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3 years ago

What is the value of the expression -3x^2y + 4x when x=-4 and y=2

Mathematics

1 answer:

8_murik_8 [283]3 years ago

8 0

Answer:-785

Step-by-step explanation:

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Luba_88 [7]

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4 years ago

If I have something like -x^2 when I plug the number in, will it be positive or negative and why

MrRissso [65]

The order of operations tells you exponentiation is done before multiplication or addition. That is, the value of x is squared before the sign is applied.

Your result will be negative for any non-zero value of x.

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3 years ago

Is 2/3 equal to 1/4?

MrMuchimi

Answer:

Step-by-step explanation:

2/3 in decimal is .6 repeating

1/4 in decimal is 0.25

therefore we cannot conclude that 2/3 is equal to 1/4

6 0

3 years ago

Read 2 more answers

Can anyone do this with steps ..

Harrizon [31]

$\\ \sf\longmapsto \displaystyle{\lim_{x\to 0}}\dfrac{sinx-sin3x}{sins3x-sinx}$

$\boxed{\sf \displaystyle\lim_{x\to 0}\dfrac{f(x)}{g(x)}=\dfrac{\lim_{x\to 0}f(x)}{\lim_{x\to 0}g(x)}}$

Now

$\\ \sf\longmapsto \displaystyle{\dfrac{\lim_{x\to 0}sinx-\lim_{x\to 0}sin3x}{\lim_{x\to 0}sin3x-\lim_{x\to 0}sinx}}$

$\boxed{\sf \displaystyle{\lim_{x\to 0}}f(x)=f(a)}$

$\\ \sf\longmapsto \dfrac{sin0-sin3(0)}{sin3(0)-sin0}$

$\\ \sf\longmapsto \dfrac{0-0}{0-0}$

$\\ \sf\longmapsto \dfrac{0}{0}$

$\\ \sf\longmapsto 0$

7 0

3 years ago

What value of n makes the equation n/3 - 2 = 4 true?<br> Show your work.

patriot [66]

Answer:

Step-by-step explanation:

n/3 - 2 = 4 Add 2 to both sides

n/3 - 2 + 2 = 4+2 Combine

n/3 = 6 Multiply both sides by 3

3*n/3 = 6 * 3

n = 18

7 0

3 years ago