How many math books and English books did Nicole purchase?
1 answer:
Create a system if equations to solve this. First equation: 25m + 24e = 220 Second equation: m + e = 9 Then you must solve the second equation for a variable. Change m + e = 9 to e = 9 - m. Then substitute (9 - m) for e in the first equation. So 25m +24e = 220 becomes 25m + 24(9 - m) = 220. Now you can solve the first equation because the only variable in it is m. 25m + 24(9 - m) = 220 (Original equation) 25m + 216 - 24m = 220 (Distribute) m + 216 = 220 (Combine like terms) m = 4 (Simplify) Now plug in 4 for m in the second equation. m + e = 9 (Original equation) (4) + e = 9 (Substitute) e = 5 (Simplify) m represents Math Books and e represents English Books, so Nicole purchased 4 Math Books and 5 English Books.
You might be interested in
Answer:
29 hours
Step-by-step explanation:
If he earned $404.70 per 19 hours, you do 404.70/19 to figure out the amount he earns per hour. 404.7/19 is 21.3. He earns $21.3 per hour. to solve, you find how many times 21.3 goes into 617.7 or 617.7/21.3. That is 29. He needs to work 29 hours to earn $617.70
Answer:
The integers are 52 and 54
Step-by-step explanation:
x = first even integer
x + 2 = next integer that is even
x + x + 2 = 106
2x + 2 = 106
2x = 104
x = 52
x + 2 = 54
Step-by-step explanation:
Step 1: Multiply the 2 with the X to get 2X.
Step 2: multiply the 2 with the 4 and get 8
Step 3: your answer is 2X+8
I think it’s b hope it helps