A textbook store sold a combined total of 272 biology and math textbooks in a week. The number of biology textbooks sold was three times the number of math textbooks sold. How many textbooks of each type were sold?
Number of biology textbooks sold: ?

Number of math textbooks sold: ?

biobooks = 204

mathbooks = 68

Step-by-step explanation:

the bio textbooks make up 3 parts

the math textbooks make up 1 part

the denominator therefore is 4

so biobooks = 272 * 3/4

and mathbooks = 272 * 1/4 (272 : 2 : 2)

note that calculating the mathbooks 1st is easier, bc you can then multiply by 3 to get the biobooks.

add both numbers up to proof that the sum is 272

(would really appreciate the brainliest)

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

you already gave the answer

step-by-step explanation: