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3 years ago

-9x5 + 36x4 + 189x3 in factored form

Mathematics

1 answer:

Lera25 [3.4K]3 years ago

4 0

Answer:

Step-by-step explanation:

-9x^3(x^2 - 4x - 21) =

-9x(x - 7)(x + 3) <===

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Helpppppppppppppppp please y’all

max2010maxim [7]

$\sf{3. \ \ Given : \dfrac{2}{3} - \dfrac{5}{4} + \dfrac{7}{2}}$

Let us solve the first two fractions : The LCM of 3 and 4 is 12

$\sf{\implies \dfrac{4(2) - 5(3)}{12} + \dfrac{7}{2}}$

$\sf{\implies \dfrac{8 - 15}{12} + \dfrac{7}{2}}$

$\sf{\implies \dfrac{-7}{12} + \dfrac{7}{2}}$

LCM of 2 and 12 is 12

$\sf{\implies \dfrac{-7 + 7(6) }{12}}$

$\sf{\implies \dfrac{-7 + 42}{12}}$

$\sf{\implies \dfrac{35}{12}}$

$\sf{\implies 2 +\dfrac{11}{12}}$

$\sf{\implies 2 \dfrac{11}{12}}$

---------------------------------------------------------------------------------------

$\sf{4. \ \ Given : \dfrac{(2 - 7)^2 + 5}{3}}$

$\sf{\implies \dfrac{(-5)^2 + 5}{3}}$

$\sf{\implies \dfrac{25 + 5}{3}}$

$\sf{\implies \dfrac{30}{3}}$

$\sf{\implies 10}$

7 0

2 years ago

Read 2 more answers

Alexis put $2000 in a savings account. After 4 years, she had $2543 in the account. What rate of interest did she earn? Use the

Flauer [41]

This is substitution, it's very simple once you get the hang of it!

okay, what you want to do is plug in the numbers you already have, to get the number you don't have(r).

First, you plug in the numbers.

1. P= $2000
A=$2543
t= 4(years)
r=?

2543=2000^r(4)

Secondly, you want to solve the equation.

5 0

2 years ago

Read 2 more answers

Can you help with this math question?<br><br> 3c - 3(6 - 2c) = 27

KonstantinChe [14]

Answer:

C = 5

Step-by-step explanation:

Distribute the 3

3c - 18 + 6c = 27

Adding like terms

9c - 18 = 27