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uysha [10]
3 years ago
5

What is the surface area of the cube shown? 6.5cm 6.5cm

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

SA = 253.5 cm

Step-by-step explanation:

SA = 6a^2

SA = 6(6.5)^2

SA = 6(42.25)

SA = 253.50 cm

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A rectangle is 6yards longer than it is wide. Find the dimensions of the rectangle if it’s area is 187 square yards
emmasim [6.3K]

Answer:

Width = 11 yards

Length = 17 yards

Step-by-step explanation:

First of all, the length of the rectangle is 6 yards longer than the width, this means, length = width + 6 yards. This dimensions can be represented on figure 1, where <em>w</em> is width, and <em>l</em>, for length.

We know the area of a rectangle is A = width x length

For our case 187 = w . (w + 6)

Using the Distributive Property for the multiplication we obtain

187 = w^{2} +6w

w^{2} +6w-187 =0,

Using the quadratic formula w=\frac{-b\±\sqrt{b^{2}-4ac } }{2a} where a = 1, b = 6, c = - 187 and replacing into the formula, we will have:

w=\frac{-6\±\sqrt{6^2-4(1)(-187)} }{2(1)}

w=\frac{-6\±\sqrt{36+748} }{2}=\frac{-6\±\sqrt{784} }{2}=\frac{-6\±28}{2}

We have two options: w=\frac{-6+28}{2}=\frac{22}{2}=11  yards

Or

w=\frac{-6-28}{2}=\frac{-34}{2}=-17 yards But a distance (width) can not be negative so, this answer for w must be discarded.

The answer must be width = 11 yards.

To find the length l =\frac{187}{11}=17 yards

6 0
3 years ago
Please help ASAP!!!!!!
lina2011 [118]

Answer:

I think its C but I'm not too sure.

4 0
3 years ago
The perimeter of a triangle is 28 ft. The medium side is 4 ft longer than the shortest side,while the longest side is twice as l
Aliun [14]
Hope this helps you!

6 0
3 years ago
) Today there is a discount of $10 off a purchase of 5 or more concert tickets.
antiseptic1488 [7]

Answer:

Tickets * cost - 10

Step-by-step explanation:

5*cost-10

5 0
3 years ago
Given that f(1)=2 and f'(1)=4, find the derivative of f(x)loge(x) when x=1
inessss [21]

Answer:

2

Step-by-step explanation:

loge(x) is ln(x)

f(x) × ln(x)

Differentiate using product law

[ln(x) × f'(x)] + [(1/x) × f(x)]

x = 1

[ln(1) × f'(1)] + [(1/1) × f(1)]

(0 × 4) + (1 × 2)

0 + 2

2

3 0
3 years ago
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