Answer:
12 pages per minutes
Step-by-step explanation:
36 pages in 3 minutes, so each minutes can print 12 pages
And 108 pages in 9 minutes, which is still 12 pages
So 12 pages per minute
Answer:
a= -2 and b=3
Step-by-step explanation:
Step 1) Solve the first equation for a:
a + 3b = 7
a + 3b - 3b = 7 - 3b
a + 0 = 7 - 3b
a = 7 - 3b
Step 2) Substitute(7 - 3b) for a in a second equation and solve for b:
2a = b - 7 becomes:
2(7 - 3b) = b-7
(2 multi.7) - (2 multi.3b)= b-7
14 - 6b = b - 7
14 + 7 - 6b + 6b = b + 6b = b + 6b - 7 +7
21 - 0 = 1b + 6b - 0
21=(1 + 6)b
21 = 7b
21
/7 = 7b/7
3 = 7b/7
3 = b
b = 3
Step 3) Substitute 3 for b in the solution to the first equation at the end of Step 1 and calculate a
:
a = 7 - 3b becomes:
a = 7 − (
3 ⋅ 3)
a = 7 −
9
a = −
2
Answer:
2350 is 88.68% of 2650.
Step-by-step explanation:
2350/2650
hopefully, i'm right :)
Answer: 20/x
Step-by-step explanation:
Answer:
300
Step-by-step explanation:
40% = 0.40
420/1.4 = 300
To check:
300 * 0.40 = 120
120 + 300 = 420
