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Elimination using multiplication What is the best answer? 2x+y=0 5x+3y=2
General
2 months ago
d= number of dollarsn= number of ouncesDrag each table and equation to the unit rate it matches.
General
2 months ago
Your local pizza chain claims that the delivery time of their pizzas is normally distributed with a mean of 30 minutes and standard deviation of 10 minutes. Twenty of your friends in different locations order pizzas and the average delivery time is 42 minutes with standard deviation of 10 minutes. Compute a one-sample t statistic. Do you have a reason to disbelieve the chain’s claim?
General
2 months ago
An NHANES report gives data for 652 women aged 20 – 29 20–29 years. The BMI of these 652 652 women was ¯ x = 26.5 x¯= 26.5 . On the basis of this sample, we want to estimate the BMI μ μ in the population of all 20.6 20.6 million women in this age group. We treated these data as an SRS from a Normally distributed population with standard deviation σ = 7.2 σ=7.2 . Give three confidence intervals for the mean BMI μ in this population, using 90%, 95%, and 99% confidence. Enter the lower and upper bound for the 90% confidence interval.
General
2 months ago
The following observations were made on fracture toughness of a base plate of 18% nickel maraging steel (in ksi in. , given in increasing order)]: 65.1 71.9 72.7 73.1 73.4 73.5 75.5 75.7 75.8 76.1 76.2 76.2 77.0 77.9 78.3 79.6 79.7 79.9 80.1 82.2 83.6 93.8 Calculate a 99% CI for the standard deviation of the fracture toughness distribution. (Round your answers to one decimal place.) , ksi in Is this interval valid whatever the nature of the distribution? Explain. The interval is always valid. The distribution needs to be skewed to the right. The distribution needs to be approximately uniform. The distribution needs to be approximately normal.
General
2 months ago
If there are 5280 feet in a mile and 3600 seconds in an hour then a speed of 26 feet per second is closest to which of the following
General
2 months ago
an algebra teacher drove by a farmyard full of chickens and pigs.the teacher happened to notice that there were a totals of 100 heads and 270 legs. how many chickens were there? how many pigs were there ?
General
2 months ago
A triangle has side lengths measuring 20 cm, 5 cm, and n cm. Which describes the possible values of n?551515
General
2 months ago
Angelina has a collection of nickels and dimes worth $4.65. If she has 70 nickels and dimes, how many of each does she have?
General
2 months ago
Will, Sue and Micah went to dinner. Will paid 1/4 of the bill. Micah and Sue paid in the ratio of 1:3. If Sue paid $15 more than Will, how much did dinner cost in total?
General
2 months ago
In the Gregorian calendar, every year which is divisible by $4$ is a leap year, except for years which are divisible by $100$; those years are only leap years if they're divisible by $400$. (This may seem complicated, but the calendar is carefully designed to keep the average number of days per year very close to the number of days in one complete orbit of the Earth.) Assuming we keep using the Gregorian calendar, how many leap years will there be between $2001$ and $2999$?
General
2 months ago
three times the larger of two numbers is equal to four times the smaller. the sum of the numbers is 21 find the numbers
General
2 months ago
BRAINLIEST ANSWER!!What is the median of the data represented by the box plot?Enter your answer in the box.
General
2 months ago
From a point on a circle, two perpendicular chords are drawn. One is 6 cm from the center and the other one is 3 cm from the center. Find the lengths of these chords.
General
2 months ago
What is the angle in both radians and degrees determined by an arc of length 2pi meters on a circle of radius 8 meters?
General
2 months ago
Jamal draws triangle XYZ. If angle X=46 degrees, XZ = 10 degrees, and YZ=8 degrees, what is the approximate length of XY?
General
2 months ago
what is the solution of (2/x-1)>(7/x+1)
General
2 months ago
A spherical tank has a radius of 6 yards. It is filled with a liquid the cost $7.15 per cubic yard.What is the total volume of liquid in the tank?Use 3.14 for pi and round to the nearest cent
General
2 months ago
On a vacation in Puerto Rico rose jumped off a cliff into a river in El Yunque go forest reserve her height as a function of time could be modeled by the function h(t) = -16tequals -16t ^2 + 16t + 480, where T is the time after jumping in seconds and H is the height in feet how many seconds did it take Rose to hit the water
General
2 months ago
A particle moves along a circular path with radius 3 centimeters. The particle has an angular velocity of 3π/4 radians per second. What is the length of the arc, in centimeters, generated after 5 seconds? Round your answer to the nearest tenth.
General
2 months ago
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