Mathematics

Maths, cosine rule help

The question is asking, If a triangle has the sides d (19.6metres), e (13.2 metres) and f (10.4 metres) What is the size of the angle EDF? Help please?-side d is that one which is opposite angle EDF

Logarithms properties help !

how to solve this ! 1. log(x^2+17)base3 = 4 2. log base2 (log 3 base9) = log 6 base x 3. log x base7 = 2log 6 base7 - log 4 base 7 4. log 6 base2 + log x base 2 = log 3 base 2 + log 10 base 2-1. x

Personal Finance Help (10 POINTS!)

1. Ralph Phillips obtained a 12-months, $1,500.00 loan at 12 percent from his credit union. His monthly payment is $133.20. For the first payment: - What is the interest? - What is the payment to pr

Help with calculus final review

My teacher gave us a review for our final and I have the answers to all of the questions but two which i am having a little difficulty working out. Please help me with these problems by showing how th

What is the result of log3/log3

log3/log3 = 1 because both the exponents of the logarithms cancel each other. -Thank you!--1. Dividing something by itself will always yield one.-1

Interestin Math Problem....

Three boats met at point O,1st boat went to north, 2nd went to east and 3rd went to south.The three boats sailed for 2 hours, when they stopped and arrived in points ABC, which make a right angle tria

How many ways are there of comparing x objects out of a total of y

I know this is (very) basic, but its a long time since I did this. What is the mathematical calculation that tells you how many different ways you can compare x objects from a total of y (e.g. how man

Can anyone figure this out

(5+x)x=6^2-5x+x^2=36 x^2+5x-36=0 (x+9 ) (x-4) = 0 x = -9, x = 4 (probably reject -9 since it is negative) so x = 4 is the final answer-x can be -9 or it can be 4. Both are solutions to the equation.

Find the measure of angle x

triangle xyzis isosceles. The base angles, angle x and angle y, are four times the measure of the vertex angle, angle Z .-x = 4z y = 4z x + y + z = 180 4z + 4z + z = 180 9z = 180 z = 180/9 z = 20 x =

Math Help! Precalculus, how do you solve these problems

Find the 3 missing parts: (they are triangles) 1. A: 70 degrees c: 36 a: 25 (Find B,b,C) 2. C: 13 degrees A: 22 degrees c: 9 (Find a,B,b) 3. X: 138 degrees y: 15in z: 25in (Find x, Y, Z) 4. p: 28km q:

How to solve this math problems? (Pre-calc)

A straight tunnel is to be dug through a hill. Two people stand on opposite sides of the hill where the tunnel entrances are to be located. Both can see a stake 530m away from the first person and 255

(7 + 4y)^2 for y = -2

Pretty simple i know but what im asking is this you see how theres the 4 then the y right next to each other ?? i dont get it do i just add the -2 in like -42?? or do i multiply the -2 onto the 4

Concave Mirror magnification equation(question)help

please help, thanks! 2. A dancer is applying make-up using a concave mirror. The dancers face is 35 cm in front of the mirror, and the image is 72 cm behind the mirror. Use the mirror equation to ca

Algebra 2 need help. Sequences and Series.

What is the first six terms of each of these sequences. 1. ) an=6-n 2.) f(n)=n^3+2 3.) an=4^(n-1)-1) a1 = 6 - 1 = 5 a2 = 6- 2= 4 . . a6 = 6-6 =0 2) f(1) = 1^3+2 = 3 f(2) = 2^3+2=10 . . . f(6) = 6^

I need help with a Trig problem (maths)

The question is like this: Find sinx (without using a calculator) if you know that tanx=-2*(sqrroot)2. 90-We know that sin^2 x + cos^2 x = 1 for any angle x. Assuming cosx =/= 0, we divide by cos^2 x