Answer:
x + 12 ≤ 20 x=8
Step-by-step explanation:
Since Larissa is able to use it up for 20 hours and she has been using it for 12 hours now so add 12 with 12 and 20 with 12 then subtract the sum from the added numbers and you will get 8
So Larissa has 8 hours left on her watch before it needs to charge
An investment website can tell what devices are used to access the site. The site managers wonder whether they should enhance the facilities for trading via "smart phones" therefore they want to estimate the proportion of users who access the site that way. They draw a random sample of 200 investors from their customers. Suppose that the true proportion of smart phone users in 36%. What is the probability that the sample proportion is between 0.30 and 0.40? Hint: You'll need to find one z-score for 0.30 and another for 0.40. Then find the area between the two z-scores.
Answer:
0.8418
Step-by-step explanation:
We have p = 0.36
Sample size = 200
We have to find the standard error of proportion
= √p(1-p)/n
= √0.36(1-0.36)/200
= 0.034
P(0.30<p^0.40)
= 0.30-0.36/0.034 = -1.76,
0.40-0.36/0.034 = 1.18
P(-1.76<z<1.18)
When we go to the standard normal distribution table
P(z<1.18) = 0.8810
P(z<-1.76) = 0.0392
0.8810 - 0.0392
= 0.8418
This is the probability of the sample proportion being between 0.30 and 0.40
which expression is equivalent to -0.25(12 y + 4)
a. 11.75 y + 4
b. -3 y -1
c. 11.75 y + 3.75
d. -3 y -4
Answer:
The answer is B
Step-by-step explanation:
-1/4(12y) -1/4(4)
= -3y - 1
What is 24.5 as a fraction.
What is the name of these lines?
Answer:
perpendicular lines
Step-by-step explanation:
Using the following sequence, decide if it is arithmetic or geometric, and what the common difference or common ratio is.
10, 13, 16, 19, ...
Answer:
Arithmetic
Step-by-step explanation:
Since arithmetic means adding or subtracting a common difference, we see the differences in each term. We notices the differences is 3, so the common difference is 3.
Write an equivalent form of the exponential
expression:
(x4)3
Answer:
x¹²
Step-by-step explanation:
You need to indicate which terms are exponents. For example, (x⁴)³ can be written as (x^4)^3.
(x⁴)³ = x⁴*³ = x¹²
How many feet are in 28 miles
Answer:
147840 feet
Step-by-step explanation:
I looked it up XD
HERE ARE 2 QUESTIONS PLS HELP ASAP ITS MATH
______________________________
6.) Solve each problem:[tex]3[/tex] ÷ [tex]8=0.375[/tex][tex]4[/tex] ÷ [tex]12=0.333333333[/tex][tex]2[/tex] ÷ [tex]6=0.333333333[/tex][tex]10[/tex] ÷ [tex]30=0.333333333[/tex]- So looking at this most of them equal 0.333333333, which in fraction form is [tex]\frac{1}{3}[/tex], so 3 ÷ 8 must be the answer.
7.) Solve each problem: [tex]25[/tex] ÷ [tex]8=3.125[/tex][tex]\frac{25}{8}=3.125[/tex][tex]3\frac{1}{8}=\frac{25}{8}=3.125[/tex][tex]8[/tex] ÷ [tex]25=0.32[/tex]- So looking at each problem answer, most of them are 3.125, except for 8 ÷ 25.
______________________________
50 POINTS
A salesperson will earn a commission equal to 1/32 of the total sales. What is the commission earned on sales totaling $24,000
Two trains, Train A and Train B, weigh a total of 493 tons. Train A is heavier than Train B. The difference of their weights is 297. What is the weight of Train A?
Answer: Area of the floor or ceiling: Multiply the length by the width (10 feet x 12 ... feet (10 feet wide x 8 feet high) and the other is 96 square feet (12 feet x 8 feet). ... divide the total square footage of the floor by 9 (120 square feet / 9 ... To convert an area from square feet into square inches, simply multiply by 144.
Step-by-step explanation:
Answer:
392
Step-by-step explanation:
[tex] = 297 - 493 \\ = 196 \\ =19 6 + 196 \\ = 392 \\ \\ this \: is \: ur \: answer \: as \: weigh \: a \: is \: greater \: then \: weigh \: \: b.[/tex]
Answer Statement:As weigh A is greater then weigh B so the Total weigh of A and B is 493 then
weigh B is :196
weigh A is : 392
Personal Note:please mark this answer as a brainliest answer pls.
9.5 9.375 9.75 9.125 from greatest to least
Step-by-step explanation:
9.125<9.375<9.5<9.75
A medical device company knows that 11% of patients experience injection-site reactions with the current needle. If 4 people receive injections with this type of needle, what is the probability that none of the 4 people get an injection-site reaction? 0.0001 0.3726 0.4400 0.6274
Answer: 0.6274
Step-by-step explanation:
Given: The proportion of patients experience injection-site reactions with the current needle : p=0.11
Sample size : n= 4
Let x be a binomial random variable that represents the people get an injection-site reaction.
Binomial probability formula: [tex]P(X=x)= ^nC_x p^x(1-p)^{n-x}[/tex]
The required probability : P(x=0)
[tex]=\ ^4C_0(0.11)^0(1-0.11)^4\\\\=(1)(1)(0.89)^4\\\\=0.62742241\\\approx0.6274[/tex]
Hence, the probability that none of the 4 people get an injection-site reaction = 0.6274
The probability that none of the 4 people get an injection-site reaction would be 0.6274.
How to find that a given condition can be modelled by binomial distribution?Binomial distributions consists of n independent Bernoulli trials.
Bernoulli trials are those trials which end up randomly either on success (with probability p) or on failures( with probability 1- p = q (say))
Suppose we have random variable X pertaining to binomial distribution with parameters n and p, then it is written as
[tex]X \sim B(n,p)[/tex]
The probability that out of n trials, there'd be x successes is given by
[tex]P(X =x) = \: ^nC_xp^x(1-p)^{n-x}[/tex]
A medical device company knows that 11% of patients experience injection-site reactions with the current needle.
If 4 people receive injections with this type of needle.
The proportion of patients who experience injection-site reactions with the current needle
p=0.11
Sample size : n= 4
Let a binomial random variable be x that represents the people who get an injection-site reaction.
Binomial probability formula:
P(X = x) = [tex]^nC_x p^x(1-p)^{n-x}[/tex]
The required probability :
P(x=0)
[tex]=\ ^4C_0(0.11)^0(1-0.11)^4\\\\=(1)(1)(0.89)^4\\\\=0.62742241\\\\\approx0.6274[/tex]
Hence, the probability that none of the 4 people get an injection-site reaction would be 0.6274.
Learn more about binomial distribution here:
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Leah made 10 gift boxes of cookies for her friends. Each gift box holds 8 cookies. She had enough cookies to make 3 more full gift boxes. How many cookies did she make?
Ben wants to buy a baseball cap that cost $24.50. The state sales tax is 8%, or 0.08. How much will he pay in sales tax
Answer:
the answer shouuld be $1.96
Step-by-step explanation:
24.50x.08= 1.96
Answer:
1.96 in sales tax
Step-by-step explanation:
to get percent of a number just multiply the percent in decimal form by the number for example 8% --> .08
In Gotham city the sales tax is 7.5%. What is the total tax collected (tax ONLY) on Batman’s purchase of $180 towards his new superhero suit?
Which equation has no solution?
O |-x - 3= 5
O 2x – 1] = 0
015 - 3x = -8
o 1-X + 9 = 0
Can someone help me with this question
Answer:
They bought 6 bags of snack mix and 5 bottles of water
Step-by-step explanation:
Solve the system by elimination please help me
Answer:
x = 3 and y = 7
Step-by-step explanation:
2x + y = 13
+ x - y = -4 (adding both equations)
3x - 0y = 9
3x = 9
x = 9/3
x = 3
now substituting
x - y = -4
3 - y = -4
- y = -4 - 3
- y = -7
y = 7 (the negative sign on both sides get canceled)
Therefore,
x = 3 and y = 7
Happy to help :)
50.) Find the value of b so that 330_b = 226_b+5
URGENT
Step-by-step explanation:
make equation and find the value
Which ratios are equal to 64 when the scale factor is 8? Select all that apply.
Group of answer choices
The scaled volume of a cube to the original volume.
The scaled surface area of a square pyramid to the original surface area.
The scaled volume of a rectangular prism to the original volume.
The scaled perimeter of an octagon to the original perimeter.
The scaled area of a triangle to the original area.
Answer:
The scaled surface area of a square pyramid to the original surface area.
The scaled area of a triangle to the original area.
Step-by-step explanation:
Suppose that we have a cube with sidelength M.
if we rescale this measure with a scale factor 8, we get 8*M
Now, if previously the area of one side was of order M^2, with the rescaled measure the area will be something like (8*M)^2 = 64*M^2
This means that the ratio of the surfaces/areas will be 64.
(and will be the same for a pyramid, a rectangle, etc)
Then the correct options will be the ones related to surfaces, that are:
The scaled surface area of a square pyramid to the original surface area.
The scaled area of a triangle to the original area.
How do I make both these equations into a elimination equation? Look at the pic I’m very confused!
Answer:
Step-by-step explanation:
c + a = 342 ..................... (1)
5c + 12a = 2550 ........... (2)
- 5 × (1) + (2)
7a = 840
a = 120
c = 342 - 120 = 222
An isometric transformation was applied to triangle
ABC.
What is the measure of angle A'?
O 45°
O 630
O 72°
O 989
B'
B
63°
2K
72°
45
C'
Α' Α
Answer:
A)
Step-by-step explanation:
A=63° i think im not sure
Answer:
72
Step-by-step explanation:
did the test
-2=2+v/4help me please
Answer:
The answer is v=0
Step-by-step explanation:
WILL GIVE BRAINLYEST
Answer:
The 3rd option 5(x+2y-3)
Step-by-step explanation:
If you use distributive property when you look at these answers you would see this:
Option 1: 5x-10y-15
Option 2: 5x+25y-15
Option 3: 5x+10y-15
Option 4: 5x+10y-75
And when you do this you see that option 3 matches!
I hope this helps, and have a great day! :)
correct 33.246 to 2 significant figures
The value of number after 2 significant figures is, 33
What is rounding off?Rounding numbers refers to changing a number's digits such that it approximates a value. The provided number is more simply represented by this value. For instance, 700,000 rather than 698,869 could be used to express a town's population.
Given that;
Correct the number 33.246 to 2 significant figures.
Now, we can check the first non-zero digit if rounding to one significant figure. look at the digit after the first non-zero digit if rounding to two significant figures.
Thus, The value of number after 2 significant figures is,
⇒ 33
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The price of a shirt is $20.50, but you have a coupon that lowers the price by 40%. What is the price of the shirt after using the coupon? *
Answer:
$12.30
Step-by-step explanation:
hope this helps!
Answer:
8
Step-by-step explanation:
Solve each system of linear equations by adding or subtracting. 3x + 4y = 15 3x - y = 30 Enter the solution as an ordered pair. The solution is
Answer:
( 9, − 3 )
Step-by-step explanation:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
x = 9 and y = − 3
what is the denominator for 2/3 ?
it is 3 hope this helped
Answer:
3
Step-by-step explanation:
John's family visited his grandmother over the weekend. The drive to her house took 2 hours at their usual speed. The trip took 15 minutes longer because traffic was bad and they had to drive 5 mph slower. How many miles away is Johns grandmother's house?
Let the normal speed = x mph
The way to his grandmothers they drove 2x miles
Return trip was 2.25(x-5)
Set those equal and solve for x:
2x = 2.25(x-5)
Simplify:
2x = 2.25x -11.25
Subtract 2.25x from both sides:
-0.25x = -11.25
Divide both sides by-0.25:
X = 45
The usual speed is 45 mph.
So now 2 hours at 45 mph = 90 miles to his grandmothers house
Answer:
90 miles
Step-by-step explanation:
We did this in class when we were going over the hw and decided to help. Sorry if I'm too late.
Sports
Movie
13
Yes
64 customers pay for satellite
television.
Basic
They all have the Basic package
for £26.40 per month.
Some also have
• the Sports package for £27.30 extra per month
the Movie package for £19 extra per month.
The frequency tree shows the number
of customers with each package.
64
In total, how much per month do
the 64 customers pay?
us
21
.
Yes
No
8
No
6
Yes
+
43
No
37
Total marks: 4
