Answer:
SA = 16x^2 +30x+6
Step-by-step explanation:
The surface area is given by
SA = 2 (lw + lh + wh)
The length is 2x, the width is (x+3) and the height is (2x+1)
SA = 2 ((2x)*(x+3) + (2x)*(2x+1) + (x+3) (2x+1))
We need to distribute
SA = 2 ((2x^2+6x) + (4x^2+2x) + (2x^2 +6x+x+3))
Combine like terms
SA = 2 (2x^2+ 4x^2+2x^2+6x+2x +6x+x+3)
SA = 2 (8x^2+15x+3)
Multiply by 2
SA = 16x^2 +30x+6
Answer:
No
Step-by-step explanation:
I would not agree with Jayna because using the distributive property, you can get:
4(a + 2) = 4(a) + 4(2) = 4a + 8
Jayna did not get the right answer because she did not distribute the 4 to the 2 in a + 2 and she only multiplied a by 4.
2/3j-2/9
=2/3j-2/3*1/3
=2/3(j-1/3)
Answer:
<h2><em><u>
3. V = 1,498.2</u></em></h2><h2 /><h2><em><u>
4. V = 2,813.44</u></em></h2><h2 /><h2><em><u>
5. V = 96.293</u></em></h2>
Step-by-step explanation:
3. Formula of a Cylinder + Formula of a Cone = Total
V=πr^2h + V=πr^2h
/3 = total
V = 3.14 * 36 * 10 + V = 3.14 * 36 * 10/3
V = 1,130.4 + V = 376.8 = Total
<h2><em><u>
V = 1,498.2</u></em></h2>
4. Formula of Cone + Formula of Cone = Total
V=πr^2h
/3 + V=πr^2h
/3 = Total
V = 3.14 * 36 * 8/3 + V = 3.14 * 100 * 8 = Total
V = 301.44 + 2,512 = Total
<h2><em><u>
V = 2,813.44</u></em></h2>
5. Formula of a cylinder + formula of a sphere = Total
V=πr^2h + V=4
/3πr^3 = Total
V = 3.14 * 4 * 5 + V = 4/3 * 3.14 * 8
V = 62.8 + V = 33.493 = Total
<h2><em><u>
V = 96.293</u></em></h2>
DEFINITELY hope this helped,
Kavitha
Let the side of one square be x. Area = x*x = x²
Then the side of other square would be 2x , Area = 2x*2x = 4x²
Combined area = x² + 4x² = 5x²
This combined area = 45 cm²
Therefore 5x² = 45 Divide both sides by 5
x² = 45/5
x² = 9 Take square root of both sides
x = √9
x = 3
Length of larger square is 2x = 2*3 = 6 cm
Length of larger square = 6cm
