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3 years ago

If ABCD is a square with one side equal to 10 cm what is the length of BD?

Mathematics

2 answers:

Andre45 [30]3 years ago

8 0

Answer/Step-by-step explanation:

Square = 4 equal sides

1 side = 10 cm

So,

A+B+D+C = 10+10+10+10

so it equals 40

But we arfe looking for half of it or adding of the sides,

B+D

10 + 10 = 20

<h2><u>Answer = 20 cm </u></h2>

You could have also done it by :

The whole thing is 40, and a square has 4 sides. We are looking at 2 sides which is half so ,

40/2 = 20 cm

<h2><u>Answer: 20 cm</u></h2>

goldfiish [28.3K]3 years ago

5 0

Answer:

Step-by-step explanation:

10+10+10+10=40

40/2=20

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Answer:

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Step-by-step explanation:

The answer for this is 3 /3/20

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3 years ago

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Zigmanuir [339]

Answer:

$\frac{1}{2}$ (a + 2b)(a - b)

Step-by-step explanation:

Assuming you require the expression to be factored

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Consider the factors of the coefficient of the b² term(- 2) which sum to give the coefficient of the ab- term (+ 1)

The factors are + 2 and - 1, since

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3 years ago

Determine the point estimate of the population proportion, the margin of error

ahrayia [7]

Answer:

$\hat p=0.645\\\\ME=0.233\\\\x=645 \ individuals$

Step-by-step explanation:

-Given the boundaries as 0.412 and 0.878

- $\hat p$ is the point estimate for the population proportion and is calculated as follows:

$\hat p=\frac{Upper \ Bound+Lower \ Bound}{2}\\\\=\frac{0.878+0.412}{2}\\\\=0.645\\\\$

#The margin of error, ME can be calculated for the confidence intervals using the formula:

$ME=\frac{Upper \ Bound-Lower \ Bound}{2}\\\\=\frac{0.878-0.412}{2}\\\\=0.233$

#The number of individuals in the sample is the product of the point estimate and population size:

$\hat p=\frac{x}{n}\\\\x=\hat pn\\\\=0.645\times 1000\\\\=645$

Hence, there are 645 individuals in the sample.

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3 years ago

last month maria hiked a 5 mile trail several times and a 10 mile trail several times let x represent the number of times she hi

Vlada [557]

Answer:

5x + 10y = 90

Step-by-step explanation:

X is the number of times she takes the 5 mile, so the total distance would be 5x. Y is the number of times she takes the 10 mile, so the total distance would be 10y. And together they equal 90 miles, so 5x + 10y =90. Hope this helps.

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3 years ago

carley beat the school record for the 400 meter run by 1.3 seconds. if she ran the race in 55.7 seconds what was the record?

Vika [28.1K]

Answer:

If Carley ran the 400 meter run in a total of 55.7 seconds and she beat the record by 1.3 seconds, you would add 55.7 and 1.3

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3 years ago