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3 years ago

Which of the following expressions are equivalent to this expression: –1(0) = ?

Mathematics

2 answers:

g100num [7]3 years ago

7 0

Answer:

The answer is 0 of this expression.

Step-by-step explanation:

Given:

-1(0) = ? In the question there are no options so just solving the expression.

Now, the original expression is equal to 0 because anything multiplied by 0 is equal to 0. Solving inside the brackets and then multiplying for the possible answers.

So,

$-1(0) = -1\times 0 = 0$ .

Therefore, the answer is 0 of this expression.

Scorpion4ik [409]3 years ago

4 0

Answer:

–1[4 + (–4)]

Step-by-step explanation:

took the quiz

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A particle is projected with a velocity of <img src="https://tex.z-dn.net/?f=40ms%5E-%5E1" id="TexFormula1" title="40ms^-^1" alt

Katena32 [7]

Answer:

$2\sqrt{55}\text{ m/s or }\approx 14.8\text{m/s}$

Step-by-step explanation:

The vertical component of the initial launch can be found using basic trigonometry. In any right triangle, the sine of an angle is equal to its opposite side divided by the hypotenuse. Let the vertical component at launch be $y$ . The magnitude of $40\text{ m/s}$ will be the hypotenuse, and the relevant angle is the angle to the horizontal at launch. Since we're given that the angle of elevation is $60^{\circ}$ , we have:

$\sin 60^{\circ}=\frac{y}{40},\\y=40\sin 60^{\circ},\\y=20\sqrt{3}$ (Recall that $\sin 60^{\circ}=\frac{\sqrt{3}}{2}$ )

Now that we've found the vertical component of the velocity and launch, we can use kinematics equation $v_f^2=v_i^2+2a\Delta y$ to solve this problem, where $v_f/v_i$ is final and initial velocity, respectively, $a$ is acceleration, and $\Delta y$ is distance travelled. The only acceleration is acceleration due to gravity, which is approximately $9.8\:\mathrm{m/s^2}$ . However, since the projectile is moving up and gravity is pulling down, acceleration should be negative, represent the direction of the acceleration.

What we know:

$v_i=20\sqrt{3}\text{ m/s}$
$a=-9.8\:\mathrm{m/s^2}$
$\Delta y =50\text{ m}$

Solving for $v_f$ :

$v_f^2=(20\sqrt{3})^2+2(-9.8)(50),\\v_f^2=1200-980,\\v_f^2=220,\\v_f=\sqrt{220}=\boxed{2\sqrt{55}\text{ m/s}}$

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3 years ago

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3 years ago

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yaroslaw [1]

Step-by-step explanation:

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2 years ago

The length of a rectangle is 11 less than 9 times the width. The

Olin [163]

Answer:

Length = 7 Width = 2

Step-by-step explanation:

L = Length

W = Width

L=9w-11

2L+2W=18

2(9W-11) + 2W = 18

18W - 22 +2W = 18

20W -22 = 18

20W = 40

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3 years ago

The ratio of men to women working for a company is 3 to 5 . if there are 140 women working for the company, what is the total nu

Naddika [18.5K]

Ratio of men : women = 3 : 5

Find total parts:

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3 years ago