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iren2701 [21]
3 years ago
11

pls help‎‎ ‎ ‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎

‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎​

Mathematics
1 answer:
givi [52]3 years ago
8 0

Answer:

c) 1

Step-by-step explanation:

\frac{1}{2}(12·g)-h

g= \frac{1}{4} and h=\frac{1}{2}; substitute back in the equation

\frac{1}{2}(12·\frac{1}{4}) - \frac{1}{2}; multiply inside the parenthesis

\frac{1}{2}(3)- \frac{1}{2}; multiply and notice the same denominator

\frac{3}{2}-\frac{1}{2} = \frac{2}{2} = 1; subtract the fractions

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Which expression has an irrational answer?
Sati [7]

Solution:

A number is said to be irrational , if the decimal expansion of a number is non terminating non repeating.

For example , 2.01001000100001......., √3,∛5,....

Now coming to Options

(A) 4 + 2.5

4 as well as 2.5 is rational . So sum of two rational is a rational.

(B) 3 × \frac{1}{3}

Since 3 is rational , but   \frac{1}{3} is irrational. So product of rational and irrational should be irrational.

Because  \frac{1}{3}= 0.333333.......(non terminating non repeating)

But numerator which is 3 and denominator which is 3 cancels out and result is 1 which is rational number.

(C) 2 × (real number=a )raised to power of 7

=2 (a)^7

= a^7 has denominator of the form other than 2^a or 5 ^b or (2 ^a \times 5 ^b) , then it is irrational number.

So, 2 (a)^7 is rational or irrational depends on the value of a.  

(D) 1.25 + 4.25

Both 1.25 as well as 4.25 are rational. So their sum is rational.

So, option (C) 2 (a)^7 may be irrational , it totally depends on the value of a.


5 0
4 years ago
Read 2 more answers
Evaluate (–1)8 + (–1)7 + –16 + –14 – (–1)2. A. 5 B. –3 C. –4 D. –23
Olin [163]

Answer:

= -43

Step-by-step explanation:

Evaluating the expression;

(–1)8 + (–1)7 + –16 + –14 – (–1)2

We can use Bodmas

We remove the brackets first

(–1)8 + (–1)7 + –16 + –14 – (–1)2

We get

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but; - × + = - and - × - = +

Thus;

-8 - 7 - 16 - 14 + 2

= -8 -7 - 16 - 12

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3 0
3 years ago
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Answer:

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Step-by-step explanation:

26+22=48

48 x 32 = 1,536

Estimate-1,500 or 1,540

Exact-1,536

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4 years ago
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