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3 years ago

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Which of the following are quadrilaterals?

1 answer:

Olin [163]3 years ago

6 0

Polygons are 2D shapes with straight sides. Quadrilaterals are polygons with four sides.

Trapezoids, rectangles, squares and parallelograms are all quadrilaterals as they have four sides.

Not all polygons are quadrilaterals.

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One number is 10 times as large as another, and their difference is 81. Find the numbers.

yulyashka [42]

The smaller number=x
the larger number=10x
we can suggest this equation:
10x-x=81
9x=81
x=81/9=9

The smaller number is 9
The larger number is : 10x=10(9)=90

Answer: the larger number is 90.

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4 years ago

Read 2 more answers

Let's suppose someone flips a fair coin three times. 1. How many outcomes are possible? [a] 2. What is the probability of gettin

andrey2020 [161]

Probability helps us to know the chances of an event occurring. There are 8 outcomes.

<h3>What is Probability?</h3>

Probability helps us to know the chances of an event occurring.

$\rm Probability=\dfrac{Desired\ Outcomes}{Total\ Number\ of\ outcomes\ possible}$

Let's suppose someone flips a fair coin three times.

1. The outcomes of the coins are,

HHH
HHT
HTH
HTT
TTH
THT
TTH
TTT

Therefore, there are 8 outcomes.

2. The probability of getting exactly one tail is,

P(X=1) = 2/8 = 1/4

3. The probability of getting at most two tails is,

P(X≤2) = P(X=1) + P(X+2) = 1/4 + 1/2 = 3/4

Learn more about Probability:

brainly.com/question/795909

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7 0

2 years ago

Part D Now that the power of is the same in both figures, you can just look at the first factors of each figure. So, how many ti

wariber [46]

Answer:

The first factor of the mass of an average grain of rock salt 120 is 40 times the first factor of the mass of an average grain of table salt 3.

Step-by-step explanation: Answer from edmentum Hope it helped!

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3 years ago

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What’s the exponent form of 2*2*5*5

san4es73 [151]

Answer:

The answer is 100

Step-by-step explanation:

2 times 2=4 4 times 5=20 20 times 5/5 times 2=10 then add a zero

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3 years ago

Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC =16 and DC=5 what is the length of BC in the simplest ra

Nana76 [90]

The length of BC is $4 \sqrt{5}$ .

Solution:

Given ABC is a right triangle.

AC is the hypotenuse and BD is the altitude.

AB and BC are legs of the triangle ABC.

AC = 16 and DC = 5

<u>Leg rule of geometric mean theorem:</u>

$\frac{\text { hypotenuse }}{\text { leg }}=\frac{\text { leg }}{\text { part }}$

$\Rightarrow \frac{AC}{BC}=\frac{BC}{DC}$

$\Rightarrow \frac{16}{x}=\frac{x}{5}$

Do cross multiplication.

$\Rightarrow 16\times 5 = x\times x$

$\Rightarrow 80= x^2$

$\Rightarrow 16\times 5= x^2$

Taking square root on both sides.

$\Rightarrow \sqrt{16\times 5} = \sqrt{x^2}$

$\Rightarrow \sqrt{4^2\times 5} = \sqrt{x^2}$

square and square roots get canceled, we get

$\Rightarrow 4\sqrt{ 5} = x$

The length of BC is $4 \sqrt{5}$ .

7 0

3 years ago