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myrzilka [38]
3 years ago
5

What is the value of x? a. 25 b. 12 c. 7 d. 5

Mathematics
1 answer:
s2008m [1.1K]3 years ago
6 0
A^2+b^2=c^2
4 squared and 3 squared =25
square root of 25 is 5
answer is d
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g100num [7]
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5 0
3 years ago
What is the true solution to the equation below?
jarptica [38.1K]

Answer:

Step-by-step explanation:

some rules of logarithmic function

ln(a) - ln(b)=ln(\frac{a}{b})

e^{ln(a)}=a

ln(a)^{n}=nln(a) vice-versa nln(a)=ln(a)^{n}

If ㏑(a) = ㏑(b), then a = b

∴ 2ln(e^{ln(2x)})-ln(e^{ln(10x)})=ln(30)

Use the 2nd rule to simplify it

e^{ln(2x)}=2x\\e^{ln(10x)}=10x\\

2㏑(2x) - ㏑(10x) = ㏑(30)

Use the 3rd rule in the 1st term

∵ 2㏑(2x) = ㏑(2x)² = ㏑(4x²)

∴ ㏑(4x²) - ㏑(10x) = ㏑(30)

- Use the 1st rule with the left hand side

ln(4x^{2})-ln(10x)=ln(\frac{4x^{2}}{10x})\\\\ln(\frac{4x^{2}}{10x})=ln(30)\\\\ \frac{4x^{2}}{10x}=\frac{2x}{5}=\frac{2}{5}x\\\\ ln(\frac{2}{5}x)=ln(30)

Use the 4th rule

\frac{2}{5} x = 30

Multiply both sides by 5

∴ 2 x = 150

- Divide both sides by 2

∴ x = 75

The value of x = 75

3 0
3 years ago
Evaluate 15+w for w=6
svetlana [45]

Answer:

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Step-by-step explanation:

To evaluate, substitute w = 6 into the expression, that is

15 + w = 15 + 6 = 21

3 0
3 years ago
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yaroslaw [1]
-7-x= 3 \\  \\ -x= 3+7\quad \to -x= 10\to  \boxed{x=10}  \\  \\  \\ -7-x= 8 \\  \\ -x= 8+7\quad -x= 15\to  \boxed{x= -15}
4 0
3 years ago
Can someone help me on this please thank u
kakasveta [241]

Answer:90

Step-by-step explanation:

My reasoning is because it makes a right angle and a right angle is equivalent to 90 degrees

6 0
2 years ago
Read 2 more answers
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