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DedPeter [7]
2 years ago
5

The perimeter of a rectangular field is 314 m.

Mathematics
1 answer:
Ksivusya [100]2 years ago
3 0

Answer:

85m

Step-by-step explanation:

Perimeter of a rectangle = 2(l+b)

b=72m, l=?

perimeter =314m

314=2(l+72)

314/2= l+72

157=l+72

l=157-72

l=85m

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The cost of renting a bus for a field trip was split evenly among 20 students. At the last minute, 10 more students joined the t
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By solving a linear equation, we will see that the total cost for renting the bus is $90.

<h3>What was the total cost of renting the bus, in dollars?</h3>

Let's say that the total cost is C.

When there are 20 students, each student should pay:

p = C/20

When the other 10 students are added (for a total of 30) each student pays:

p' = C/30.

We know that the cost for each of the original 20 students decreased by $1.50, so:

p' = p - $1.50

Then we have 3 equations to work with:

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Now we can replace the first and second equations into the third one:

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Now we can solve this linear equation for C:

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If you want to learn more about linear equations:

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4 0
1 year ago
An article regarding interracial dating and marriage recently appeared in the Washington Post. Of the 1,709 randomly selected ad
VMariaS [17]

Answer:

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

Step-by-step explanation:

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In which

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95% confidence level

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The lower limit of this interval is:

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The upper limit of this interval is:

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The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

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3 years ago
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Answer:

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Step-by-step explanation:

That is that as an equation.

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2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

all i did was look 1 - f = 5 then f equaled 6!

8 0
3 years ago
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