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3 years ago

-5(-x + 1) -3x -1 = -12 Solve for x please

Mathematics

2 answers:

adoni [48]3 years ago

6 0

X= -3 what the answers option

hjlf3 years ago

3 0

Answer:

Hello,

-5(-x + 1) -3x -1 = -12 ⇔ 5x - 5 - 3x - 1 = -12 ⇔ 2x - 6 = -12 ⇔ 2x = -6 ⇔ x = -3

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Solve for xx. Express your answer as a proper or improper fraction in simplest terms.

kati45 [8]

Answer:

4/5

Step-by-step explanation:

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4 0

2 years ago

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Can someone please help the question is ; find 75% of 192

natima [27]

Answer:

75% of 192 is 144

Step-by-step explanation:

The answer is 144 because 192 multiplied by 75% is 144.

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2 years ago

1.) Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth .x squared minus 21 x equals n

Andrew [12]

Part 1
We are given $x^2-21x=-4x$ . This can be rewritten as $x^2-18x=0$ .
Therefore, a=1, b=-18, c=0.
Using the quadratic formula
$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}=\frac{-\left(-18\right)\pm \sqrt{\left(-18\right)^2-4\left(1\right)\left(0\right)}}{2\left(1\right)}$
$x=\frac{18\pm 18}{2}$

The values of x are
$x_1=\frac{18-18}{2}=0$
$x_2=\frac{18+18}{2}=18$

Part 2
Since the values of y change drastically for every equal interval of x, the function cannot be linear. Therefore, the kind of function that best suits the given pairs is a quadratic function.

Part 3.
The first equation is $y=x^2+2$ .
The second equation is $y=3x+20$ .

We have
$x^2+2=3x+20$
$x^2-3x-18=0$
Factoring, we have
$\left(x-6\right)\left(x+3\right)=0$
Equating both factors to zero.
$x_1-6=0\rightarrow x_1=6$
$x_2+3=0\rightarrow x_2=-3$

When the value of x is 6, the value of y is
$y=3\left(6\right)+20=38$

When the value of x is -3, the value of y is
$y=3\left(-3\right)+20=11$

Therefore, the solutions are (6,38) or (-3,11)

7 0

2 years ago

Simplify the following expression. 2x-5(2x-7y+3)+(-8)

neonofarm [45]

<span>Equation at the end of step 1 :</span> (2x - 5 • (2x - 7y + 3)) + -8<span> :</span>Pulling out like terms :3.1 Pull out like factors :

-8x + 35y - 23 = -1 • (8x - 35y + 23)

Final result : -8x + 35y - 23

4 0

3 years ago

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Find the area of the rectangle as a single expression.

qwelly [4]

Answer:

D) $15x^2 +6x-48$

Step-by-step explanation:

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7 0

3 years ago