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Anni [7]
3 years ago
5

Christopher is going to install wallpaper on the four walls of his room. Two of the walls are 14 feet long by 9 feet high. The o

ther two walls are 20 feet long by 9 feet high. His options at the wallpaper store are below.
One single roll of wallpaper costs $20 and covers 18 square feet of area.

One double roll of wallpaper costs $40 and covers 54 square feet of area.

What is the minimum cost of installing the wallpaper on the four walls of Christopher's room?
Mathematics
1 answer:
ELEN [110]3 years ago
5 0
Dear Oliwia123grych, let's go step by step. The walls are 14 ft x 9 ft, so if  we multiplied 14 by 9, we get the area 126 ft². The other walls are 20 x 9 ft, so if we multiplied 20 by 9, we get the area 180 ft². Add the area together to get 306 ft² total. To make the process simpler, let's find the unit rate for each square feet of area for each type of wallpaper. The first one is $1.11. The other one is $0.70. Since the second unit rate is smaller. Let's divide first, then multiply. 180/54 gets us 3.33 double rolls of wall paper. Then we do 3.33 times 40 to get $133.20 minimum. (Please rate this brainiest. I worked really hard on this problem.)
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The measurement of Angle N is 64°. Which angle measurement is complementary to Angle N?
Verizon [17]

Answer:

116°

Step-by-step explanation:

complementary angles add to 180 so

180-64= 116

5 0
3 years ago
You earn a base fee plus an hourly rate for running errands.You earn 20$ when it takes 1 hour to run the errands. You earn $35 w
beks73 [17]

Answer:

<em>The base fee is 5</em>

Step-by-step explanation:

<u>Linear Function</u>

The linear function is widely used to model real situations in life where the dependancy of one variable are linear by nature.

The problem gives us three conditions, more than enough to find a linear model for the earnings for running errands. Let's make x the number of hours it takes to run the errands, and y the earnings. The linear model has the general equation

y=mx+b

We have these points (1,20) (2,35) (3,50) and need to find the base fee, which is the value of b or the independant term of the equation.

We'll use the first two points to find the equation and the third point to verify it. Using (1,20)

20=1\cdot m+b

m+b=20

Now we use (2,35)

35=m\cdot 2+b

2m+b=35

Subtracting both equations

m=15

Replacing into the first equation

b=5

The equation is

y=15x+5

Let's test the formula by replacing the point x=3

y=15\cdot 3+5=50

The model is accurate and the base fee is 5

6 0
4 years ago
One math problem. Having trouble, could somebody help
Cloud [144]
Correct option - A

It cannot be determined at all.This is because for ages 10,8 and 14 the shoe sizes are same that is 9
We can't get any function as for some x's there is only one 'y'

Hope This Helps You!
7 0
4 years ago
Complete the description of how you use the order of operations to simplify expressions with exponents.
swat32

Find the value of any expressions (within) parentheses first. Then evaluate all powers. Then multiply or (divide) from left to right, and finally add or (subtract) from left to right.

4 0
3 years ago
Please help!!!
labwork [276]
Y=5x+7 is the answer i think
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3 years ago
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