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2 years ago

Solve for x: x + 8 = 15

Mathematics

1 answer:

love history [14]2 years ago

6 0

Answer:

Step-by-step explanation:

x + 8 = 15

Subtracting 8 from both sides,

x = 15 - 8

=> x = 7

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Differentiate x raise to Power 3

olga2289 [7]

Answer:

3x^2

Step-by-step explanation:

d/dx (x^3)

d/dx (x^n) = n*x^(n-1)

3x^2

7 0

2 years ago

If a is a negative number, then a(1/a) is equal to -1. If a is a negative number and b is a negative number, then product ab is

Firdavs [7]

Both claims are false. In fact, $a$ and $\frac{1}{a}$ are one the multiplicative inverse of the other. This means, by definition of multiplicative inverse, that

$a \cdot \dfrac{1}{a} = 1 \quad\forall a \in \mathbb{R}$

So, it doesn't matter if $a$ is positive or negative: the multiplication of one number and its inverse will always be 1: for example,

$(-2) \cdot \dfrac{1}{-2} = \dfrac{-2}{-2} = 1$

Similarly, when you multiply two number, the sign of the product depends on the sign of the factors as follows:

$(+) \cdot (+) = (+)$
$(+) \cdot (-) = (-)$
$(-) \cdot (+) = (-)$
$(-) \cdot (-) = (+)$

So, the multiplication of two negative numbers is a positive number.

8 0

2 years ago

What is the answer to the question?

ololo11 [35]

Answer:

I think the answer is -25

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Solve the inequality:-3x-4/7 >5

Aliun [14]

x < - $\frac{13}{7}$

add $\frac{4}{7}$ to both sides

- 3x > $\frac{4}{7}$ + $\frac{35}{7}$

- 3x > $\frac{39}{7}$ ( divide both sides by - 3 )

note that when we divide/ multiply by a negative quantity we must reverse the inequality symbol

x < - $\frac{13}{7}$

6 0

3 years ago

Which of the following is irrational?

dedylja [7]

Answer:

$\sqrt{2}$

Step-by-step explanation:

the other 3 are perfect squares and have rational answers.

$\sqrt{1.44} =1.2\\\sqrt{1}= 1\\\sqrt{4} =2$

6 0

1 year ago

Read 2 more answers