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3 years ago

How do I solve this system of equations by adding, subtracting, or multiplying? x-y=8;x+y=12

1 answer:

Natasha2012 [34]3 years ago

7 0

By substitution.
Get y or x alone then insert it into the other equation solving for one of the two variables. After that substitute ur answer into one of the equations then solve.

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7 is greater than w, and w is greater than 2 use w only once in your inequality

Likurg_2 [28]

Your inequality would look like 7>w>2

6 0

3 years ago

Solve 5x(x-6)(4x+9)=0

xxTIMURxx [149]

Greetings and Happy Holidays!

Solve for x.
$5x(x-6)(4x+9)=0$ 

Distribute the parenthesis:
 $5x(x-6)(4x+9)=0$

$(5x^2-30x)(4x+9)=0$

$(20x^3-120x^2)+(45x^2-270x)=0$

Combine like terms:
$20x^3-75x^2-270x=0$

Factor out GCF (5x):
$5x(4x^2-15x-54)=0$

Factor the Complex Trinomial:
$5x(4x^2+9x-24x-54)=0$

$5x(x(4x+9)-6(4x-9))=0$

$5x((4x+9)(x-6))=0$

Set Factors to Equal 0:
$5x=0$

$x=0$

or

$4x+9=0$

$4x=-9$

$x=\frac{-9}{4}$

or

$x-6=0$

$x=6$

The Answers Are:
$\boxed{x=0} \\ \boxed{x= \frac{-9}{4}} \\ \boxed{x=6}$

I hope this helped!
-Benjamin

8 0

3 years ago

A dice is rolled 4 times. What is the probability of showing a 6 on every roll?

Oliga [24]

Answer:

1/6

Step-by-step explanation:

If the dice is rolled 4 times than the probability you will roll a 6 is 1/6 since there are only six numbers

3 0

3 years ago

Help please!! Just need C (don't worry about the background shapes)

horrorfan [7]

I think not fpr sure though

8 0

3 years ago

If you save $3,000 at an interest rate of

juin [17]

Amount earned in compound interest = P(1 + r)^n; where P is the principal, r is the rate and n is the number of periods.

Amount = 3,000(1 + 14%)^6 = 3,000(1 + 0.14)^6 = 3,000(1.14)^6 = $6,584.91

7 0

3 years ago

Read 2 more answers