Which property is this?<br><br> (x+15)+3=x+(15+3)

Can someone please help me, this is for summer school and I need fast replies, I have 29 other question like these, please help.

Yuri [45]

$\implies {\blue {\boxed {\boxed {\purple {\sf { \: A. \:- 8 {v}^{4} + 3 {v}^{3} + v + 5}}}}}}$

$\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}$

$(4 + 6v + 3 {v}^{3} ) - (5v + 8 {v}^{4} - 1)$

➼ $\: 4 + 6v + 3 {v}^{3} - 5v - 8 {v}^{4} + 1$

Combining like terms, we have

➼ $\: - 8 {v}^{4} + 3 {v}^{3} + 6v - 5v + 4 + 1$

➼ $\: - 8 {v}^{4} + 3 {v}^{3} + v + 5$

<h3 />

$\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}$

7 0

3 years ago

Which shows <br> Will marked whos the brainliest !

Blababa [14]

The question is which figure shows ∠ POQ.

The answer is the option A.

Justification:

The notation ∠ POQ means angle POQ. And that means:

1) the vertex of the angle is the point O (this is the letter at the center of the name).

2) The sense of the measure is from P to Q counter clockwise.

That is what the figure A shows.

The figue B shows ∠ OQP, the figure C shows ∠QPR, and the figure D shows ∠QRP

6 0

3 years ago

What is the volume of an equilateral triangular prism?

Nata [24]

Actually, the "slant height" is 4, but the vertical height or "altitude" of the equilateral triangle is not 4

but anyway..... $\bf \begin{array}{cllll}
\textit{height of an equilateral triangle}\\\\
h=\cfrac{s\sqrt{3}}{2}\\
----------\\
\textit{area of an equilateral triangle}\\\\
A=\cfrac{s^2\sqrt{3}}{4}
\end{array}\qquad s=\textit{length of one side}$

and the volume, is the area of the triangle, times the length, so, whatever you get for the area of the triangle * 10

6 0

3 years ago

What is the area of a 45 degree sector of a circle with a radius of 12 in.

Elodia [21]

given ,

a circle of radius 12 inches

and $\theta$ = 45°

now we know that ,

$\\{Area \: of \: sector = \frac{\theta}{360\degree} \times \pi \: r {}^{2} } \\ \\$

let's now plug in the values of radius and theta as 12 inches and 45° respectively ,

$\\\dashrightarrow \: \frac{45}{360} \times \frac{22}{7} \times 12 \times 12 \\ \\ \dashrightarrow \: \frac{1}{8} \times \frac{22 \times 12 \times 12}{7} \\ \\ \dashrightarrow \: \frac{22 \times 12 \times 12}{56} \\ \\ \dashrightarrow \: \frac{3168}{56} \\ \\ \dashrightarrow \: 56.57 \: inches {}^{2} (approx.)$

hope helpful :D

6 0

3 years ago

Solve the simultaneous equations

Contact [7]

Answer:

The solution for given system of equations is: x = 6 and y = 3

Or

(6,3)

Step-by-step explanation:

Given equations are:

$3x+4y=30\ \ \ Eqn\ 1\\3x-y=15\ \ \ \ Eqn\ 2$

There are three methods to solve simultaneous equations

Elimination
Substitution
Co-efficient method

We will use the elimination method as the coefficients of x in both equations are already same

Subtracting equation 2 from equation 1

$3x+4y - (3x-y) = 30-15\\3x+4y-3x+y = 15\\5y = 15\\\frac{5y}{5} = \frac{15}{5}\\y = 3$

Putting y = 3 in equation 2

$3x-3 = 15\\3x = 15+3\\3x = 18\\\frac{3x}{3} = \frac{18}{3}\\x = 6$

Hence,

The solution for given system of equations is: x = 6 and y = 3

Or

(6,3)

7 0

3 years ago

Which property is this? (x+15)+3=x+(15+3)