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2 years ago

9

Three times the sum of a number and four and five

1 answer:

BabaBlast [244]2 years ago

6 0

Answer:

3x+27

Step-by-step explanation:

3(x+4+5)=

3x+12+15=

3x+27

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f(x) = 500(1.05)x What was the average rate of change of the value of Sophia's investment from the second year to the fourth yea

hjlf

$\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\
f(x)=500(1.05)^x \qquad 
\begin{cases}
x_1=2\\
x_2=4
\end{cases}\implies \cfrac{f(4)-f(2)}{4-2}
\\\\\\
\cfrac{[500(1.05)^4]~-~[500(1.05)^2]}{4-2}\implies \cfrac{56.503125}{2}\implies 28.2515625$

6 0

3 years ago

F(x) = 4x - 1 when x = 1

ohaa [14]

Answer:

Step-by-step explanation:

f(x)=4x-1 x=1

f(x)=4(1)-1

f(x)=4-1

f(x)=3

3 0

2 years ago

Read 2 more answers

What is x when the equation is -x - 14 = -2

lukranit [14]

Answer:

x = -12

Step-by-step explanation:

Add 14 to -2 because you want to remove -14 and leave x alone.

14 + -2 = 12

-x = 12

Remove the negative sign by dividing both sides by negative 1

x = -12

8 0

3 years ago

Read 2 more answers

Marhannah must make a costume for the school play. She needs a piece of fabric that’s is 8/3 yards long and 3/2 yards wide. What

Softa [21]

Answer:

Our material is 54" wide. Here is a helpful chart to help you quickly convert linear yards into inches and feet.

How big is one linear yard of fabric?

Yards Length Width

3 108 Inches (9 Feet) 54 Inches (4.5 Feet)

4 144 Inches (12 Feet) 54 Inches (4.5 Feet)

Step-by-step explanation:

C A R R Y

O N

L E A R N I N G

3 0

1 year ago

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The area of a rectangular wall of a barn is 216 square feet. Its length is 6 feet longer than twice its width. Find the length a

PSYCHO15rus [73]

Answer:

Length is 24 feet and width is 9 feet.

Step-by-step explanation:

It is given that length of a rectangular wall is 6 feet longer than twice its width.

Let x feet be the width of wall.

Length = 2x+6 feet

Area of rectangle is

$A=length \times width$

$A=(2x+6)\times x$

$A=2x^2+6x$

It is given that area of a rectangular wall of a barn is 216 square feet.

$2x^2+6x=216$

$x^2+3x=108$

$x^2+3x-108=0$

Splitting the middle term, we get

$x^2+12x-9x-108=0$

$x(x+12)-9(x+12)=0$

$(x+12)(x-9)$

$x=-12,9$

Width can not be negative. So width is 9 feet.

Length $=2(9)+6=18+6=24\text{ feet}$

Therefore, length is 24 feet and width is 9 feet.

8 0

2 years ago