When you subtract a negative it is same as just adding the number so 3x--19=3x+19 You now have 3x+19=11 Subtract both sides by 19 and you get 3x=-8 Divide by 3 and you get x=-8/3 which is -2 and 5/3 or -2.667
What is the difference between Partial Product and Regrouping? Describe.
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Partial Product is for multiplication and regrouping is for addition.
Hope that helped:)
870 is 30% of what number
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I got 2,900. What I did was divide 870 by 3 to get 10%. Then i multiplied it by 10 to get 100%, which is 2,900
your answer is 29 divide 870 divided by 30
-2/5n = -30 n=
can some one help pleaasee
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-2/5n=-30n multiply both sides by -1 sinc I don' like negatives 2/5n=30n multipl yboth sides by 5/2 1n=150/2n n=75n this is obviously false, the only number that would work is 0 since 0 =0 times 75
n=0
the alabama river is 729 miles. if 1 mile equals 1.61 kilometers, find the length of the river to the nearest whole kilometer. (due tomorrow)
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1 times 729=729 so
1mile=1.61kiloneter multiply both sides by 729 to get 729 miles on left side 729 miles=1173.69 kilometer
whole 1173.6 6>5 so round up 1174
answer is 1174 kilometer
John is trying to determine the length of the staircase he will need for a deck that is 12 feet high he wants to start the stairs 21 feet from the deck
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right triangle legs are 21 and 12
a^2+b^2=c^2 12^2+21^2=c^2 144+441=c^2 585=c^2 sqrt both sides 5√65=c aprox 24.1868=c