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lina2011 [118]
3 years ago
15

Bobby is making model train cars from wood. He needs 3/4 inches of wood for each train car. If Bobby has a piece of wood that is

8 1/4 inches long, how many pieces can he cut to make train cars?
Mathematics
1 answer:
dedylja [7]3 years ago
3 0

Answer:

11

Step-by-step explanation:

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A tree is 58 inches tall. how tall is it in feet and inches
mart [117]
A foot is 12 inches.
12 can go into 58 evenly 4 times, since 12• 4 equals 48 but 12 • 5 equals 60. This means that the tree is at least 4 feet. Then to find the leftover inches we do 58-48 equals 10, therefore the answer is 58 inches translates to 4 feet and 10 inches.
8 0
3 years ago
A box with a square base and open top must have a volume of 32,000 cm3. find the dimensions of the box that mini- mize the amoun
zmey [24]
Alrighty


squaer base so length=width, nice


v=lwh
but in this case, l=w, so replace l with w
V=w²h

and volume is 32000
32000=w²h


the amount of materials is the surface area
note that there is no top
so
SA=LW+2H(L+W)
L=W so
SA=W²+2H(2W)
SA=W²+4HW

alrighty

we gots
SA=W²+4HW and
32000=W²H

we want to minimize the square foottage
get rid of one of the variables
32000=W²H
solve for H
32000/W²=H
subsitute

SA=W²+4WH
SA=W²+4W(32000/W²)
SA=W²+128000/W

take derivitive to find the minimum
dSA/dW=2W-128000/W²
where does it equal 0?

0=2W-1280000/W²
128000/W²=2W
128000=2W³
64000=W³
40=W

so sub back
32000/W²=H
32000/(40)²=H
32000/(1600)=H
20=H

the box is 20cm height and the width and length are 40cm
7 0
3 years ago
What else would need to be congruent to show that ABC =XYZ by SAS?<br> Given:<br> AB=XY<br> A=X
Sati [7]

ABC = XYZ  by  SAS

AB = XY    -     Side

A = X         -    Angle

So you want to find another congruent <em>side</em>.

Removing the taken possible side, two sides can be congruent.

Either :

BC = YZ

<em>OR</em>

AC = XZ

5 0
3 years ago
Read 2 more answers
Please help me please will give brainliest to anyone who is good <br><br>show your work ​
AfilCa [17]

Answer:

B

45 loaves x 5 cups/loaf = 225 cups

225 cups ÷ 4 cups/pound = 56.25 pounds

8 0
3 years ago
Write a real world problem that involves classifying a quadrilateral then solve the problem.
Anastasy [175]

An amusement park ride has a moving platform attached to four swinging arms. The platform swings back and forth, higher and higher, until it goes over the top and around in a circular motion. In the diagram below, AD and BC represent two of the swinging arms, and DC <span>is parallel to the ground
</span>(line l). Explain why the moving platform AB <span>is always parallel to the ground.</span>

5 0
3 years ago
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