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3 years ago

Solve: For x 8 – 2x = 16

Mathematics

2 answers:

gtnhenbr [62]3 years ago

6 0

-2x = 16-8

-2x = 8

x = 8/-2

x = -4

QveST [7]3 years ago

3 0

Answer:

x = -4

Step-by-step explanation:

$8-2x=16\\\\8-8-2x=16-8\\\\-2x=8\\\\\frac{-2x=8}{-2} \\\\\boxed{x=-4}$

Hope this helps.

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I need help with this question

postnew [5]

Answer:

61 cm for each book shelf.

Step-by-step explanation:

First it gives you the width of the boxes so you add them together

132 + 108 + 94 = 334

so 334 cm has already been used out of 456 cm.

Next you will 456 - 334 = 122 cm left over

if they are building 2 book cases you with take what cm's you have left and divide it by 2

122 / 2 = 61

So that means each book case will be 61 cm's wide

7 0

4 years ago

Find the lenght of side BC. give your answer to 3 significant figures

Serga [27]

Answer:

BC ≈ 19.4 cm

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos71° = $\frac{adjacent}{hypotenuse}$ = $\frac{AB}{BC}$ = $\frac{6.3}{BC}$ ( multiply both sides by BC )

BC × cos71° = 6.3 ( divide both sides by cos71° )

BC = $\frac{6.3}{cos71}$ ≈ 19.4 cm ( to 3 significant figures )

3 0

4 years ago

The ranger of the function x2+2x-8is allá

allsm [11]

Answer:

$\mathrm{Range\:of\:}x^2+2x-8:\quad \begin{bmatrix}\mathrm{Solution:}\:&\:f\left(x\right)\ge \:-9\:\\ \:\mathrm{Interval\:Notation:}&\:[-9,\:\infty \:)\end{bmatrix}$

Step-by-step explanation:

As the function is

$x^{2} +2x-8$

As we know that domain is the set of input values for which the function is defined.

Therefore,

$\mathrm{Domain\:of\:}\:x^2+2x-8\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:-\infty \:$

And range is defined as:

The set of the dependent variable for which the function is defined.

$\mathrm{For\:a\:parabola}\:ax^2+bx+c\:\mathrm{with\:Vertex}\:\left(x_v,\:y_v\right)$

$\mathrm{If}\:a$

$\mathrm{If}\:a>0\:\mathrm{the\:range\:is}\:f\left(x\right)\ge \:y_v$

$a=1,\:\mathrm{Vertex}\:\left(x_v,\:y_v\right)=\left(-1,\:-9\right)$

$f\left(x\right)\ge \:-9$

Therefore,

$\mathrm{Range\:of\:}x^2+2x-8:\quad \begin{bmatrix}\mathrm{Solution:}\:&\:f\left(x\right)\ge \:-9\:\\ \:\mathrm{Interval\:Notation:}&\:[-9,\:\infty \:)\end{bmatrix}$

The graph is also attached below.

Keywords: graph, domain, range

Learn more about domain and range from brainly.com/question/13856645

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8 0

3 years ago

If y= 1/2x and x = -14 find y

Minchanka [31]

Answer:

y = -7

Step-by-step explanation:

y = 1/2x

x = -14 (given)

y = 1/2 × (-14)

= -7

4 0

3 years ago

Read 2 more answers

Write (3i - 2/3) - (6i-5) as a complex number in standard form. I have no idea what im doing to be honest -_-. Give me pointers

allochka39001 [22]

$\bf \left( 3i-\cfrac{2}{3} \right)-(6i-5)\implies 3i-\cfrac{2}{3}-6i+5
\\\\\\
-6i+5-\cfrac{2}{3}\implies 
\begin{array}{llll}
\cfrac{13}{3}&-&6i\\
\uparrow &&\uparrow \\
a&-&bi
\end{array}$

standard form for a complex expression, I assume it means the a + bi form, nothing else

5 0

3 years ago

Read 2 more answers