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alukav5142 [94]
3 years ago
15

Calculate: √5/2-√5+2/2+√5

Mathematics
2 answers:
klio [65]3 years ago
4 0
-√5/2+√5+1
-√5/2+2√5/2+1
√5/2+1
(√5+2)/2

Inessa05 [86]3 years ago
3 0
So,

\frac{ \sqrt{5} }{2} - \sqrt{5} + \frac{2}{2} +\sqrt{5}

\frac{1}{2}\sqrt{5} - \sqrt{5} + \frac{2}{2} +\sqrt{5}

First, we have to simplify the expression.

We can see that there is a negative square root of 5 and a positive square root of 5.  They cancel out.  In addition, we know that two-halves are equal to 1.

\frac{1}{2}\sqrt{5} + \frac{2}{2}

\frac{1}{2}\sqrt{5} + 1

Since the square root of 5 can be thought of as 5 to the one-half power, we should evaluate that first.

\sqrt{5}=2.23606797749978969640\ or\ approximately\ 2.236

Substitute 2.236 for the square root of 5.

\frac{1}{2}(2.236) + 1

Multiply.
1.118 + 1

Add.
2.118

So the expression is approximately equal to 2.118 (exactly 2.1180339887498948482045868343656).
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x=13                 division property of equality

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You're standing 80 feet from the base of a building . You estimate that angle of elevation from your feet to the top is about 70
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In planning her retirement, Liza deposits some money at 2.5% interest, with twice as much deposited at 4.5%. Find the amount dep
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Let us assume $x is deposit at 2.5% interest.

At the rate 4.5% deposited amount is twice of the amount deposited at 2.5%.

Therefore, at the rate 4.5% deposited amount = $2x.

Total interest earned by both different deposited amount at the rate 2.5% and at the rate 4.5% = $1150.

We can setup an eqation now,

Interest earned on $x at 2.5% + interest earned on $2 at 4.5% = $1150.

2.5% of x + 4.5% of 2x = 1150

Percentage could be written in decimals by dividing by 100.

Therefore, 2.5% = 2.5 /100= 0.025 and 4.5% = 4.5/100 = 0.045.

We could rewrite above equation as,

0.025*x + 0.045 * 2x = 1150

0.025x + 0.09x =1150

Adding 0.025x + 0.09x, we get 0.115x.

So, 0.115x=1150.

Dividing both sides by 0.115.

0.115x/0.115=1150/0.115.

x= $1000.

2x= 2* 1000= $2000

Therefore,

$1000 deposited at 2.5% and $2000 deposited at 4.5%.



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Answer:

  isosceles

Step-by-step explanation:

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A triangle with two congruent internal angles is an isosceles triangle.

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A rectangle is 3 feet longer than it is wide . if the perimeter is 30 feet , find the area in square feet .
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Answer:

Hey

Step-by-step explanation:

I beleve you answer is 10 because 3 time 10 equals 30 and the question sais "3 times longer"

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