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Anestetic [448]
3 years ago
8

a stack of bricks is 3 1/2 feet high. if each brick is 1 3/4 inches high, how many bricks are in the stack?

Mathematics
1 answer:
Pepsi [2]3 years ago
6 0
The number of bricks= Total height of stack/ height of a single brick.
No. of bricks=3 1/2 ÷ 1 3/4
Convert the fractions into improper fractions;
No. of bricks= 7/2÷7/4
No. of bricks= \frac{14}{4} * \frac{4}{7}
No. of bricks= 2
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Please help ASAP I don’t get this
irina1246 [14]

Answer:

Okay so 5th power of 2 Plus second power of 2 minus 3rd power of 3

8 0
2 years ago
Help me with this thanks​
fredd [130]

Answer:

Volume of composite is 483  mm^3

Step-by-step explanation:

We need to add the volume of a rectangular prism (7 mm x 12 mm x 3 mm) to a semi-cylinder (of radius 3.5 mm and height 12 mm):

Volume of the prism = 7 x 12 x 3 mm^3  = 252 mm^3

Volume of the semi-cylinder =  \frac{\pi\,\,R^2\,\,H}{2}  =  \frac{\pi\,\,(3.5)^2\,\,(12)}{2} =230.907 \,\,mm^3

Therefore the sum of both volumes gives:

(252 + 230.907) mm^3 = 482.907  mm^3

WHich can be rounded to the nearest whole number as: 483 mm^3

4 0
3 years ago
I need help I don’t know how to do this
IgorLugansk [536]

Answer:

PL and LM

Step-by-step explanation:

The definition of perpendicular is two lines that create a 90 degree angle. There are a lot of those in a rectangular prism. One of them is PL and LM, because they intersect to create a right angle.

7 0
1 year ago
One cold night the temperature was 0 degrees at 8 p.m. The temperature dropped at a constant rate from 8 p.m. to midnight. At mi
Elena L [17]

-16.8 = m(4)

-16.8 / 4 = -4.2

So the constant rate is -4.2.

Hope this Helps!!

4 0
3 years ago
3x+y=5 , 2x-2y=22 solve the system of equations by the addition method
IgorLugansk [536]

<span><em />
3x+y=5</span>

<span /><span>2x-2y=22 ...............2(x-y)=22 ⇒ x-y=11</span><span><em /></span>

<span><em>3x+y=5</em></span>

<span /><span><em><u>x-y=11                   </u> </em>(+)</span>

<span />3x+x+y-y=11+5

<span>4x=16  /:4</span>

<span /><em>x=4</em>

x-y=11

4-y=11

-y=7 /*(-1)

<em>y=-7</em>


<span><em></em></span>

5 0
3 years ago
Read 2 more answers
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