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zalisa [80]
3 years ago
7

Which list contains only rational numbers?

Mathematics
2 answers:
Debora [2.8K]3 years ago
7 0

Answer: Option A.

Step-by-step explanation:

Rationals numbers are defined as all those numbers which can be written as fractions, which have the form:

\frac{a}{b}

Being the numerator a and the denominator b integer numbers.

The numbers in the option A are rational numbers, because:

-4=\frac{-4}{1}\\\\0=\frac{0}{1}\\\\\frac{1}{4}\\\\\sqrt{\frac{9}{4}}=\frac{3}{2}

All these number can be written as fractions, therefore all of them are rational numbers.

Lelechka [254]3 years ago
5 0

Answer:

I think it's D

Step-by-step explanation:

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Electricity City increases the price of televisions by 25%. If a television now sells for
Burka [1]

Answer:

340

Step-by-step explanation:

As it was increased by 25%, $425 is 125% of the original price, so we can get back to 100% by dividing 425 by 5 [85], so 85 is 25% of the price. We can now get the original price by subtracting 85 from 425 (or you could multiply 85 by 4) which is 340

You can check this answer by multiplying 340 by 1.25

If the answer is 425, then it is correct, else, not. [it is]

6 0
3 years ago
In ΔCDE, the measure of ∠E=90°, the measure of ∠D=23°, and EC = 1.3 feet. Find the length of DE to the nearest tenth of a foot.
BabaBlast [244]

Answer: length of DE is about 3.3 ft

Step-by-step explanation:  A calculator is necessary!

DE is the unknown hypotenuse of the triangle

get the sine of 23° = 0.3907311285

Use the equation for sine

<em>sin = o/h</em> .

To find h,  Substitute values for sin and o.  O is EC, Opposite the 23° angle D

<em>0.3907311285 = 1.3/h</em> multiply both sides by h

h(0.3907311285) = 1.3 divide both sides by 0.3907311285

h = 1.3/0.3907311285

3.327096065 = h, the length of the hypotenuse, DE.

7 0
2 years ago
|-3 + 15| what is the sum (answer) ? I think it is 12 but my friend thinks it is 18. Who is right?
Aliun [14]
I do believe it is 12 as well considering the fact that it's negative three and not positive. If it was a positive three then maybe it would be 18.
4 0
3 years ago
Read 2 more answers
What is this number in standard form?
balandron [24]

Answer: y=5(x+15)2−26 5

8 0
2 years ago
A coordinate grid is shown below: A coordinate grid from negative 2 to 0 to positive 2 is drawn. There are three grid lines betw
Anastasy [175]

Answer:

Part A: 0

Part B: (-1,-1) since point (-1,1) is located in quadrent four when it is reflected over the y axis the second point would be located in quadrent three and the x and y would both be negative.

Step-by-step explanation:

3 0
3 years ago
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