1. 4(2+3)−1(5-1)
8+12−1(5−1)
2. 8+12−1(5−1)
8x+12-5x+1
3. 8x+12-5x+1
8x+13-5x
4. 8x+13-5x
answer: 3x+13
Answer:
solve it like there's and equals sign
Step-by-step explanation:
2x-1=6
+1+1
<u>2x</u>=<u>7</u>
2 2
x=3.5
then put the greater than sign back
x>3.5
Answer:
.36
Step-by-step explanation:
36% -> 36/100 -> .36
Answer:
- 33 1/3 liters of 30%
- 16 2/3 liters of 45%
Step-by-step explanation:
Let x represent the liters of 45% solution needed. Then the amount of HCl in the mix is ...
0.45x +0.30(50 -x) = 0.35(50)
0.15x = 0.05(50) . . . . . simplify, subtract 0.30(50)
x = (0.05/0.15)(50) = 50/3 = 16 2/3 . . . liters of 45% HCl
33 1/3 liters of 30% and 16 2/3 liters of 45% HCl are needed.
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<em>Comment on the solution</em>
You may notice that the general solution to a mixture problem of this sort is that the fraction of the mix that is the highest contributor is ...
(mix % - low %) / (high % - low %) = (.35 -.30) / (.45 -.30) = .05/.15 = 1/3
4 inches by 9.375 is the answer because you divide the both numbers by 8
