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bezimeni [28]
4 years ago
5

Solve for x on these problems

Mathematics
1 answer:
faust18 [17]4 years ago
4 0
13)
x+20 add x+21 = 23
41 + 2x = 23
2x =23 - 41
2x = -18
x = -9 
x equals minus nine

15)
2x + 26 = x +20
2x - x = 20 - 26
x = -6
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Football fields are 360 ft in length and 160 ft in width. Find the area
rjkz [21]

Answer:

57600cm^2

Step-by-step explanation:

To find the area, you do length * width. In this case, you do 360 * 160. The output will then be 57600cm^2

7 0
3 years ago
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Janet is 5 years older than her sister.the sum of their ages is 51.how old is her sister
Mazyrski [523]
Let us assume that the age of Janet's sister is = x
Then the age of Janet = x + 5
Now we also know that their combined age is equal to 51 years. Then we can write the equation as
x + (x + 5) = 51
2x + 5 = 51
2x = 51 -5
2x = 46
x = 46/2
   = 23
So the age of Janet = x + 5
                                = 23 + 5
                                 = 28 years
So the age of Janet's sister is 23 and Janet's age is 28
5 0
3 years ago
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Lynn measured the length of her front yard by counting her strides. The yard measured 18.5 feet long. Emily measured the same ya
Shalnov [3]

Answer:

8.11%

Step-by-step explanation:

We need to find the percentage error. We can follow the formula shown below:

PE=\frac{New-Orig}{Orig}*100

Where

PE is the Percentage Error

New is the newest measure (given as 20 feet)

Orig is the original, or first, measure (given as 18.5)

Substituting and finding the PE:

PE=\frac{New-Orig}{Orig}*100\\PE=\frac{20-18.5}{18.5}*100\\PE=\frac{1.5}{18.5}*100\\PE=8.11

Tagging the percentage , percent error is about 8.11%

7 0
3 years ago
How to pick a good number while dealing with equivalent fraction s
klemol [59]
I don't know what you mean but when you want to find equivalent fractions, I would use 10.
Ex: 6/9=60/90
7 0
3 years ago
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How to turn 2/5 into a decimal
Vladimir [108]
\frac{2}{5}=\frac{2\times2}{5\times2}=\frac{4}{10}=\boxed{0.4}
4 0
3 years ago
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