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Rudiy27
4 years ago
5

Is 2.78778777... a irational number

Mathematics
2 answers:
Cerrena [4.2K]4 years ago
7 0
If by the ellipses you mean to say that the number 7 repeats forever after that point, then it is not irrational. Any number which can be expressed with repeating decimals is not irrational. For example, pi is an irrational number because it has no repeating decimals, but 0.33333333... is not irrational because it can be expressed by simply saying 0.3 repeated.
adell [148]4 years ago
4 0
YES!!! 2.78778777 is an irrational number because it has endless numbers, and a irrational number cant be put as a fraction but rational numbers can be put as a fractio!!
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Please help me thanks!
IrinaK [193]

Answer:

See below ~

Step-by-step explanation:

Formula for area of a triangle :

<u><em>Area (triangle) = 1/2 × base × height</em></u>

<u><em /></u>

=============================================================

Solving :

<u>Triangle 1 (Top Left)</u>

⇒ Area = 1/2 × 11 × 3

⇒ Area = 33/2

⇒ Area = 16.5 in²

<u>Triangle 2 (Top Right)</u>

⇒ Area = 1/2 × 8 × 7.2

⇒ Area = 4 × 7.2

⇒ Area = 28.8 cm²

<u>Triangle 3 (Bottom Left)</u>

⇒ Area = 1/2 × (5.5 + 5) × 10.4

⇒ Area = 10.5 × 10.4

⇒ Area = 109.2 m²

<u>Triangle 4 (Bottom Right)</u>

⇒ Area = 1/2 × (2 + 7) × 5.5

⇒ Area =  9 × 2.75

⇒ Area = 24.75 in²

4 0
2 years ago
She estimates 3/4 cups of snack mix , how many snack mix she needs in order to make 200 servings
Elenna [48]
<span>She estimates 3/4 cups of snack mix for each serving.
how many snack mix she needs in order to make 200 servings ?
We have 3/4 x 200= 3*50= 150 cups of snacks
Have fun
</span>
5 0
4 years ago
Troy signed up for a new cell phone plan which charges him a fee of $40 per month, plus $0.05 for each text message that he send
nataly862011 [7]
He can send 600 messages.
40+0.05x=70
-40+0.05x=70-40
0.05x=30
So divide 30 by 0.05
and you get 600.
5 0
3 years ago
4.05 LC)
Goshia [24]

Answer:

r

Step-by-step explanation:

we know this because it is the only part of the graph that is moving downwards, meaning its decreasing. P is an example of increasing, Q is 'neutral' and s is also increasing.

5 0
3 years ago
6 minus the difference of x and 3, in a algebraic expression.
user100 [1]

Answer:

9-x

Step-by-step explanation:

The difference between x and 3 is x-3.

Now 6 minus x-3:

6-(x-3)=

= 6-x+3

= 9-x

4 0
4 years ago
Read 2 more answers
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