Answer:
a)8
b)11
Step-by-step explanation:
given to 23-14
23-3=contains meat
a. Monica has [tex]8[/tex] choices to order from because she dislikes Ham.
b. Andrew has [tex]32[/tex] choices to order from because he likes meat but dislikes mixed meats.
a. Since Monica dislikes Ham, she cannot choose any of the 15 choices that contain Ham. She has [tex]\(23 - 15 = 8\)[/tex] choices left to order from.
b. Andrew likes meat but dislikes mixed meats, which means he can choose from the choices that contain only one type of meat (Ham or Chicken) or the vegetarian options. There are [tex]15[/tex] choices with Ham, [tex]14[/tex] choices with Chicken, and [tex]3[/tex] vegetarian choices.
[tex]\text{Total choices with only one type of meat}: \(15 + 14 = 29\)[/tex]
[tex]\text{Total choices with only one type of meat or vegetarian}: \(29 + 3 = 32\)[/tex]
Andrew has [tex]32[/tex] choices to order from.
Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x).
What is the rate of change in Erinn's hourly wage per year?
Answer:
The rate of change in Erinn's hourly wage per year is [tex]1.25\$\ hour/year[/tex]
Step-by-step explanation:
we have that
x ----> the time in years that she worked at a company
y ----> represent the hourly wage
[tex]-5x+4y=32[/tex] ----> linear equation that represent the situation
Solve for y
[tex]4y=5x+32[/tex]
[tex]y=(5/4)x+32/4[/tex]
[tex]y=1.25x+8[/tex]
The slope m of the linear equation is
[tex]m=1.25\$\ hour/year[/tex]
The rate of change in Erinn's hourly wage per year is equal to the slope of the linear equation
so
The rate of change in Erinn's hourly wage per year is [tex]1.25\$\ hour/year[/tex]
Suppose f(x)=x^2.What is the graph of g(x)=f(5x)?
Answer:
D
Step-by-step explanation:
g(x)=f(5x)
this means plugging in 5x for x in f(x):
g(x)=f(5x)=(5x)^2
which can be further simplified:
5^2x^2=25x^2
Since the coefficient of x being larger means a vertical stretch, the answer is D
example:
g(2)=f(5*2)=f(10)=f(10^2)=100
so for g(x), it has the coordinates (2,100), which is most definitely not C
The graph of g(x) = f(5x) is a parabola that is narrower than the graph of f(x) by a factor of 1/5, with the vertex remaining the same.
Explanation:The graph of g(x) = f(5x) can be obtained by substituting 5x for x in the function f(x) = x^2. So, g(x) = f(5x) = (5x)^2 = 25x^2. This means that the graph of g(x) is a parabola that is narrower than the graph of f(x) by a factor of 1/5. The vertex of the parabola remains the same, but the x-values and the y-values are scaled.
(t9)-8 what is the simplify expression
[tex]\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ (t^9)^{-8}\implies t^{-8\cdot 9}\implies t^{-72}\implies \cfrac{1}{t^{72}}[/tex]
Which table of values could be generated by the equation 4y−2x=16
Answer:
x=0, y=4
x=2, y=5
x=4, y=6
x=6, y=7
x=8, y=8
x=10, y=9
For every x value goes up one, the y value goes up 2.
Step-by-step explanation:
Please mark brainliest and have a great day!
Answer:
x=0, y=4
x=2, y=5
x=4, y=6
Step-by-step explanation:
Find the sum of the sequence 45+46+47+48+.... +124
Answer:
[tex]\boxed{6760}[/tex]
Step-by-step explanation:
The formula for the first n terms of an arithmetic sequence is
Sₙ = n(a₁+ aₙ)/2
1. Find the number of terms
n = (124 - 45) + 1 = 79 + 1 = 80
2. Find the sum
a₁ = 45
a₈₀ = 124
[tex]S_{80} = 80 \left(\dfrac{45 + 124 }{2}\right) = 80 \times 84.5= \boxed{\mathbf{6760}}[/tex]
How do the two equations differ? y=(kx)^3 and y=kx^3
The parenthesis tell you which equation to do first.
P arenthesis
E xponents
M ultiplication
D ivision
A ddition
S ubtraction
Graph AABC with vertices AC-3, 4), B(-1,2), and C(-2,0) and its image after a 270° rotation about the origin.
Answer:
Here's what I get.
Step-by-step explanation:
The formula for rotation of a point (x,y) by an angle θ about the origin is
x' = xcosθ - ysinθ
y' = ycosθ + xsinθ
If θ = 270°, sinθ = -1 and cosθ = 0, and the formula becomes
x' = y
y' = -x
A: (-3,4) ⟶ (4,3)
B: (-1,2) ⟶ (2,1)
C: (-2,0) ⟶ (0,2)
The vertices of A'B'C' are (4,3), (2, 1), and (0, 2).
The Figure below shows the triangle before and after the rotation.
what is the simplified form of the following expression? assume x doesn’t = 0
For this case we must simplify the following expression:
[tex]\sqrt [5] {\frac {10x} {3x ^ 3}}[/tex]
We rewrite the expression as:
[tex]\sqrt [5] {\frac {10x} {x * 3x ^ 2}} =[/tex]
We eliminate common factors:
[tex]\sqrt [5] {\frac {10} {3x ^ 2}} =\\\frac {\sqrt [5] {10}} {\sqrt [5] {3x ^ 2}}[/tex]
We multiply the numerator and denominator:
[tex](\sqrt [5] {3x ^ 2}) ^ 4:\\\frac {\sqrt [5] {10}} {\sqrt [5] {3x ^ 2}} * \frac {(\sqrt [5] {3x ^ 2}) ^ 4} {(\sqrt [5] {3x ^ 2}) ^ 4} =[/tex]
\frac {\ sqrt [5] {10} * (\sqrt [5] {3x ^ 2}) ^ 4} {\sqrt [5] {3x ^ 2} * (\sqrt [5] {3x ^ 2} ) ^ 4} =
[tex]\frac {\sqrt [5] {10} * (\sqrt [5] {3x ^ 2}) ^ 4} {(\sqrt [5] {3x ^ 2}) ^ 5} =\\\frac {\sqrt [5] {10} * (\sqrt [5] {3x ^ 2}) ^ 4} {3x ^ 2} =[/tex]
[tex]\frac {\sqrt [5] {10} * \sqrt [5] {(3x ^ 2) ^ 4}} {3x ^ 2} =\\\frac {\sqrt [5] {10} * \sqrt [5] {81x ^ 8}} {3x ^ 2} =\\\frac {\sqrt [5] {10} * \sqrt [5] {81x ^ 5 * x ^ 3}} {3x ^ 2} =[/tex]
[tex]\frac {\sqrt [5] {10} * x \sqrt [5] {81x ^ 3}} {3x ^ 2} =\\\frac {x \sqrt [5] {810x ^ 3}} {3x ^ 2}[/tex]
Answer:
[tex]\frac {x \sqrt [5] {810x ^ 3}} {3x ^ 2}[/tex]
[tex]\frac {\sqrt [5] {810x ^ 3}} {3x}[/tex]
Answer:
The simplified form is [tex]\frac{\sqrt[5]{810 x^{3}}}{3x}[/tex]
Step-by-step explanation:
we need to simplify the value of x in given expression:
[tex]\sqrt[5]{\frac{10x}{3x^{3}}}[/tex]
Re- write the above as,
[tex]\sqrt[5]{\frac{10}{3x^{2}}}[/tex]
[tex]\frac{\sqrt[5]{{10}}}{\sqrt[5]{3x^{2}}}[/tex]
Multiply numerator and denominator by [tex](\sqrt[5]{3x^{2}})^{4}[/tex]
[tex]\frac{\sqrt[5]{{10}}}{\sqrt[5]{3x^{2}}} \times \frac{(\sqrt[5]{3x^{2}})^{4}}{(\sqrt[5]{3x^{2}})^{4}}[/tex]
[tex]\frac{\sqrt[5]{{10}}{\sqrt[5]{(3x^{2}}})^4}{{3x^{2}}}[/tex]
[tex]\frac{\sqrt[5]{{10}}{\sqrt[5]{81x^{8}}}}{{3x^{2}}}[/tex]
[tex]\frac{x \sqrt[5]{810 x^{3}}}{3x^{2}}[/tex]
[tex]\frac{\sqrt[5]{810 x^{3}}}{3x}[/tex]
Hence, the simplified form is
[tex]\frac{\sqrt[5]{810 x^{3}}}{3x}[/tex]
Which quantities is proportional to 26⁄13?
Quantities that are proportional to 26/13 are any other fractions that can reduce to positive 2.
26/13 = 26 ÷ 13 = 2
10/5 = 10 ÷ 5 = 2
200/100 = 200 ÷ 100 = 2
Answer:
So any fraction equal to 2 will work.
Step-by-step explanation:
Don't know which but I could tell you some that are equivalent to or proportional to 26/13.
26/13 reduces to 2 so 2 is a quantity that is proportional to 26/13
So any fraction equal to 2 will work.
What is y-5=3(x+1) in slope intercept form
Answer:
y=3x+8, :m=3, b=8
Hope this helps!
The line y - 5 = 3(x + 1) in the form of slope intercept is y = 3x + 8 and slope of the line is 3, y-intercept is 8.
What is a straight line?A straight line is a combination of endless points joined on both sides of the point.
The slope 'm' of any straight line is given by:
[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]
We have a line:
y - 5 = 3(x + 1)
In slope intercept form:
y = 3x + 3 + 5
y = 3x + 8
Thus, the line y - 5 = 3(x + 1) in the form of slope intercept is y = 3x + 8 and slope of the line is 3, y-intercept is 8.
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Which equation results from taking the square root of both sides of (x - 9)2 = 81?
Ох – 9 = +9
Ox+ 9 = +9
Ox+ 3 = +9
Ох – 3 = +9
Answer:
х – 9 = +9
Step-by-step explanation:
The equation results from taking the square root of both sides of
(x- 9)² = 81 is x -9 = ±9.
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
We have Equation,
(x- 9)² = 81
Now, simplifying for x we get
Take square root on both side
x-9 = √81
x -9 = ±9.
Then, the equation results from taking the square root of both sides is
x -9 = ±9.
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Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)
Answer:
Point-slope equations:
y - 5 = 4/3 (x - 6)
or
y - 1 = 4/3 (x - 3)
Step-by-step explanation:
Given two coordinate points (6, 5) and (3, 1)
Slope = (5 - 1)/(6 - 3) = 4/3
Point-slope equations:
y - 5 = 4/3 (x - 6)
or
y - 1 = 4/3 (x - 3)
Two point-slope equations for the line passing through the points
(6, 5) and (3, 1) are,
[tex]y-5=\frac{4}{3}(x-6)[/tex][tex]y-1=\frac{4}{3}(x-3)[/tex]Point-slope equationsPoint-slope exists in the general form y-y₁=m(x-x₁) for linear equations. It underlines the slope of the line and a point on the line (that exists not the y-intercept).The slope formula exists utilized to calculate the inclination or steepness of a line. It discovers application in choosing the slope of any line by finding the ratio of the change in the y-axis to the change in the x-axis. The slope of a line exists defined as the change in the "y" coordinate concerning the change in the "x" coordinate of that line.Here, the line passes through the points (6,5) and (3,1).
Let,
[tex]$$(6,5)=\left(x_{1}, y_{1}\right)$$[/tex]
[tex]$(3,1)=\left(x_{2}, y_{2}\right)$[/tex]
Substitute
Slope(m) = [tex]\frac{1-5}{3-6}=\frac{-4}{-3}[/tex]
Slope(m) =[tex]\frac{4}{3}[/tex]
Point-slope equations of the line passing through [tex]$(6,5 \6})$[/tex] and [tex](3}, 1)$[/tex]
Substitute[tex]$m=4 / 3$[/tex], and [tex]$(a, b)=(6,5)$[/tex]into [tex]$y-b=m(x-a)$[/tex]
[tex]y-5=\frac{4}{3}(x-6)[/tex] (point-slope equation)
Substitute[tex]$m=4 / 3$[/tex], and [tex]$(a, b)=(3,1)$[/tex] into [tex]$y-b=m(x-a)$[/tex]
[tex]$y-1=\frac{4}{3}(x-3)$[/tex] (point-slope equation)
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Write the function of the graph
Answer:
Option A: f(x) = 4 * 2^x
Step-by-step explanation:
4 because it is the y intercept.
2 because if you see point (1,8), yousee the 8 = 4 * a^1 where a = 2
If you need more explanation, please comment below.
Thank you!!
Answer:
A. [tex]f(x)=4\cdot (2)^x[/tex]
Step-by-step explanation:
We have been given graph of a function. We are asked to write the function formula from given graph.
We can see that our given function is an exponential function, so it will be in form [tex]y=a\cdot b^x[/tex], where,
a = Initial value or y-intercept,
b = Growth rate.
We can see that y-intercept is 4.
Now, we will solve for b using the point (1,8) as:
[tex]8=4\cdot b^1[/tex]
[tex]8=4\cdot b[/tex]
[tex]\frac{8}{4}=\frac{4\cdot b}{4}[/tex]
[tex]2=b[/tex]
Therefore, our required function would be [tex]f(x)=4\cdot (2)^x[/tex] and option A is the correct choice.
What is the equation of the line in point-slope form?
y+ 4 = 1/2(x+4)
y-4 = 1/2(x + 4)
y-0 = 2(x - 4)
y-4 = 2(8-0)
Answer: y=-2x+2/4
Step-by-step explanation:
Answer:
y + 4 =1/2 (x + 4)
Step-by-step explanation:
Your welcome uwu
3 pipes take 60 minutes to water the field. How much time will it take to water the field with 6 pipes? Is this direct proportion or inverse proportion and why? Full working out and equation please.
Answer:
30 minutes
Step-by-step explanation:
3 pipes takes 60 minutes, so one pipe must take 3*60 minutes as it would be 3 times slower. This equates to 180 minutes.
1 pipe takes 180 minutes so 6 pipes would take 1/6 of the time or 6 times faster.
The equation becomes 180/6
= 30 minutes.
Equation is; 3*60/6 = 30 minutes
This is inverse proportion.
The answer is 30 minutes
If it takes 3 pipes 60 minutes to water the field
The amount of time it will take one pipe can be calculated as follows
t= constant(k) × number of pipes
60= k/3
cross multiply
k = 60×3
= 180
Since it takes one pipe 180 minutes to water the field, then the amount of time it will take 6 pipes can be calculated as follows
= 180/6
= 30
Hence it will take 6 pipes 30 minutes to water the field
It is an inverse proportion because an increase in one quantity leads to a decrease in the other.
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A line intersects the point (6,9) and (7,4). What is the slope intercept equation for this line?
Answer:
y = -5x + 39
Step-by-step explanation:
Plug either ordered pair into the Point-Slope Formula FIRST, y - y₁ = m(x - x₁), then convert to Slope-Intercept Form by moving whichever term is nearest to y, over to the right side of the equivalence symbol to get the above answer.
What is the y-intercept of the function f(x)=2/9x+1/3
Answer:
1/3
Step-by-step explanation:
Slope intercept form: y=mx+b
m=rise/run (slope)
b= y-intercept
b=1/3
Factor p 2 + 18p + 32.
(p+ 4)(p + 8)
(P + 2)p+ 16)
(P + 16)2
Answer:
(P + 2)(p+ 16)
Step-by-step explanation:
Factor p 2 + 18p + 32.
Consider the form x² +bx +c. Find a pair of integers whose product is c and whose sum is b .
In this case, whose product is 32 and whose sum is 18 .
2,16 .
Write the factored form using these integers.
(P + 2)(p+ 16)
CHECK
(P + 2)(p+ 16)
distribute
p(p+16) + 2(p+16)
simplify
p² + 16p + 2p + 32
combine 16p + 2p = 18p
p² + 18p + 32
Please mark as brainliest
Answer:
(p + 2)(p + 16)
That's your answer!!
You just finished paving a rectangular driveway measuring 75 feet by 20 feet. You charged the customer $1,000. After deducting the expenses shown below, how much profit did your company make on this job?
Answer:
The missing information is attached in the picture below.
The company made $292.5 dollars in profit.
Step-by-step explanation:
Using the information provided by the table, we can calculate how much money was spent
1. gravel
12 and a half cubic yards * $15 = $187.5
2. tar/sealant
$0.15 per square foot * (75*20 ft^2) = $225
3. labor
$10 per hour * 25 hours = $250
4. insurance
fixed $45
We add all the expenses together
$(187.5 + 225 + 250 + 45) = $707.5
The profit will be equal to
$1000 - $707.5 = $292.5
Step-by-step explanation:
Please someone help me thank you
Answer:
D. 9/4 ÷ 3/4
Step-by-step explanation:
In the question, the number line represents 9/4 divided into 3 equal units.
The size of each unit is 3/4 as shown.
Showing that 3/4 divides 9/4 into 3 divisions:
9/4 ÷ 3/4
= 9/4 x 4/3
= 9/3 x 4/4
= 9/3 x 1
= 3 x 1
= 3
Hence, the number line represents three divisions given by 9/4 ÷ 3/4.
Please answer the question I need help
Answer:
x + 3x + 5 = 101
Step-by-step explanation:
Consider your problem and think of an equation of each person. We know that Aylen has a certain amount of money, which will be x. Rich though has 5 more than 3 times Aylen.
Aylen: x amount of money
Rich: 5 more than 3 times the amount of money of Aylen.
5 more indicates addition, 3 times indicates multiplication
So then:
Rich: 5 + 3x (where x is the amount of money of Aylen)
Now both of them have $101 together, in other words, if you add up their money they would have $101. So we add their equations:
x + 5 + 3x = 101
Because the operation is addition, we can switch their places and the result will not change so the answer would be:
x + 3x + 5 = 101
The graphic models one of the properties used to solved a one variable equation 8(3x+40)=10. Which property is being modeled
A. Addition property of equality
B. Commutative property of multiplication
C. Distributive property of multiplication
D. Associative property of addition
Answer:
the answer is C. Hope this helps
Answer:
C. Distributive property of multiplicationStep-by-step explanation:
I got 100%Compare the rates of change of the following items.
A.
The rate of change of item I is greater than the rate of change of item II.
B.
The rate of change of item II is greater than the rate of change of item I.
C.
The rate of change of item I is equal to the rate of change of item II.
Answer:
It was A.
Step-by-step explanation:
the rate of change of item I is greater than the rate of change of item II.
I just had it and answer B. was wrong
The rate of change of item I is greater than the rate of change of item II. (Option A)
How to find the rate of change of a linear equation?Suppose that the considered linear equation is of the form [tex]y = mx + c[/tex]
Then, when we change x by 1 unit, then:
[tex]y + \delta y = m(x + 1) + c\\mx + c + \delta y = mx + c + m\\\delta y = m[/tex]
where [tex]\delta y[/tex] shows the change in y as x changes by 1 unit.
We found that this change is the value of 'm'.
It is called slope of the line this equation represents (each linear equation represents a line).
Finding rate of each item:
Case 1: y = 3x - 11The rate is 3 units increment in y per unit increment in x. In short, the rate is 3 unit / unit increment in x
Case 2:Since graph of a straight line is given, we can find its slope which would represent its rate.
Consider x = 0, for which y = 0 is given in graph.
Now change x by 1 unit, so x becomes x = 1
At x =1 , y = 2
So we see that as x changes by 1 unit, y goes from 0 to 2 (change of 2 units).
Hence, the rate is 2 units increment in y per unit increment in x. In short, the rate is 2 unit / unit increment in x
Thus, the rate of change of item I is greater than the rate of change of item II. (Option A)
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Which of the graphs above is the graph of the equation below?
y = 13 – 632 + 111 - 6 = (1 - 3)(1 – 2)(1 - 1)
Shown below
Step-by-step explanation:To solve this problem, we need to analyze the leading coefficient and the roots of the polynomial function:
[tex]f(x)=x^3-6x^2+11x-6[/tex]
Recall that a polynomial function can be represented by:
[tex]f(x)=a_{n}(x)+ \ldots +a_{1}x+a_{0}[/tex]
So the leading coefficient is [tex]a_{n}[/tex]. In our problem, this coefficient is [tex]a_{n}=1[/tex]
Since [tex]n[/tex] is odd and the leading coefficient [tex]a_{n}>0[/tex], then the graph must falls to the left and rise to the right. Also, the roots are [tex]x_{1}=1 \ x_{2}=2 \ and \ x_{3}=3[/tex]. So the only graph that matches this is the fourth one as indicated below.
Answer:
w
Step-by-step explanation:
for Plato
What is the distance between the points (–4, 2) and (3, –5)?
Answer:
[tex]\sqrt{98}[/tex]
Step-by-step explanation:
Using the distance formula
with (x₁, y₁ ) = (- 4, 2) and (x₂, y₂ ) = (3, - 5)
d = [tex]\sqrt{(3+4)^2+(-5-2)^2}[/tex]
= [tex]\sqrt{7^2+(-7)^2}[/tex]
= [tex]\sqrt{49+49}[/tex]
= [tex]\sqrt{98}[/tex]
C= [tex]\sqrt{98}[/tex]
What happens when you square a square root?We could say that the square root or the square cancel each other out. They are a inverse of each other. If we have the number written with the index two ( squared) then taking the square root simply means that we leave out the two ( this only applies on the positive numbers ).
How to figure out square roots?Start by i = 1, if i * i = n, then i it is the square root of n as n is the perfect square.if i * i > n, it means square root must lie between (i-1, i), let’s call them (low, high)Apply binary search in the range (low, or high). Find mid of (low, high):Using the distance formula
with (x₁, y₁ ) = (- 4, 2) and (x₂, y₂ ) = (3, - 5)
[tex]d= \sqrt{(3+4)^{2} +(-5-2)^{2}} \\\\= \sqrt{7^{2} + (-7)^{2}} \\\\= \sqrt{49+49} \\\\=\sqrt{98}[/tex]
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Write “12 more than r” as an expression
Answer:
12 + r or r + 12
Step-by-step explanation:
Either way can be written as the expression 12 is more than r or x
Answer:
f(r) = r + 12
Step-by-step explanation:
An expression is an equation that usually involves x and y. When we are dealing with a unknown number we use a variable. some common variable is x and y, in this instance we will use r. Therefore we have to have r in our expression. however, we need a output therefore we use function of r. (f(r))
p.s. F(r) usually represents y.
futhermore, if you see more than you know you will use addition.
hope this helps!
Which of the following is the graph of y = 3x2 + 6?
Answer:
what are the graphs?
Step-by-step explanation:
Answer:
(0,6)
Step-by-step explanation:
What is the solution for the inequality -4(x+3)<-2-2x?
Hello!
Answer:
[tex]\boxed{X>-5}\checkmark[/tex]
The answer should have negative sign.
Step-by-step explanation:
Distributive property: a(b+c)=ab+ac
First, expand.
-4(x+3)=-4x-12
-4x-12<-2-2x
Then add by 12 both sides of an equation.
-4x-12+12<-2-2x+12
Simplify.
-4x<-2x+10
You add by 2x both sides of an equation.
-4x+2x<-2x+10+2x
Simplify.
-2x<10
Multiply by -1 both sides of an equation with reverse inequality.
(-2x)(-1)>10(-1)
Simplify.
2x>-10
Then you divide by 2 both sides of an equation.
2x/2>-10/2
Finally, simplify and solve to find this answer.
-10/2=-5
[tex]\boxed{x>-5}[/tex], which is our correct answer.
Hope this helps you!
Have a nice day! :)
Thank you!
-Charlie
Rory records the percentage of battery life remaining on his phone throughout a day. The graph represents the percentage of battery life remaining after a certain number of hours.
Rory’s battery was full at 6:00 a.m, or t = 0. Which times could Rory's phone have been plugged into the charger? Select three options.
12:00 p.m.
3:00 p.m.
5:00 p.m.
8:00 p.m.
11:00 p.m.
Emily went to a local shop to purchase some round rugs. Each rug has a radius of 3 feet. She is
trying to cover as much of the floor of her 18 foot by 20 foot living room as possible without
any overlap of the rugs. How much of the bare floor will be visible around the rugs?
A. 20.76 square feet
B. 254.47 square feet
C. 9 square feet
D. 105.5 square feet
Answer:
D. 105.5 square feet
Step-by-step explanation:
Given:
The rug has a radius of 3 feet.
The floor dimensions are 18 feet by 20 feet.
Now we have to find the area of the rug using area of the circle formula and also we need to find the area of the floor which is in rectangle shape.
Area of a circle = [tex]\pi r^2[/tex]
r = 3 feet and the value of [tex]\pi = 3.14[/tex]
Now plug in the given values in the above formula, we get
Area of a rug = 3.14*3*3
Area of a each rug is 28.27 square feet.
Now let's find the area of the floor.
Area of the floor = length * width
Here length = 18 feet and width = 20
The area of the floor = 18*20
= 360 square feet
Now we have to find how many rugs needed to cover the floor without overlap.
Here the radius of the rug = 3 feet
The diameter of the rug = 2*radius = 2*3 = 6 feet
So one rug covers 6 feet by length and width.
Therefore, 18/6 = 3
The width is 20 feet
20/6 = 3, we have to take the whole number part only.
So Emily needs only 3*3 = 9 rugs.
The area of the 9 rugs = 9*28.27 = 254.43
To find the bare floor will be visible around the rugs, we need to subtract the area of the 9 rugs from the floor area
Bare floor = 360 - 254.43
Bare floor = 105.5 square feet.