3 years ago

Solve the system of equations by substitution. What is the solution for x?

1 answer:

4 0

2x+y=1
4x+2y=-2

Solve by substitution:
y=1-2x

Plug in (1-2x) for y:
4x+2(1-2x)=-2
4x+2-4x=-2
2=-2
No solutions

The answer is C) no solutions

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What is the lest common denominator of 1/12 and 5/8

Sonja [21]

The LCM is 24.
1/12=2/24
5/8=15/24

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3 years ago

Find the solution of 3 times the square root of the quantity of x plus 6 equals negative 12, and determine if it is an extraneou

Anna35 [415]

For this case we have the following equation:
$3 \sqrt{x+6}=-12$
Rewriting we have:
$\sqrt{x+6}= \frac{-12}{3}$
$\sqrt{x+6}=-4$
We raise both members of the equation to the square:
$(\sqrt{x+6})^2=(-4)^2$
Rewriting we have:
$x+6=16$
$x=16-6$
$x=10$
It's a extraneous solution because equality is not met by substituting x = 10 in the original equation:
$3 \sqrt{10+6}=-12$
$3 \sqrt{16}=-12$
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Answer:
The solution is:
$x=10$
It's a extraneous solution

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3 years ago

$200 in the bank account if she writes 6 checks for exactly $19.98 what expression describes the change in her bank account

Ad libitum [116K]

Step-by-step explanation:

$200 - 6 \times 19.98$