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3 years ago

(5x + 2) - (-9x - 2) O 11x2 – 5x + 8 14x + 4 –6x2 + 8x 7 -X2 + 6

Mathematics

2 answers:

alexandr1967 [171]3 years ago

8 0

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{14x + 4}}}}}$

Step-by-step explanation:

$\sf{(5x + 2) - ( - 9x - 2)}$

When there is a ( - ) sign in front of an parentheses in an expression , change the sign of each term in the expression. Also, remove the parentheses

$\dashrightarrow{ \sf{5x + 2 + 9x + 2}}$

Collect like terms

$\dashrightarrow{ \sf{14x + 2 + 2}}$

Add the numbers : 2 and 2

$\dashrightarrow{ \sf{14x + 4}}$

Hope I helped!

Best regards! :D

Rom4ik [11]3 years ago

7 0

Answer:

(5x + 2) - (-9x - 2)

O 11x2 – 5x + 8

14x + 4

–6x2 + 8x 7

-X2 + 6

Step-by-step explanation:

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Mrs. Jones has a local bakery. Last week this expression shows how many peanut butter cupcakes she baked. 5 (2x -4) + 3(3 + 4x)

Natasha_Volkova [10]

Answers:

A: 11(2x-1)

B: 121 cupcakes

Step-by-step explanation:

We have the following expression that models the quantity of cupcakes Mrs. Jones baked last week:

$5(2x -4) + 3(3 + 4x)$

Applying distributive property:

$10x-20+9+12x$

Grouping similar terms:

$22x-11$

Applying common factor $11$ :

$11(2x-1)$ This is the simplified expression

Now that we have the simplified expresion, we have to evaluate how many cupcakes did Mrs. Jones bake if $x=6$ :

$11(2(6)-1)$

$11(12-1)=11(11)=121$ Hence, Mrs. Jones baked 121 cupcakes last week

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3 years ago

Use the Parabola tool to graph the quadratic function. f(x)=2x^2−12x+19 Graph the parabola by first plotting its vertex and then

Debora [2.8K]

To find the vertex of our parabola, we are going to use the vertex formula: For a quadratic of the form $f(x)=x^2+bx+c$ it vertex $(h,k)$ is given by $h= \frac{-b}{2a}$ , $k=f(h)$ .
We can infet from our parabola that $a=2$ and $b=-12$ . So lets replace those values in our formula:
$h= \frac{-b}{2a}$
$h= \frac{-(-12)}{2(2)}$
$h= \frac{12}{4}$
$h=3$
$k=f(h)=2(3)^2-12(3)+19$
$k=2(9)-36+19$
$k=18-17$
$k=1$
The vertex $(h,k)$ of our parabola is $(3,1)$

Now to find our second point, we are going to evaluate our parabola at $x=0$
$f(0)=2(0)^2-12(0)+19$
$f(0)=0+0+19$
$f(0)=19$
Our second point is $(0,19)$

We can conclude that we can graph the parabola $f(x)=2x^2-12x+19$ using its vertex $(3,1)$ and the point $(0,19)$ as follows:

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3 years ago

Which expression shows the prime factorization of 36?

Svetradugi [14.3K]

36....we need to break this down...12 * 3 = 36
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3 years ago

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Step-by-step explanation:

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3 years ago

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prohojiy [21]

<h3>Answer: C) nonmetal</h3>

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Side note: Metalloids are a collection of elements where they share properties of metals and nonmetals (in a way they're on the fence).

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3 years ago

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