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yKpoI14uk [10]
3 years ago
14

What equation can be used?

Mathematics
1 answer:
Kryger [21]3 years ago
5 0

Answer:

f(x)=89x+1800

Step-by-step explanation:

$1800 is spent on a washing machine. This number never changes, so we just need to add that to our annual total

$89 is spent every year. This means that this number needs to be with our variable, x, as it is dependent on the number of years that occur. When we put these two things together, we get the following equation:

f(x)=89x+1800

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The surface area of a right square pyramid is given by A=b2+2bh where b is the length of a side of the base and h is the slant h
gizmo_the_mogwai [7]

Answer:

h = \dfrac{A - 9}{6}

Step-by-step explanation:

A=b^2+2bh

b = 3

A = 3^2 + 2(3)h

A = 9 + 6h

6h = A - 9

h = \dfrac{A - 9}{6}

4 0
3 years ago
Match The Following, 26 POINTS HELP FAST
zavuch27 [327]

The formula for the volume of a cone is:

1/3\pi r^{2} h

The formula for the volume of a cylinder is:

\pi r^2h

The formula for the volume of a triangular prism is:

bh

The formula for the volume of a pyramid is:

1/3bh

The formula for the volume of a rectangular prism is:

lwh

6 0
3 years ago
Read 2 more answers
small cubes with edge lengths of 1/4 inch will be packed into the right rectangular prism shown.( the base is 4 1/2, the width i
ss7ja [257]

General Idea:

We need to find the volume of the small cube given the side length of the small cube as 1/4 inch.

Also we need to find the volume of the right rectangular prism with the given dimension (the height is 4 1/2, the width is 5, and the length is 3 3/4).

To find the number of small cubes that are needed to completely fill the right rectangular prism, we need to divide volume of right rectangular prism by volume of each small cube.

Formula Used:

Volume \; of \; Cube = a^3 \; \\\{where \; a \; is \; side \; length \; of \; cube\}\\\\Volume \; of  \; Right \; Rectangular  \; Prism=L \times W \times H\\\{Where  \; L \; is \; Length, \; W \; is \; Width, \;and  \; H \; is \; Height\}

Applying the concept:

Volume of Small Cube:

V_{cube}= (\frac{1}{4}  )^3= \frac{1}{64} \; in^3\\\\V_{Prism}=  3 \frac{3}{4}  \times 5 \times  4 \frac{1}{2}  = \frac{15}{4}  \times \frac{5}{1}  \times \frac{9}{2}  = \frac{675}{8}  \\\\Number \; of \; small \; cubes= \frac{V_{Prism}}{V_{Cube}}   = \frac{675}{8}  \div \frac{1}{64}  \\\\Flip \; the \; second \; fraction\; and \; multiply \; with \; the \; first \; fraction\\\\Number \; of \; small \; cubes \;= \frac{675}{8} \times \frac{64}{1}   = 5400

Conclusion:

The number of small cubes with side length as 1/4 inches that are needed to completely fill the right rectangular prism whose height is 4 1/2 inches, width is 5 inches, and length is 3 3/4 inches is <em><u>5400 </u></em>

4 0
3 years ago
Read 2 more answers
Zoe made a scale drawing of a house and its lot. She used a scale of 1 inch : 3 feet. In real life, the backyard is 45 feet wide
stellarik [79]
I believe the answer is 15 inches

45/3=15
7 0
3 years ago
Read 2 more answers
Please find the m∠DEY
GrogVix [38]

Answer:

41, x=-5

Step-by-step explanation:

m<DEY = m<FEY, by angle bisector theorem

(9x-4) = 41

9x = 45

x = 5

m<DEY = 41

6 0
3 years ago
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