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4 years ago

Which expression is equivalent to the expression below? Select all that apply.

1 answer:

7 0

$-\dfrac{2}{5}(15-20d+5c)\qquad\text{use distributive property}\\\\=\left(-\dfrac{2}{5}\right)(15)+\left(-\dfrac{2}{5}\right)(-20d)+\left(-\dfrac{2}{5}\right)(5c)\\\\=(-2)(3)+(-2)(-4d)+(-2)(c)\\\\=-6+8d-2c\\\\Answer:\\\\\boxed{B.\ -6+8d-2c}\\\boxed{C.\ -2c+8d-6}$

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What is the value of the expression when n = 3?

inysia [295]

The value of expression when n = 3 is 22

Solution:

Given expression is:

$\frac{6(n^2 + 2)}{n}$

We have to find the value of expression when n = 3

Substitute n = 3 in given expression

$\rightarrow \frac{6(3^2 + 2)}{3}\\\\Simplify\ the\ above\ expression\\\\\rightarrow \frac{6(9+2)}{3}\\\\Solve\ the\ terms\ inside\ the\ bracket\\\\\rightarrow \frac{6(11)}{3}\\\\Divide\ 6\ by\ 3 \\\\\rightarrow 2 \times 11 = 22$

Thus the value of expression when n = 3 is 22

3 0

3 years ago

please help I am so stuck on this! 100 points and brainiest the choices for each question are in the second attachment

77julia77 [94]

Answer:

Step-by-step explanation:

(A) Definition of Supplementary angles

(B) Distributive property

(D) Reflexcive property

(E) Division property of equality

7 0

3 years ago

Read 2 more answers

F(x)=-2(x-1)^2+2 a) standard form b) graph

OverLord2011 [107]

Answer:

a) f(x) = -2x² + 4x

Explanation:

To find the standard form we need to solve the equation as:

$\begin{gathered} f(x)=-2(x-1)^2+2 \\ f(x)=-2(x^2-2x+1)+2 \\ f(x)=-2x^2-2(-2x)-2(1)+2 \\ f(x)=-2x^2+4x-2+2 \\ f(x)=-2x^2+4x \end{gathered}$

So, the standard form is f(x) = -2x² + 4x

To make the graph we will use the initial form because when the equation is written like f(x) = a(x-h)²+k, the coordinate (h,k) is the vertex of the parabola

So, in this case, the vertex of the parabola is the point (1, 2)

On the other hand, we can find a point in the graph. For example, if x is equal to 0, then f(x) is equal to:

f(x) = -2(x-1)² + 2

f(0) = -2(0-1)² + 2

f(0) = -2(-1)² + 2

f(0) = - 2 + 2

f(0) = 0

So, the parabola passes through the point (0,0) and has a vertex in the point (1, 2). Then, the graph is:

4 0

2 years ago

If ABCD is a parallelogram, BC =3m + 10, and AD = 7m – 2, find the value of ‘m’. *

-BARSIC- [3]

Answer:

The value of m is 3

Step-by-step explanation:

We are given that ABCD is a parallelogram

Property of parallelogram : Opposite sides of parallelogram is equal

So, AB = CD and BC = AD

We are given that

BC =3m + 10

AD = 7m – 2

So, Using Property

BC=AD

3m+10=7m-2

12=4m

$\frac{12}{4}=m$

3=m

Hence The value of m is 3

8 0

4 years ago

Ronny is selling coffee mugs for $6.00. So far, he has earned $492.00. Ronny needs to earn more than $636.00 in order to

Jet001 [13]

Answer:

Step-by-step explanation:

Needs to sell 24 more mugs to reach his goal

7 0

3 years ago