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Anettt [7]
2 years ago
4

Martina is going to wallpaper her wall in her bedroom.The wall is 11 feet 4 inches wide and 8 feet 3 inches high. A roll of of w

allpaper is 21 inches wide and 30 inches long. Whole strips of wallpaper are cut from the roll, then glued vertically onto the wall. How many whole strips of wallpaper can Martina cut from one roll of paper?
Mathematics
1 answer:
DedPeter [7]2 years ago
7 0
Convert all into inches: 1 ft= 12 inc
= 11ft = 132in. Add 4 in.
132+4 = 136 inches
8 ft = 96 in. Add 3 in.
96 + 3 = 99 inches

Area of the wall is l*w = 99* 136 = 13,464 in^2
Area of one strip = 30*21 = 630 in^2

630 in = 1 strip
13464 in = X
630*X = 13464
X= 13464/630
X= 21.37

They need whole. So, Rounding it will give it 21 strips.
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Line segments XY and ZY are tangent to circle O. Circle O is shown. Triangle X Y Z has points X and Z on the circle. Lines X Y a
pickupchik [31]

Answer:

The correct option is;

An isosceles triangle

Step-by-step explanation:

The parameters given are;

Line segments XY and ZY are tangents to circle O.

ΔXYZ has points X and Z on the circle.

XY and ZY are tangents that intersect at point Y outside the circle'

Therefore, given the circle has center O, then;

OY ≅ OZ = Radius of circle with center O

∠OXY ≅ ∠OZY = 90°  (The radius line from the circle center to the tangent point is perpendicular)

OY ≅ OY (Reflexive property)

ΔOYX and ΔOYZ are right triangles (Triangle with one angle = 90°

ΔOYX ≅ ΔOYZ (Hypotenuse Leg, HL, rule of congruency)

Therefore;

XY = ZY (Corresponding Parts of Congruent Triangles are Congruent CPCTC)

Triangle XYZ is an isosceles triangle (Triangle with two equal sides).

4 0
2 years ago
An oblong box has a volume equal to lwh, where l is the length, w is the width, and h is the height. If the volume is 24 cubic f
rjkz [21]
<span>An oblong box has a volume equal to lwh, where l is the length, w is the width, and h is the height. If the volume is 24 cubic feet, solve for the height in terms of the other sides.

Given:
volume of 24 cubic feet

Required:
height

Solution:
V = 24 cubic feet
assume that the length, weight and height of the box are all equal
so l = w = h

24 = l^3
l = 2.88 feet</span>
3 0
2 years ago
Read 2 more answers
A new model of a cell phone was released while the original model was still being sold. The average number of the original model
Rufina [12.5K]

Answer:

2750 x (1 - 0.21)ˣ

Step-by-step explanation:

Original: 2750

1st week after: 2750 x (1 - 0.21)

2nd weeks after: 2750 x (1 - 0.21) x (1 - 0.21) = 2750 x (1 - 0.21)²

x weeks after:  2750 x (1 - 0.21)ˣ

8 0
2 years ago
Which parent function is represented by the graph?
ikadub [295]

The parent function represented by the graph is an exponential function, as it gets exponentially smaller.

8 0
2 years ago
Read 2 more answers
Emily is a songwriter who collects royalties on her songs whenever they are played in a commercial or a movie. Emily will earn $
Hitman42 [59]

Answer:

(6,2)

Step-by-step explanation:

Variable Definitions:

​x= the number of commercials

y= the number of movies

Each commercial earns Emily $50, so x commercials would earn her 50x dollars in royalties. Each movie earns Emily $150, so y movies would earn her 150y dollars in royalties. Therefore, the total royalties 50x+150y equals $600:

50x+150y=600

Since Emily's songs were played on 3 times as many commercials as movies, if we multiply 3 by the number of movies, we will get the number of commercials, meaning x equals 3y.

x=3y

Write System of Equations:

​50x+150y=600

x=3y

Solve for y in each equation:

1)  50x+150y=600

   150y=−50x+600

   y=-1/3x+4

2)  x=3y

    y=1/3x

The x variable represents the number of commercials and the yy variable represents the number of movies. Since the lines intersect at the point (6,2) we can say:

Emily's songs were played on 6 commercials and 2 movies.

​

 

4 0
2 years ago
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