 2×3 + 2×4.