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3 years ago

I’ll mark y brainlist for the correct answer!

Mathematics

2 answers:

inna [77]3 years ago

5 0

Answer:

16 / C

Step-by-step explanation:

-4 x -4 = 16

4 x 4 = 16

two negatives cancel out when multiplying, that is why it equals 16*

Lady_Fox [76]3 years ago

3 0

Answer:

Step-by-step explanation:

4×4=16

-4×-4=16

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Eric has a spinner that is divided into different colors colored sections that are the same size and shape on any spin the theor

jeka57 [31]

The answer is 1125(D)

3 0

4 years ago

Find the derivative of the function at P 0 in the direction of A. f(x,y,z) = 3 e^x cos(yz), P0 (0, 0, 0), A = - i + 2 j + 3k

Alik [6]

The derivative of $f(x,y,z)$ at a point $p_0=(x_0,y_0,z_0)$ in the direction of a vector $\vec a=a_x\,\vec\imath+a_y\,\vec\jmath+a_z\,\vec k$ is

$\nabla f(x_0,y_0,z_0)\cdot\dfrac{\vec a}{\|\vec a\|}$

We have

$f(x,y,z)=3e^x\cos(yz)\implies\nabla f(x,y,z)=3e^x\cos(yz)\,\vec\imath-3ze^x\sin(yz)\,\vec\jmath-3ye^x\sin(yz)\,\vec k$

and

$\vec a=-\vec\imath+2\,\vec\jmath+3\,\vec k\implies\|\vec a\|=\sqrt{(-1)^2+2^2+3^2}=\sqrt{14}$

Then the derivative at $p_0$ in the direction of $\vec a$ is

$3\,\vec\imath\cdot\dfrac{-\vec\imath+2\,\vec\jmath+3\,\vec k}{\sqrt{14}}=-\dfrac3{\sqrt{14}}$

3 0

4 years ago

The equilateral triangle shown is rotated about line a. Each side of the triangle measures 20 mm. What shape is created by the r

zysi [14]

Answer:

a cone with a base circumference of about 126 mm

Step-by-step explanation:

Rotating a triangle about a line results in a cone created by the rotation. This is because the segment at the bottom forms a circle, and the point at the top stays there; the three-dimensional figure with a circular base and a point at the top is a cone.

Since we rotate the segments about a line, this makes the length of the base the radius of the circle. This means the circumference would be

C = 2πr = 2(3.14)(20) = 125.6 ≈ 126 mm

3 0

3 years ago

Read 2 more answers

5x-3=21-x please someone answer

wolverine [178]

Answer:

X=4 Hope it helps Lol

Step-by-step explanation:

5*x-3-(21-x)=0

Step by step solution :

Step 1 :

Pulling out like terms :

1.1 Pull out like factors :

6x - 24 = 6 • (x - 4)

Equation at the end of step 1 :

Step 2 :

Equations which are never true :

2.1 Solve : 6 = 0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

2.2 Solve : x-4 = 0

Add 4 to both sides of the equation :

x = 4

One solution was found :

x = 4

5 0

3 years ago

Read 2 more answers

There are 49 students in a classroom with 8

Anna11 [10]

Answer:

The answer is B

Step-by-step explanation:

8 times 6 = 48

So 48 people will be able to sit down with one person left out.

8 0

3 years ago