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melomori [17]
2 years ago
5

Solve similar triangles (advanced)

Mathematics
1 answer:
Reil [10]2 years ago
7 0

Answer:

x = 5

Step-by-step explanation:

Thales' theorem

\frac{9}{3} =\frac{15}{x}

x=\frac{(15)(3)}{9} =\frac{45}{9} =5

hope this helps

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A solution with a pH of 11 has a [H+] of:<br> 11<br> 1 x 10-3<br> 1 x 10-11<br> 1 x 1011<br> 1 x 103
serious [3.7K]

A solution with a pH of 11 has a [H+] of 1.0\times 10^{-11}

Option B is correct option.

Step-by-step explanation:

A solution with a pH of 11 has a [H+] of= ?

pH=?

Concentration of H+ [H+]= ?

Formula used: pH=-log[H+]

Putting values and finding [H+]

pH=-log[H+]\\\,[H+]\,=10^{-pH}\\\,[H+]\,=10^{-11}\\\,[H+]\,=1.0\times 10^{-11}

So, A solution with a pH of 11 has a [H+] of 1.0\times 10^{-11}

Option B is correct option.

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4 years ago
Joyce can type 60 words in five minutes. Robert can type 48 words in six minutes words who type at the faster and how many words
erik [133]

Answer:

joyce

Step-by-step explanation:

60/5 =12

48/6 =8

6 0
3 years ago
(3x + 20) (5x) find x
HACTEHA [7]

15x^2+100x


hope this helps

7 0
3 years ago
How many Years are there in 4 centuries?
AfilCa [17]
A century is 100 years. 4 times 100 equals 400. The answer is 400
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Michael invested 5,000 in an account that has a 5.5% annual interest rate. What equation best describes investment after T years
ivolga24 [154]

Answer:

V = 5000 +  275*T   for simple annual interest

or:   A = 5000 * (1.055)^T   for an annual compound interest

Step-by-step explanation:

I assume this is a simple interest rate.  If not I will give the one for compound interest.

V = 5000 + 5000* 0.055 * T      (Value of account after T years)

V = 5000 +  275*T   for simple annual interest

or:   A = 5000 * (1.055)^T   for an annual compound interest

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3 years ago
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