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3 years ago

7

What is 5 4/9 + 2 15/36 as a whole or mixed number??

1 answer:

pshichka [43]3 years ago

8 0

You have to add the whole numbers, which is 5 + 2 = 7. Then you add the fractions. In order to do that, you have to convert 4/9 to X/36 so 15/36 and 4/9 have the same denominator. In this case, 9 is a factor of 36, so you can multiply 4/9 by 4/4 (which is like multiplying by one). The result is 16/36. Now add the numerators 15 + 16 = 31. Denominator remains 36 because you do not change it when you add fractions.

The result therefore is 7 and 31/36.

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Is the product of fifteen negative integers positive or negative?

enot [183]

Answer:

the sign of the product of 15 negative numbers will be negative

Step-by-step explanation:

Heya mate!!

The product of odd numbers is odd and the product of even numbers is even.

so 15 is an odd number then the sign of product is odd

Hope this helps!!!

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3 years ago

puteri [66]

Yes they are all right

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3 years ago

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Dmitriy789 [7]

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2 years ago

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If fx = 2x^2 + 3 and g(x) = x^2 - 7 find (f - g) (x)

Semmy [17]

(f-g) (x) means to subtract g(x) from f(x)

F(x) = 2x^2 +3

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This becomes:

2x^2 + 3 - x^2 = x^2 +3

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3 years ago

In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD=√2 cm.

Zielflug [23.3K]

Given that triangle ABC is right angle triangle. CD is altitude such that AD=BC

ABC is a right angle triangle so apply Pythogorean theorem

$AC^{2} + BC^{2} = AB^{2}$

$AC^{2} + AD^{2} = AB^{2}$ (Given that AD = BC)

$AC^{2} + AD^{2} = 3^{2}$ (Given that AB=3)

$AC^{2} + AD^{2} = 9$ ...(i)

ADC is a right angle triangle so apply Pythogorean theorem

$AD^{2} + CD^{2} = AC^{2}$

$AD^{2}+(\sqrt{2})^2= AC^{2}$

$AD^{2}+2= AC^{2}$

$AD^{2}=AC^{2} -2$ ...(ii)

Plug value (ii) into (i)

$AC^{2} + AC^{2}-2 = 9$

$2AC^{2} -2=9$

$2AC^{2} =11$

$AC^{2} =\frac{11}{2}$

$AC=\sqrt{\frac{11}{2} }$

Hence final answer is $AC=\sqrt{\frac{11}{2} }$

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3 years ago

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