First we put the sentence into a function
9/10 * x + 6= 51Well then we solve<span>.</span><span>9/10* x= 51-6
9/10*x= 45
(<span>for</span> me is easier to make the fraction into a decimal...)
0.9*x= 45
x=45/0.9
x= 50
We check
9/10 * 50 + 6= 51
45+6=51
51=51
So the answer is x= 50</span>
So first, we want to find the total decrease on the number.
Since it was first decreased by 50% and then 10%, we can just multiply the two together to find what 10% of 50% is. I find it easier when they're both fractions, or 1/2 and 1/10.
1/2 * 1/10 = 1/20
So one quarter is 1/4, or 5/20.
1/20 is 4/20 less then 5/20.
1/20 is 30 less then 1/4, then 4/20 must equal 30.
4/20 is also 1/5.
So just multiply 30 by 5, to get 150 as your number. (1/5 * 5 = 5/5)
Use first differences. You are subtracting. Difference = Subtracting.
9 - x = 4
4 - x = -1
-1 - x = -6
Find for x.
9 - x = 4
- x = 5
x = -5
Therefore the answer is B.
Proof:
9 - 5 = 4
4 - 5 = -1
-1 - 5 = -6
Answer:
20 cm
Step-by-step explanation:
If the scale says that the building uses the scale or 1 cm: 6 meters. You pretty much just take 120 and divide by 6. You take that answer and turn the units in cm.
1. There are 37 boys that prefer Legos. Look in the "boys" row and "Legos" column to find the value 37.
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2. There are 26 girls that prefer Legos. This is the same story as problem 1, except we're looking in the "girls" row now. The column is kept the same.
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3. The answer here is 22. Look at the "painting" column and the "total" row to find the total number of people who prefer painting.
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4. The total number of girls that responded to the survey is 40. Look in the "girls" row and the "total" column.
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5. There are 85 total people who responded to the survey. Look at the bottom right hand corner where we are in the "total" row and "total" column. We refer to this as the grand total (in contrast to a subtotal such as 45 boys or a subtotal of 40 girls).
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In summary,
1. answer: 37
2. answer: 26
3. answer: 22
4. answer: 40
5. answer: 85