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3 years ago

Andre’s apartment is 800 square feet. If he wants to carpet 40% of it, how much carpet will he need?

Mathematics

2 answers:

alekssr [168]3 years ago

6 0

Answer:

Carpet needed = 320 square feet.

Step-by-step explanation:

Given: Andre’s apartment is 800 square feet. If he wants to carpet 40% of it.

To find: How much carpet will he need .

Solution: We have given that

Andre’s apartment = 800 square feet .

Andre wants to carpet 40% of 800 square feet .

According to question

carpet needed = 40% of 800.

Carpet needed = $\frac{40*800}{100}$ .

Carpet needed = 320 square feet.

Therefore , Carpet needed = 320 square feet.

Taya2010 [7]3 years ago

4 0

320 square feet are needed to cover 40%

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Write the equation in point-slope form of the line that passes through the given point and has the given slope (4,-7); m= -1/4

kicyunya [14]

Answer:

y + 7 = -1/4(x - 4)

General Formulas and Concepts:

Algebra I

Point-Slope Form: y - y₁ = m(x - x₁)

x₁ - x coordinate
y₁ - y coordinate
m - slope

Step-by-step explanation:

Step 1: Define

Slope m = -1/4

Point (4, -7)

Step 2: Write Function

y + 7 = -1/4(x - 4)

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3 years ago

The graph below shows the value of Edna's profits f(t), in dollars, after t months:

umka21 [38]

Since we know that the graph of our quadratic function has x-intercepts at (6,0) and (18,0), $x=6$ and $x=18$ are the zeroes of our quadratic. To find our quadratic we are going to factor each zero backwards and multiply them:
$x=6$
$x-6=0$
$x=18$
$x-18=0$

$(x-6)(x-18)=x^{2}-6x-18x+108$
$=x^{2}-24x+108$

Now that we have our quadratic function, we are going to use the average formula: $m= \frac{f(9)-f(3)}{9-3}$
$where$
$f(9)$ is the function evaluated at the 9th month
 $f(3)$ is the function evaluated at the 3rd month

$m= \frac{f(9)-f(3)}{9-3}$
$m= \frac{[9^{2}-24(9)+108]-[3^{2}-24(3)+108]}{9-3}$
$m= \frac{-27-45}{6}$
$m= \frac{-72}{6}$
$m=-12$

We can conclude that the closest approximate average rate of change for Edna's profits from the 3rd month to the 9th month is: B. −11.63 dollars per month.