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3 years ago

Aswer to expand 3(n+7)

Mathematics

2 answers:

Yakvenalex [24]3 years ago

6 0

3n+21 because of distributive property.

Charra [1.4K]3 years ago

5 0

3n + 21
n=7
................

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If 7 gallons of paint are needed to paint 4 rooms. How many gallons of paint will they need to paint 11? set up the proportion t

charle [14.2K]

Given the information, we have a direct proportionality. Then, the proportions would be:

$\frac{7}{x}=\frac{4}{11}$

solving for x we get the following:

$\begin{gathered} \frac{7}{x}=\frac{4}{11} \\ \Rightarrow7=\frac{4}{11}\cdot x \\ \Rightarrow\frac{7}{\frac{4}{11}}=x \\ \Rightarrow x=\frac{11\cdot7}{4}=\frac{77}{4}=19\frac{1}{4} \\ x=19\frac{1}{4} \end{gathered}$

therefore, to paint 11 rooms, we will need 19 1/4 gallons of paint

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1 year ago

1. Chapter ma2pe08r, Section .72, Problem 012 (ID: 012.07.2 - MC - MANK08) David tunes pianos in his spare time for extra income

nydimaria [60]

Answer:

Option C. $30

Step-by-step explanation:

As per question buyers are willing to pay $135 per tuning. If David demands more than this amount producer will not choose David to tune.

As we can see on first week David is willing to tune the first piano for $115,

So surplus for producer will be

135 - 115 = $20

Surplus for second week for producer will be

135 - 125 = $10

Since David is willing to tune the third and fourth piano for $140 and $175 then the producer will not choose David for tuning.

Therefore, total surplus for the producer will be $20 + $10 = $30

Option C. $30 is the correct option.

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3 years ago

What is the common ratio for the sequence 28,14,7,3.5 ?

wolverine [178]

Answer:

Its 2

Step-by-step explanation:

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3 years ago

The equation of the graphed line in slope point form using the point (2,-1 ) is blank and it’s equation in slope intercept is bl

valkas [14]

Answer:

$y=\frac{1}{4}x-\frac{3}{2}$ (Slope intercept form)

$y+1=\frac{1}{4}(x_-2)$ (Slope point form)

Step-by-step explanation:

The slope of the line can be calculated as following:

$m=\frac{-1-(-2)}{2-(-2)}=1/4$

The the equation of the line in slope point form is:

$y-y_1=m(x_-x_1)$

Where ( $x_1$ , $y_1$ ) is a point of the line.

Then you must susbtitute the point given and the slope and you obtain:

$y+1=\frac{1}{4}(x_-2)$

The intercept form is:

$y=mx+b$

Where b is the y-intercept.

Solve for y from the equation of the line in slope point form obtained above, then:

$y+1=\frac{x}{4}-\frac{2}{4}\\y=\frac{1}{4}x-\frac{2}{4}-1\\y=\frac{1}{4}x-\frac{3}{2}$

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3 years ago

Which function increases by 1/3 every time the X increases by 1?

Olegator [25]

Answer: The correct answer is y = 1/3 x +1

Step-by-step explanation:

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4 years ago