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rodikova [14]
3 years ago
11

Which expression is equivalent?

Mathematics
1 answer:
Dafna11 [192]3 years ago
5 0

Distribute the -9 into the values in the parentheses.

-9(-2x-3)

-9*-2x=18x

-9*-3=27

Therefore, the equation then becomes: 18x+27.

<u>The answer is the first choice, or A.</u>

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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
3. To which set of numbers does the product of the following numbers belong?
PIT_PIT [208]
Natural number because they are while
7 0
3 years ago
PLEASE HELP ILL GIVE BRAINLIEST!!List the sides of ∆DEF in order from shortest to longest if m∠D = 20, m∠E = 120, and m∠F = 40.
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Answer:

In triangle DEF:

Given:  m\angle D = 20^{\circ} ,  m\angle E= 120^{\circ} and  m\angle F = 40^{\circ}

To list the sides of a triangle in order from shortest to longest.

In the Figure as shown below :

If one of the angle of a triangle is larger than, then the sides opposite the larger angle is longer than the side opposite to the shorter

m\angle D < m\angle F < \angle E

\text{EF} < \text{DE}

Therefore, the list of the sides of a triangle DEF in order from shortest to longest is, \text{EF} < \text{DE}

7 0
2 years ago
Read 2 more answers
A central angle θ in a circle with a radius of 6.4 centimeters intercepts an arc with a length of 8 centimeters. What is the rad
vlada-n [284]
Radius of the circle = r = 6.4 cm
Length of the arc = s = 8 cm
Measure of angle formed by the arc = <span>θ = ?

The radius of the circle, arc length and the angle made by the arc at the center of the circle are related by the equation:

s = r</span><span>θ

From here we can find </span><span>θ by:

</span><span>θ = s/r

Using the values, we get:

</span><span>θ = 8/6.4
</span><span>
θ</span><span>= 1.25 radians

Thus the radian measure of the angle </span>θ made by the arc will be 1.25 radians
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3 years ago
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ser-zykov [4K]

Answer:

Step-by-step explanation:

These problems where you are not told what basic shape you are working with and have to assume some properties, just should not be asked. You are to assume that this is a parallelepiped.

The answer that you want is B

The length of the rectangle is 8 in given along the bottom. The top is also 8 in. The width of that rectangle is 4. The rectangle is the top of the drawing.

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3 years ago
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