Write an integer subtraction expression that equals -4
a. includes a negative number and a positive number.
b. includes three different integers.
c. includes four different integers.
d. includes the number -7.
e. includes two odd numbers with at least one of them being negative.
f. includes a number divisible by 7 and a number divisible by 2.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?