really hard!!

really hard!!

1/2 log3(x)−2log3(y)−log3(z)

solve using gaussian elimination with matrices x+y-3z=4 4x+5y+z=1 2x+3y+7z=-7

solve using gaussian elimination x+3y+4z=1 3x+4y+5z=3 x+8y+11z=2

solve using substitution or elimination 3x+5y=2 2x-y=-3

A culture of bacteria originally numbers 250. after 3 hours there are 900 bacteria present. assuming exponential growth how long will it take until 10,000 bacteria are present?

a substance has a half-life of 50 years if 300 kilograms are present initially how much will remain after 15 years?

how long will it take $1,000 to grow to $1,700 earning a 5.5% interest rate compounded continuously?

Use the Intermediate Value Theorem to determine whether the polynomial function has a real zero between the given integers. 15) f(x) =6x5 - 9x3 + 10x2 + 7; between -2 and -1

Calculate the complex number division (5-3i)÷(4+3i) and write your answer in standard complex number form a+bi.

Find the exact value of 5log5(2k), where k is a positive constant. Show your work.

Find the exact value of logpi (1/pi). Show your work.

Simplify the algebraic expression y^2(y^-2+19)+3y-5+8^0. Do not leave negative exponents. Show your work.

IS there anyone who can solve this? plzplzplzplzplz

x+1=√3x+√7

You need to rent a moving truck for two days. Rider Moving Trucks charges $50 per day and $.50 per mile. UMove Trucks charges $45 per day and $0.75 per mile. Write an equation describing each...

determine the real solutions to the system of nonlineat equations x+y=1 y=x2-5

use the substitution method or the elimination method to solve the following system. 5x-30y=15 -7x+42y=-21

Write an equation in standard form of the parabola that has the same shape as the graph of f(x)=8x^2 or g(x)=-8x^2, but with the given maximum or minimum. Maximum=3 at x=-2"

Food and clothing are shipped to victims of a natural disaster. Each carton of food will feed 14 people, while each carton of clothing will help 6 people. Each 20-cubic-foot box of food weighs 40...

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