Make p the subject of the formula. 4(p-2p)=3+2

Mathematics

1 answer:

liberstina [14]3 years ago

4 0

Answer:

p=-5/4

Step-by-step explanation:

expand brackets

4p-8p=3+2

simplify

-4p=5

divide by -4

p=-5/4

You might be interested in

Prove cotA+cotB+cotC >= square root of 3

Zigmanuir [339]

<span>Given cotA + cotB + cotC = sqrt3
to prove triangle ABC is equilateral
we prove this by assuming ABC to be equialteral and establishing the truth
of the statement cotA + cotB + cotC =sqrt3

since ABC is equialteral angleA=angleB=angleC=60 degrees
cotA=cotB=CotC = cot60= 1/sqrt3
therefore cotA + cotB + cotC = 1/sqrt3 + 1/sqrt3 + 1/sqrt3
=3/sqrt3
=sqrt3 which is equal to the RHS ( right hand side) of the expression
hence our assumption that ABC is equilateral is true</span>

7 0

3 years ago

The area of a circle, in terms of π, is 4πm2.Find the value of the radius

katen-ka-za [31]

<h3>Answer: 2</h3>

Work Shown:

A = pi*r^2

4pi = pi*r^2

4 = r^2

r = sqrt(4)

r = 2

The radius is 2 meters.

8 0

3 years ago

A third-grade class is told to send a valentine to every single one of their classmates. On Valentine’s Day, the class ends up w

FinnZ [79.3K]

306 is the total cards sent by all the students in the class. Lets say x is the number of students in class, therefore each student needs to send x-1 cards (since they do not send themselves a card). So depending on your level of math, you could either take the complex way to solve it using quadratic equations, or just find the number that if multiplied by itself then subtracted, gives you 306.
$(x \times x) - x = 306 \\ lets \: try \: 18 \\ (18 \times 18) - 18 = 306 \\ so \: x = 18$
===============
Complex way
$(x \times x) - x = 306 \\ {x}^{2} - x - 306 = 0$
So a = 1, b = -1, c=-306
using the quadratic equation:
$x = \frac{ - b + \sqrt{ {b}^{2} - 4ac } }{2a}$
$x = \frac{1 + \sqrt{1 - (4 \times 1 \times - 306)} }{2} \\ x = \frac{1 + \sqrt{1 - ( - 1224)} }{2} \\ x = \frac{1 + \sqrt{1225} }{2} \\ x = \frac{1 + 35}{2} \\ x = \frac{36}{2} \\ x = 18$