3. Let a taco's cost be t and the cost of a glass of milk be m:t + m = 2.1, 2t + 3m = 5.15. This is choice D.
4. The only difference is that 4 has been added to the y-value, so the graph remains congruent, but it is moved up along the y-axis, which is choice H.
5. The total number of sandwiches sold is 500, so the fraction of ham-and-cheese sandwiches is 75/500 = 3/20. Since an entire circle is 360 degrees, the fraction for the ham-and-cheese sandwiches is (3/20)(360) = 54 degrees, which is choice C.
Time wind time speed divide by 3
Answer: Choice A (yes it is a function; one range value exists for each domain value)
Put another way, each x corresponds to exactly one output only. We do not have any repeat x values. Any input you specify, there is only one output. If for example we had the two points (3,5) and (3,7) then the input x = 3 leads to multiple outputs y = 5 and y = 7 at the same time. This example is a non-function because of this. In this case, we don't have such repeated x values so that is why we have a function.
Try graphing out the four points given. You'll notice you cannot draw a vertical line through more than one point. Therefore, this graph passes the vertical line test. The vertical line test is to see if it's possible to draw a vertical line through more than one point on the graph. If so, then the relation fails to be a function.
Answer: 875
Explaination: in order to find how many words he can read in 25 minutes we need to find how many words he can read in one minute then multiply that by the number of minutes he read. Like this
420÷ 12=35 35x25=875
