Tina has some ants and worms. There are 20 more ants than worms. Altogether, there are 80 insects. Let a represent the number of ants and w represent the number of worms. The following system of equations represents this situation: a−20=w a+w=80 How many ants and worms does Tina have? Question solved general 5 months ago 4561
Which of the following statements are true? Select all that apply. The correlation coefficient, r , is equal to the number of data points that lie on the regression line divided by the total number of data points. The correlation coefficient gives us information about the number of outliers compared to the number of data points. The correlation coefficient is a unitless number and must always lie between –1.0 and +1.0, inclusive. The correlation coefficient, r , gives us information about the strength and direction of a linear relationship between any two variables. If r is the correlation between two variables x and y then -r is the correlation between y and x . The larger r is in absolute value, the stronger the relationship is between the two variables. Question solved general 5 months ago 5565
To construct the regular hexagon, the radius length AB is used to mark the vertices of the hexagon. Can this method be used to make any regular inscribed polygon, such as a square? Question solved general 5 months ago 2097
Nina has some money saved for a vacation she has planned. The vacation will cost a total of $1600. She will put $150 every week into her account to help pay for the vacation. She will hav enough money for the vacation in 8 weeks. If Nina was able to save $200 a week instead of $159 a week, how many fewer weeks would it take her to save money for the vacation Question solved general 5 months ago 9485
A circle has a radius of 6 centimeters.What is the area of the sector formed by a central angle measuring 2.4 radians?Enter your answer as a decimal. Question solved general 5 months ago 4704
From where Kiana is standing, she must look up at a 50° angle to see the top of a building. If she backs up 50 feet, she will need to look up at a 40° angle to see the top of the same building. Approximately how tall is the building? Question solved general 5 months ago 3004
(Help i am struggling with this problem) Jason and Mark have volunteered to fill water into the two dunk tanks for their scout field days. The amount of water in Jason's dunk tank is represented by the equation below, where W represents the amount of water, in gallons, x minutes after he began to fill. W= 2x+1The amount of water in Mark's dunk tank is represented by the equation below, where W represents the amount of water, in gallons, x minutes after he began to fill.W = 10x +5Using graphing technology, complete the statements.After _____minutes, the total amount of water in both dunk tanks will be the same.The total amount of water at that minute will be ____gallons. Question solved general 5 months ago 3861
Identify the values that create ordered pairs that are solutions to the equation 3x - 5y = 20.(5,y) (x,2) Question solved general 5 months ago 4348
The time it takes a spinner to stop completely is 12 seconds. If the spinner completes 6 revolutions in this time, what was the average angular velocity of the spinner, in radians per second, for the 12-second interval? Question solved general 5 months ago 6201
The surface area of a square pyramid is 85 square meters. The base length is 5 meters. What is the slant height? (With a clear answer please) Question solved general 5 months ago 9674
the perimeter of a rectangular campsite is 64m and its area is 207m^2. find the length and breadth of the campsite Question solved general 5 months ago 2070
The mean gas mileage for a hybrid car is 5656 miles per gallon. suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.23.2 miles per gallon. (a) what proportion of hybrids gets over 6161 miles per gallon? (b) what proportion of hybrids gets 5252 miles per gallon or less? left parenthesis c right parenthesis what(c) what proportion of hybrids gets between 5858 and 6161 miles per gallon? (d) what is the probability that a randomly selected hybrid gets less than 4646 miles per gallon? Question solved general 5 months ago 3498
Which is the equation of a line that has the same slope as y=2x+3 and passes through the point (4,0)?A. y=2x-8B. y=2xC. y=2x+4D. y=4x+3 Question solved general 5 months ago 2547
the length of this prism is multiplied by a scale factor of 1/2 to create rectangular prism B the volume of rectangular prism B is and I need work to Question solved general 5 months ago 1865
Two 6-sided dice are rolled at the same time. How many outcomes correspond to the event that the sum of the numbers is 5? Question solved general 5 months ago 1054
four numbers for my set 0 to 9 including 0 9 are used to create a personal identification number once a numbers use it cannot be reused how many possible outcomes begin with a 0 Question solved general 5 months ago 9712
It takes the first pipe 9 more hours to fill the pool than the first and the second pipes together and 7 less hours than it would take the second pipe if it was working alone. How long would it take to fill up the pool if both pipes were working together? Question solved general 5 months ago 1518
Four years ago Peter was three times as old as Sylvia, and in 5 years the sum of their ages will be 38 years. find their present ages Question solved general 5 months ago 8185
Which of these triangle pairs can be mapped to each other using two reflections? Question solved general 5 months ago 2960