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4 years ago

Solve the following and answer if it is true or false - would you flip the sign?

Mathematics

2 answers:

aleksandrvk [35]4 years ago

8 0

True , you first move the constant to the right. and then calculate . and after you divide both sides and flip the sign

Volgvan4 years ago

3 0

Let's solve your inequality step-by-step.
−7n + 6 ≥ − 43

Step 1: Subtract 6 from both sides.
−7n + 6 − 6 ≥ −43 − 6 − 7n ≥ −49

Step 2: Divide both sides by -7.
−7n − 7 ≥ −49 − 7n ≤ 7

So, true

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In 2012 there were approximately 8,950 public libraries in the United States. A survey found that 76% of those libraries offered

choli [55]

Answer:

6,440

Step-by-step explanation:

i just did the math for this

5 0

3 years ago

the population of a city has decreased by 36% since it was last measured. if the current population is 17600 what was the previo

Savatey [412]

Answer:

23,936

Step-by-step explanation:

so get your 17600 times it by 0.36 which gets you 6,336 then add that to 17,600 =23,936

That's how you get your answer

5 0

3 years ago

Y = 5x^2 - 10<br> what is the rate of change ?<br> is the function linear or non linear ? why ?

Svetlanka [38]

Answer:

Step-by-step explanation:

Are you in Calculus? These are calculus concepts!

To calculate the rate of change here you must specify an interval, e. g., "what is the rate of change on the interval (0, 3)?"

If you know calculus: The 'rate of change' on the interval (a, b) is

f(b) - f(a)

r. of c. = --------------------

b - a

Have you used this formula before?

Because of the 'x^2' term this is NOT a linear function.

If you want more explanation, provide an interval on which you want the average rate of change and ask specific questions of your own.

6 0

3 years ago

Find equations of the tangent plane and the normal line to the given surface at the specified point. x + y + z = 8exyz, (0, 0, 8

Dima020 [189]

Let $f(x,y,z)=x+y+z-8e^{xyz}$ . The tangent plane to the surface at (0, 0, 8) is

$\nabla f(0,0,8)\cdot(x,y,z-8)=0$

The gradient is

$\nabla f(x,y,z)=\left(1-8yze^{xyz},1-8xze^{xyz},1-8xye^{xyz}\right)$

so the tangent plane's equation is

$(1,1,1)\cdot(x,y,z-8)=0\implies x+y+(z-8)=0\implies x+y+z=8$

The normal vector to the plane at (0, 0, 8) is the same as the gradient of the surface at this point, (1, 1, 1). We can get all points along the line containing this vector by scaling the vector by $t$ , then ensure it passes through (0, 0, 8) by translating the line so that it does. Then the line has parametric equation

$(1,1,1)t+(0,0,8)=(t,t,t+8)$

or $x(t)=t$ , $y(t)=t$ , and $z(t)=t+8$ .

(See the attached plot; the given surface is orange, (0, 0, 8) is the black point, the tangent plane is blue, and the red line is the normal at this point)

4 0

3 years ago

What does (-x)+(-x)+(-x)=

Mazyrski [523]

Answer:

-3x

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers