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Stolb23 [73]
3 years ago
15

Evaluate the expression for the given value of the variable. 46 + 1/5r r = -1/2

Mathematics
2 answers:
mr_godi [17]3 years ago
8 0

Hey there!

The answer to your question is  45\frac{9}{10}

We can find this by simply plugging in the "r" value into the given equation.

46 + \frac{1}{5} (\frac{-1}{2})

Now we evaluate the equation:

46 + \frac{1}{5} (\frac{-1}{2})

46 + \frac{-1}{10}

45\frac{9}{10}

Hope this helps and have an amazing day!

Luda [366]3 years ago
7 0

Answer:

45\frac{9}{10} or 45.9

Step-by-step explanation:

All we have to do here is substitute the given value of r into the given expression. Therefore, after substituting r=-\frac{1}{2} into 46+\frac{1}{5}r, we get:

46+\frac{1}{5}r

= 46+\frac{1}{5}*(-\frac{1}{2} ) (Substitute r=-\frac{1}{2} into 46+\frac{1}{5}r)

=46-\frac{1}{10} (Multiply)

=45\frac{9}{10} or 45.9 (Simplify)

Hope this helps!

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bogdanovich [222]

Answer:  x = - 2√5, √5/3

Step-by-step explantion

3 √ 5 x 2 + 25 x − 10 √ 5 = 0 35x2+25x−105=0

⇒ 3√5x2 + 30x – 5x – 10√5 = 0  

⇒ 3√5x(x + 2√5) – 5(x + 2√5) = 0  

⇒ (x + 2√5)(3√5x – 5) = 0

x = - 2√5, √5/3

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1 year ago
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2 years ago
What is the area of the shaded region between the two z-scores indicated in the standard normal curve shown below. z=-1.23 z=0.8
Reika [66]

Answer:

Correct option A: 0.6874

Step-by-step explanation:

Hello!

To calculate the area within the interval [-1.23; 0.83], you have to subtract to the probability accumulated till the lower value to the probability accumulated to the higher value, symbolically:

P(Z≤0.83)-P(Z≤-1.23)

You have to use the Z table to look for the corresponding values of probability. The negative value is in the left entry and the positive value is in the right entry. The first column shows the integer and first decimal value, the second decimal value is in the first row, you cross both values and find the value of probability.

P(Z≤0.83)-P(Z≤-1.23)= 0.7967 - 0.1093= 0.6874

I hope it helps!

6 0
3 years ago
Factorise 49x^2-121 what’s the answer
asambeis [7]

Answer:

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Step-by-step explanation:

( 7x + 11  )( 7x-  11 )

Because 7*7 is 49

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so the answer is 49x^2-121

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Explanation:

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