Let x be the speed of the slower plane, in km/h. Then the faster plane travels at x+40.
[2 hrs at speed x] + [(2 hrs - 1/2 hour) at speed (x+40)] = 2860(2x) + (1.5)(x+40) = 2860 solve for xx=800x+40=840
Plane 1 800 km/h
Plane 2 840 km/h
Answer:
last option
Step-by-step explanation:because 9x9 is 81 subtract 1 and you get 80 5x5=25-1=24 so that wont work 4x4=16-1=15 so that also wont work and 7x7=49-1=48 so -9 and 9 is the right answere
Answer:
C. 0.55
Step-by-step explanation:
The scatter plot shows that there is a positive correlation between variable x and variable y. This is because, the x and y variable seem to follow the same trend. That is, as x variable increases, y variable also increases. If a line of best fit is drawn, it would slope upwards, from left to our right.
Correlation coefficient (r) of any given data set plotted on a scatter plot, ranges from -1 to 1. The closer the value of "r" to either -1 or 1, the more clustered the data points are together in a line of best fit in a scatter plot.
Therefore, since the scatter plot given shows a positive relation between the x and y variables, whereby the data points seem to be less clustered and farther from each away from the line if best fit, if drawn, an estimate of "r" would not be closer to the value of 1.
Therefore, from the options given, C. 0.55 is the best estimate for r for the data shown in the scatter plot.
Hi dear,
If y is used to show ounce and x is used to show gram.
In order to find y we should add the value of x.
1 ounce is 28.35 gram
but it differs in this equation. So,
y = 0.04x
y = 0.04 (28.35)
y = 1.134
Answer:
1. 2.6
2. 29.1
3. 2490
4 3.4
Step-by-step explanation:
