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2 years ago

If x is equal to –2, then find the value of 3x² + 5x

Mathematics

1 answer:

attashe74 [19]2 years ago

5 0

Answer:

Step-by-step explanation:

3*(-2)to power of 2 + 5*-2

= 3*4 + 5*-2

= 12 + -10 = 2

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Question help please these are them 3

iren [92.7K]

Answer: 0

Step-by-step explanation:

$log_{m} 1 = x$

1 = mˣ

1 = m⁰

**************************************************************

Answer: $x = -\frac{2}{33}$

Step-by-step explanation:

log₁₀ (1 - 6x) = 2 restriction: 1 - 6x > 0 ⇒ x < $\frac{1}{6}$

1 - 6x = 10²

1 - 6x = 100

-1 -1

-6x = 99

$\frac{-6x}{-6} = \frac{99}{-6}$

x = $-\frac{2}{33}$

**************************************************************

Answer: $x = -\frac{3}{5}$

Step-by-step explanation:

$\frac{1}{\sqrt[5]{27} }$ = 3ˣ

$\frac{1}{\sqrt[5]{3^{3}} }$ = 3ˣ

$\frac{1}{3^{\frac{3}{5} } }$ = 3ˣ

$3^{-\frac{3}{5}$ = 3ˣ

$-\frac{3}{5} = x$

**************************************************************

Answer: $x = \frac{5}{9}$

Step-by-step explanation:

ln 2 + ln x = ln 5 + ln (4x - 2)

ln (2(x)) = ln (5(4x - 2))

2x = 5(4x - 2)

2x = 20x - 10

-20x -20x

-18x = -10

$\frac{-18x}{-18} = \frac{-10}{-18}$

$x = \frac{5}{9}$

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3 years ago

Ken is thinking of a number. Nine more than the product of 4 & the number is 73. Find Ken's number.

motikmotik

Answer:

x = 16

Step-by-step explanation:

Let the unknown number be x.

Translating the word problem into an algebraic expression, we have;

4x + 9 = 73

4x = 73 - 9

4x = 64

x = 64/4

x = 16

Therefore, the unknown number is 16.

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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If x is equal to –2, then find the value of 3x² + 5x​

If x is equal to –2, then find the value of 3x² + 5x