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2 years ago

10

Peter received a trophy at the state math competition. His trophy is in the shape of a square pyramid and is covered in wrapping

paper. What is the minmum amount of wrapping paper needed to wrap his trophy?

1 answer:

lakkis [162]2 years ago

6 0

Answer:315 cm

Step-by-step explanation:

7x7

7x9.5

7x9.5

7x9.5

7x9.5

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Answer:

y= 18

Step-by-step explanation:

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Which pair of ratios form a proportion?

boyakko [2]

5:8 and 20:32 would be a proportion.

Easy way to find this:
Set up the proportion as a fraction.
Use the cross product property. Multiply the diagonals and if the products of the diagonals are the same, then they are proportional.

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1.Find the dot product of the two given vectors, u=(1,6) and v=(-5,-2) 2. Find the dot product of v=-7i+4j and w=-6i+5j

Svet_ta [14]

The dot product of the two vectors will be given as follows:
v*w=(-7i+4j)*(-6i+5j)
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Hence the answer is:
v*w=(-42i+20j)

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3 years ago

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The hypotenuse of a right triangle is 1m longer than twice one of the other two sides. The third side of the triangle is 15m. Fi

Dimas [21]

Let the length of unknown side be x

So, hypotenuse = 2x + 1

By pythagorean theorem ie , a² = b² + c²

(2x + 1)² = x² + 15²

4x² + 1 + 4x = x² + 225

3x² + 4x -224

(3x +28)(x-8)

x = -9.33 , 8

Since, length can't be negative

x = 8

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Hope it helps now.

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3 years ago

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9.1(6)+8.7(7)=_+60.9<br> How do I solve this?

timurjin [86]

Answer:

The answer is <u>54.6</u>.

9.1(6)+8.7(7)=<u>54.6</u>+60.9

Step-by-step explanation:

Given:

9.1(6)+8.7(7)=_+60.9

Now, to solve it:

9.1(6)+8.7(7)=_+60.9

Let the _be x.

So, we remove parenthesis first that makes it multiply with the number next to it:

$9.1\times 6+8.7\times 7=x+60.9$

$54.6+60.9=x+60.9$

Now adding on L.H.S:

$115.5=x+60.9$

Subtracting on both sides by 60.9 we get:

$54.6=x$

$x=54.6$

Therefore, the answer is 54.6.

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3 years ago