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3 years ago

Need help solving hi

Mathematics

1 answer:

steposvetlana [31]3 years ago

8 0

Answer:

See below.

Step-by-step explanation:

$2 \ln(x+2)=6$

$\ln (x+2)=3$

$e^{\ln(x+2)}=e^3$

$x+2=e^3$

$x=e^3-2$

$x\approx 18. 09$

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Aleks04 [339]

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Step-by-step explanation:

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3 years ago

What's the answer? help asap plssssss Please show full explanation!

AURORKA [14]

Answer:

$\huge\boxed{Answer\hookleftarrow}$

Given,

$3x - 2y = 5$

$xy = - 2$

Now,

$(3x - 2y) {}^{2} = (5) {}^{2} \\$

Use the algebraic identity ⇻ (a - b)² = a² - 2ab + b²

$(3x - 2y) {}^{2} = (5) {}^{2} \\ 3x {}^{2} - 2 \times 3x \times 2y + 2y {}^{2} = 5 {}^{2} \\ 9 {x}^{2} - 12xy + 4y {}^{2} = 25 \\9x {}^{2} + 4y {}^{2} = 25 + 12xy \\ 9x {}^{2} + 4 {y}^{2} - 1 = 24 + 12xy$

✐ So, the value of 9x² + 4y² - 1 is 24 + 12xy

Now,

xy = - 2

So, 12xy = 12 × - 2 = - 24

•°• 24 + 12xy

= 24 + (-24)

= 24 - 24

= 0

<h3>⎆ The value of 9x² + 4y² - 1 is 0.</h3>

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# ꧁❣ RainbowSalt2²2² ࿐

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3 years ago

Read 2 more answers

Which Equation represents this problem?

Xelga [282]

The answer has to be C

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3 years ago

A train has one engine and six train cars. Find the total number of ways an engineer can arrange the train. (The engine must be

enot [183]

Answer: 720 ways

Step-by-step explanation:

Given

A train has 1 main engine and remaining 6 train cars

If the engine is always in the front the remaining train cars can be arranged is

$\Rightarrow \text{No. of ways}=6!=720\ \text{ways}$

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3 years ago

NEED ANSWERS NOW!! (Reward) brainlest and pointsss

geniusboy [140]

Answer:

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

To obtain this form use the method of completing the square.

Given

f(x) = - 0.6x² + 4.2x + 240 ← factor out - 0.6 from the first 2 terms

= - 0.6(x² - 7x) + 240

To complete the square

add/ subtract ( half the coefficient of the x- term)² to x² - 7x

f(x) = - 0.6(x² + 2(- 3.5)x + 12.25 - 12.25 ) + 240

= - 0.6 (x - 3.5)² + 7.35 + 240

= - 0.6(x - 3.5)² + 247.35

with vertex = (3.5, 247.35 )

The maximum value is the y- coordinate of the vertex

Then

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3 years ago