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Georgia [21]
3 years ago
12

Can someone please help ​

Mathematics
2 answers:
Degger [83]3 years ago
7 0

Answer:

216 cm^{3}

Step-by-step explanation:

From what I could tell, the model is a cube with a side length of 6. That means all sides have a length of 6 cm. You just have to do 6*6*6= 216 cm^{3}

Hope this helps!! I'm not sure why there is a 42 at the bottom though.

dmitriy555 [2]3 years ago
5 0

It looks like the 42 refers to the area of the base. If so, then we multiply that with the height 6 to get 42*6 = 252

So the volume of this rectangular prism is 252 cubic cm.

It seems strange that your teacher wrote "volume (in cm)" instead of "volume (in cm^3)" or "volume (in cubic cm)". Saying just "cm" without the "cubic" part is incorrect as centimeters alone are a linear unit, not volumetric.

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An 8.0 kg block is moving at 3.2 m/s. A net force of 10 N is constantly applied on the block in the direction of its movement, u
Softa [21]

Answer:

5.02 m/s

Step-by-step explanation:

We are given that

Mass of block,m=8 kg

Initial velocity,u=3.2 m/s

Net force ,F=10 N

Distance,s=6 m

We have to find the approximate final velocity of the block.

We know that a=\frac{F}{m}

Using the formula

a=\frac{10}{8}=\frac{5}{4} m/s^2

We know that

v=\sqrt{u^2+2as}

Using the formula

v=\sqrt{(3.2)^2+2\times \frac{5}{4}\times 6}

v=5.02 m/s

8 0
3 years ago
Find the exact value of tan 15 degrees
pentagon [3]
<span>tan(15) = 
sin(15) / cos(15) = 
sin(45 - 30) / cos(45 - 30) = 
[ sin(45)cos(30) - sin(30)cos(45) ] / [ cos(45)cos(30) + sin(45)sin(30)] 

Since sin(45) = cos(45) = √2/2, you can just factor that out from the top and bottom 
[ cos(30) - sin(30) ] / [ cos(30) + sin(30)] 
[ √3/2 - 1/2 ] / [ √3/2 + 1/2] 
(√3 - 1) / (√3 + 1) 
(√3 - 1)^2 / (√3+1)(√3 - 1) 
(√3 - 1)^2 / (3 - 1) 
(3 - 2√3 +1) / 2 
2 - √3 

There's also a formula for tan(a-b), but I couldn't remember it off hand.</span>
4 0
3 years ago
Why would "-7" in the expression (x^2+3)-(x-7) become positive?
ryzh [129]
You would use the distributive property with the negative. So the second x becomes negative, but since the 7 is already negative it becomes positive. Think of it as if you put the two dashes together you can make a plus sign.
5 0
3 years ago
Read 2 more answers
Triangle XYZ is obtuse which list could represent the angle measures of triangle XYZ?
asambeis [7]
An obtuse triangle must have an angle greater than 90degrees (cannot equal 90). Therefore, A. would be the correct answer. This is because A. is the only set of angles that includes an angle greater than 90. Also, all angle measures add up to equal 180degrees.
5 0
3 years ago
Name the property of real numbers illustrated by the equation -3(x + 4) = -3x -12
vivado [14]

Answer:

Distributive Property

Step-by-step explanation:

They distributed the -3 to x and 4. In this case, to distribute the -3, you multiply it to each term.

-3 × x = -3x.

-3 × 4 = -12.

-3x - 12

5 0
3 years ago
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