What is the answer for p/2=3/4+p/3

Answers

Answer 1

Answer: $(p)/(2)=(3)/(4)+(p)/(3)\ \ \ \ | multiply \ by \ 12\n\n6p=9+4p\ \ \ \ | subtract\ 4p\n\n2p=9\ \ \ \ | divide\ by\ 2\n\np=4,5\n\nSolution\ is\ p=4,5.$

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Need help with 13,
I don’t get it :/

Answers

USE SUBSTITUTION FOR 3A+4S=57, 2A+8S=86 to find adult=$7 student=$9
CHECK STEP: 3(7)+4(9)=57
21+36=57 TRUE

What subjects other than math that use ratios

Answers

Chemistry uses ratios all the time in all of the chemical formulas.

Another subject that uses ratio would be "Statistics"

Why does the term angle need to be defined prior to defining perpendicular lines?

Answers

Answer:

Perpendicular means "at right angles".

A line meeting another line at a right angle, or 90° is said to be perpendicular to it.

This is why we need to know what are angles first.

Angles are defined as the space between two intersecting lines close to the point where they meet.

So, when we say perpendicular lines meet at 90° angles, we must know the definition of angles.

Perpendicular lines are two or more lines that intersect at a 90-degree angle, like the two lines drawn on this graph, and the x and y axes that orient them.

Choose the correct simplification of the expression −5x2(4x − 6x2 − 3).30x4 − 20x3 + 15x2
−11x4 − x3 − 8x2
−30x4 + 20x3 − 15x2
30x4 + 20x3 + 15x2

Answers

If you would like to solve -5x^2 * (4x - 6x^2 - 3), you can do this using the following steps:

-5x^2 * (4x - 6x^2 - 3) = (-5x^2) * 4x - (-5x^2) * 6x^2 - (-5x^2) * 3 = -20x^3 + 30x^4 + 15x^2 = 30x^4 - 20x^3 + 15x^2

The correct result would be 30x^4 - 20x^3 + 15x^2.

Answer:

Option A is correct

$30x^4-20x^3+15x^2$