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mestny [16]
3 years ago
9

Simplify -2[9-(x+7)]

Mathematics
2 answers:
Oksanka [162]3 years ago
8 0

Answer:

Simplify the expression.

2 x − 4

Lubov Fominskaja [6]3 years ago
8 0

\bold{-2[9-(x+7)] = -4+2x}

<u>Solution:</u>

Given, -2[9-(x+7)]

According to the BODMAS rule,

Multiplying the sign inside the brackets we get,

\Rightarrow -2[9-x-7]

On subtracting 9 from 7 we get,

\Rightarrow -2[2-x]

On multiplying (-2) inside the brackets,

\Rightarrow -2\times2-(-2\times x) (distributive property)

\Rightarrow (-4+2\times x)

\Rightarrow (-4+2x)

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Plz help out i am so confused
MatroZZZ [7]

Answer:

Me too not trying to get the points but how are u suppose to solve this anyway

Step-by-step explanation:

8 0
3 years ago
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Solve x^2 + x - 12 = 0
bogdanovich [222]

Answer:

x₁ = -4

x₂ = 3

Step-by-step explanation:

x²+ x + 12 = 0

x = {-1±√((1²)-(4*1*-12))} / (2*1)

x = {-1±√(1+48)} / 2

x = {-1±√49} / 2

x = {-1±7} / 2

x₁ = {-1-7} / 2 = -8/2 = -4

x₂ = {-1+7} / 2 = 6/2 = 3

Check:

x₁

-4² + (-4) - 12 = 0

16 - 4 - 12 = 0

x₂

3² + 3 - 12 = 0

9 + 3 - 12 = 0

6 0
1 year ago
Samantha spent 40 minutes on homework. Sixty percent of that time was spent on language arts.how many minutes were spent on lang
yan [13]
If you would like to know how many minutes were spent on language arts, you can calculate this using the following steps:

60% of 40 minutes = 60% * 40 = 60/100 * 40 = 24 minutes

The correct result would be: 24 minutes were spent on language arts.
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3 years ago
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Help please !! Solve -1.6r+5= -7.8
Nikolay [14]

subtract 5 from both sides. -1.6r=-5 divide both sides by-1.6. r=-5/-1.6 simp;ify-5/1.6 to 3.125. r =3.125

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3 years ago
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(-4, -7) and (-6, 9) in slope-intercept form. Show work
BigorU [14]

Answer:

Equation of line in slope-intercept form is: y = -8x-39

Step-by-step explanation:

Given points are:

(-4, -7) and (-6, 9)

The slope-intercept form is given by the equation

y = mx+b

Here m is the slope of the line and b is the y-intercept.

m is found using the formula

m = \frac{y_2-y_1}{x_2-x_1}

Here

(x1,y1) = (-4-7)

(x2,y2) = (-6,9)

Putting the values in the formula

m = \frac{9+7}{-6+4} = \frac{16}{-2} = -8

Putting slope in general equation

y = -8x+b

Putting (-6,9) in the equation

9 = -8(-6)+b\\9 = 48+b\\b = 9-48\\b = -39

Putting the value of b we get

y = -8x-39

Hence,

Equation of line in slope-intercept form is: y = -8x-39

5 0
3 years ago
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