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3 years ago

Evaluate the expression : common log of square root 9/25.

Mathematics

1 answer:

tekilochka [14]3 years ago

4 0

You want log √(9/25). Recognizing that √9 = 3 and that √25 = 5, we get

log 3/5, which by rules of logs comes out to log 3 - log 5.

To four decimal places:

log 3 - log 5 = 0.4771 - 0.6990, or -0.2218.

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Of a triangle

arsen [322]

Complete question is attached.

Answer:

a) ED = 6.5 cm

b) BE = 14.4 cm

Step-by-step explanation:

From the triangle, we are given the following dimensions:

AB = 20 cm

BC = 5 cm

CD = 18 cm

AE = 26 cm

We are asked to find length of sides ED and BE.

a) Find length of ED.

From the triangle Let's use the equation:

$\frac{AB}{BC} = \frac{AE}{ED}$

Cross multiplying, we have:

AB * ED = AE * BC

From this equation, let's make ED subject of the formula.

$ED = \frac{AE * BC}{AB}$

Let's substitute figures,

$ED = \frac{26 * 5}{20}$

$ED = \frac{130}{20} = 6.5$

Therefore, length of ED is 6.5 cm.

b) To find length of BE, let's use the equation:

$\frac{AB}{AC} = \frac{BE}{CD}$

Cross multiplying, we have:

AB * CD = AC * BE

Let's make BE subject of the formula,

$BE = \frac{AB * CD}{AC}$

From the triangle, length AC = AB + BC.

AC = 20 + 5 = 25

Substituting figures, we have:

$BE = \frac{20 * 18}{25}$

$BE = \frac{360}{25} = 14.4$

Therefore, length Of BE is 14.4cm

7 0

3 years ago

I am not sure if my son got the first answers right and he is stuck on the last three. The teacher did not provide good instruct

Paul [167]

Answer:

1. Is correct

2. Isn't correct, (It would be number 1)

3. I'm unsure, (But I believe its number 1)

Step-by-step explanation:

2. These are angles across from each other.

3. These are Angles of the same side that don't over lap.

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3 years ago

What is one times eight

Anvisha [2.4K]

1*8=8
8 is your answer

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3 years ago

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8^0 is greater than 8^1 true or false

liq [111]

Answer:

False 8^0 is not greater than 8^1

Step-by-step explanation:

8^0 = 1

8^1= 8

8>1

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2 years ago

Cayden bought a total of 7 paperback books , 2 of which are biographies. What was the total cost of the 7 paperbacks if they nor

NikAS [45]

Answer:

112

7*16=112

That is the answer, hope this helps

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3 years ago

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