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Gnesinka [82]
2 years ago
5

Are these ratios 2/4 and 20/36 proportional and how do i show the work

Mathematics
2 answers:
Papessa [141]2 years ago
8 0

Proportional ratios are the same.  2:4=1:2 and 20:36=5:9 are not the same.

In general

a:b = c:d

when ad = bc

Here 2(36)=72 is not equal to 4(20)=80, so the ratios are not the same.

Agata [3.3K]2 years ago
7 0

Answer:

Proportional ratios are the same.  2:4=1:2 and 20:36=5:9 are not the same.

In general

a:b = c:d  

when ad = bc

Here 2(36)=72 is not equal to 4(20)=80, so the ratios are not the same.

Step-by-step explanation:

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PolarNik [594]

Answer:

Step-by-step explanation:

hello :

f(x) = 2x +1 and g(x) = x².

(gºf)(a)= g(f(a)) = g(2a+1) = (2a+1)² = 4a²+4a+1

3 0
3 years ago
Construct a quadratic polynomial whose zeroes are negatives of the zeroes of the
sp2606 [1]

Given:

The given quadratic polynomial is :

x^2-x-12

To find:

The quadratic polynomial whose zeroes are negatives of the zeroes of the given polynomial.

Solution:

We have,

x^2-x-12

Equate the polynomial with 0 to find the zeroes.

x^2-x-12=0

Splitting the middle term, we get

x^2-4x+3x-12=0

x(x-4)+3(x-4)=0

(x+3)(x-4)=0

x=-3,4

The zeroes of the given polynomial are -3 and 4.

The zeroes of a quadratic polynomial are negatives of the zeroes of the given polynomial. So, the zeroes of the required polynomial are 3 and -4.

A quadratic polynomial is defined as:

x^2-(\text{Sum of zeroes})x+\text{Product of zeroes}

x^2-(3+(-4))x+(3)(-4)

x^2-(-1)x+(-12)

x^2+x-12

Therefore, the required polynomial is x^2+x-12.

4 0
3 years ago
Put these numbers in order from least to greatest.<br><br> 7, -1/4,-15/20
Agata [3.3K]

Answer:

The answer is -15/20, -1/4, 7. Thanks

8 0
2 years ago
What is the square root of 21
Andru [333]

Answer:

4.58

Step-by-step explanation:

21 is not a perfect square, but lies between the perfect squares 16 and 25.  Thus, √21 lies between √16 and √25, that is, between 4 and 5.  Since 21 is closer to 25 than to 16, √21 is closer to 5 than to 4.  A rough estimate of √21 would be 4.7.

√21 done on a calculator comes out to 4.58.

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2 years ago
Muplication of fractions explain
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3 years ago
Read 2 more answers
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