Atextbook store sold a combined total of 464 physics and history textbooks in a week. the number of physics textbooks sold was three times the number of history textbooks sold. how many textbooks of each type were sold?

Let H = the number of history books sold in the store. Let P = the number of physics books.The problem says "three times as many physics books are sold", so we can set two equations in two variables that describe this scene. Equation 1 writes the second sentence; Equation 2 writes the third sentence

We then solve this two-by-two (two equations, two variables) system. It's easiest by substitution.

So, we sold 116 history books. We put our known number back into Equation 2 at the beginning, and find out that we sold 116 * 3, or 348, physics books.

Thus, the store sold 348 physics books and 116 history books.

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

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step-by-step explanation: