Ask question

Ask question

All categories

3 years ago

11

Dimitrius returned 5 library books last week, returned 3 books this week, then checked out 8 more books. He now has 12 library b

ooks. How many books did he have before last week?

1 answer:

frez [133]3 years ago

3 0

Easy, 12-8=4+3=7+5=12 So, he had 12 books before last week

You might be interested in

I'm pretty sure the answer's one, but I need an expression. I will give brainiest to whoever answers this!!!

givi [52]

Answer:

0x+1 (or just 1)

Step-by-step explanation:

if non shaded/ white tiles are negative, and shaded positive expression would look like:

2x+4 and -2x-3

when simplified 2x-2x cancels out, and 4-3=1.

what is left over is just 1.

3 0

3 years ago

Consider the surface defined by the equation x3 + y3 + z3 = 3xyz. Use implicit differ- ∂z entiation to find ∂x. (Note z is not a

Aloiza [94]

Answer:

$\frac{∂z}{∂x}=\frac{(3yz-3x^{2})}{3z^{2} -3xy}$

Step-by-step explanation:

Given equation is $x^{3}+y^{3}+z^{3}=3xyz$ ………………(1)

we use derivative formula $\frac{d}{dx}(x^{n}) = n x^{n-1}$

$\frac{d}{dx}(x^{3)} = 3 x^{2}$

$\frac{d}{dx}(z^{3)} = 3 z^{2}$

And also apply 'u v' formula

$\frac{d}{dx}(uv}) = u\frac{d}{dx}(v)+v\frac{d}{dx}(u)$

Differentiating equation (1) partially with respective to 'x' , we treated 'y' as constant.

$(3x^{2} +0+3z^{2}\frac{∂z}{∂x}) =3y(x\frac{∂z}{∂x}+z(1))$ ( here y treated as constant so the derivative of constant function is zero in addition but in multiplication the constant is keep as like 'y').

on simplification , we get

$(3x^{2} +0+3z^{2}\frac{∂z}{∂x}) =(3yx\frac{∂z}{∂x}+3yz)$

again simplification, we get

$3z^{2}\frac{∂z}{∂x}- 3yx\frac{∂z}{∂x}=3yz-3x^{2}$

taking common ' $\frac{∂z}{∂x}$ on left on side , we get

$(3z^{2}- 3yx)\frac{∂z}{∂x}=3yz-3x^{2}$

dividing ' $(3z^{2}- 3yx)$ on both sides, we get

$\frac{∂z}{∂x}=\frac{(3yz-3x^{2})}{3z^{2} -3xy}$

<u>Final answer</u>:-

$\frac{∂z}{∂x}=\frac{(3yz-3x^{2})}{3z^{2} -3xy}$

6 0

3 years ago

Fill 4x4 squares with 1-16 so that the sum of each row and column is a prime number

Korvikt [17]

2 ^ 4 lmk if I’m right

8 0

3 years ago

Someone help!! Will make brainliest (Algebra 2)

Licemer1 [7]

Answer:

pretty sure its the first one but i may be wrong!

4 0

3 years ago

Who has insta gram because I need help with my ela assignments and I need a good grade I’ll pay u 30$ cashapp or PayPal if it’s

Gennadij [26K]

Answer:

i can, what grade are you in though?

Step-by-step explanation:

8 0

3 years ago