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MATH SOLVE
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Which are points on the graph of y = 1.5+ [x]? Select three options(-4.5, -2.5)(-0.8,0.5)(7.9, 9.5)(4.5, 6)(1.3, 3.5)
General
4 months ago
Given triangle ABC with sides AB = 3x + 4 , BC = 2x + 5 , and AC = 4x , determine the values of x such that triangle ABC exists
General
4 months ago
A stadium staircase with 150 steps is numbered from 1 to 150. Jan starts on step 130 and steps down to step number 127, then to step number 124, and continues downward to step 13 stepping only on every third step. Jen starts on step number 3 and steps up to step number 7, then to step number 11, and continues upward to step 139 stepping only on every fourth step. How many steps were stepped on by both Jan and Jen (not necessarily at the same time)?
General
4 months ago
Let a and b be real constants such that \[x^4 ax^3 3x^2 bx 1 \ge 0\]for all real numbers x. Find the largest possible value of a^2 b^2.
General
4 months ago
Martha wrote an example of a quadratic function for a homework assignment. The function she wrote is shown. f(x) = 5x3 + 2x2 + 7x – 3 What possible changes can Martha make to correct her homework assignment? Select two options. The first term, 5x3, can be eliminated. The exponent on the first term, 5x3, can be changed to a 2 and then combined with the second term, 2x2.The exponent on the second term, 2x2, can be changed to a 3 and then combined with the first term, 5x3. The constant, –3, can be changed to a variable. The 7x can be eliminated.
General
4 months ago
Aâ 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her leftâ hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among 283 âtrials, the touch therapists were correct 124 times. Use a 0.10 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists areâ effective?
General
4 months ago
In △ABC, m∠A=23°, a=10, and b=13. Find c to the nearest tenth.
General
4 months ago
The National Center for Education would like to estimate the average student debt for the class of 2013 for the state of Ohio with a 95% con dence interval and a margin of error within plus or minus $2,000. Assuming the standard deviation for student debt in this state is $9,000, the required sample size is:
General
4 months ago
A tire company has developed a new type of steel-belted radial tire. Extensive testing indicates the population of mileages obtained by all tires of this new type is normally distributed with a mean of 40,000 miles and a standard deviation of 4,000 miles. The company wishes to offer a guarantee providing a discount on a new set of tires if the original tires purchased qualify the guarantee mileage. What should the guaranteed mileage be if the tire company desires that no more than 2 percent of the tires will fail to meet the guaranteed mileage? (2 points)
General
4 months ago
Match the expressions to their solutions or equivalents.
General
4 months ago
A retail store estimates that weekly sales s and weekly advertising costs x (both in dollars) are related by s equals 40 comma 000 minus 30 comma 000 e Superscript negative 0.0004 xs=40,000−30,000e−0.0004x. The current weekly advertising costs are$2 comma 5002,500, and these costs are increasing at a rate of$400400 per week. Find the current rate of change of sales. The current rate of change of sales is $nothing per week. (Round to the nearest dollar as needed.)
General
4 months ago
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 66 students using Method 1 produces a testing average of 54.9. A sample of 110 students using Method 2 produces a testing average of 85.9. Assume that the population standard deviation for Method 1 is 6.04, while the population standard deviation for Method 2 is 16.44. Determine the 99% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2. Step 1 of 3 : Find the point estimate for the true difference between the population means.
General
4 months ago
Consider a sampling distribution with p equals 0.12 and samples of size n each. Using the appropriate formulas, find the mean and the standard deviation of the sampling distribution of the sample proportion. (a) For a random sample of size n equals 5000. (b) For a random sample of size n equals 1000. (c) For a random sample of size n equals 500.
General
4 months ago
Andrew stays in shape by running various distances throughout the week. On monday he ran 3 miles on tuesday he ran 4.6 on thrusday 6.76 and on saturday he runs 4.8 miles. What is the mean distance that andrew runs per day
General
4 months ago
Keenan currently does a total of 888 pushups each day. He plans to increase the number of pushups he does each day by 222 pushups until he is doing a total of 303030 pushups each day.Which equation can we use to determine xxx, the number of days that it will take Keenan to reach his goal?Choose 1 answer:Choose 1 answer:(Choice A)A8+2x=308+2x=308, plus, 2, x, equals, 30(Choice B)B(8+2)x=30(8+2)x=30left parenthesis, 8, plus, 2, right parenthesis, x, equals, 30(Choice C)C8(2+x)=308(2+x)=308, left parenthesis, 2, plus, x, right parenthesis, equals, 30(Choice D)D8+2+x=308+2+x=30
General
4 months ago
A sports club needs to raise at least $500 by selling chocolate bars for $2.50 each. Sebastian wants to know how many chocolate bars, c, the sports club must sell in order to reach its goal.
General
4 months ago
Which equation shows how the relationship between the circumference and the diameter of a circle is equivalent to π? A) π = dC B) π = d C C) π = C d D) π = 1 dC
General
4 months ago
Select steps that could be used to solve the equation 1 + 3x = -x + 4.add x, subtract 4, divide by 4subtract 1, add x, divide by 4subtract 3x, subtract 4, divide by -4add x, subtract 1, divide by 4subtract 3x, subtract 4, divide by 4
General
4 months ago
Fiona sells bracelets for $24 each. The initial cost of supplies is $134. What function equation represents her profit from selling n bracelets? A) p(n) = 24n - 134 b) p(n) = 134n - 24 C) p(n) = 24n + 134 D) p(n) = 134n + 24 I think it’s D I’m not sure
General
4 months ago
Consider circle Y with radius 3 m and central angle XYZ measuring 70°. What is the approximate length of minor arc XZ? Round to the nearest tenth of a meter. 1.8 meters 3.7 meters 15.2 meters 18.8 meters
General
4 months ago
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