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OLEGan [10]
2 years ago
7

Which quadrilaterals have diagonals that are perpendicular?

Mathematics
1 answer:
galben [10]2 years ago
5 0
The quadrilaterals that have perpendicular diagonals, meaning they intersect at 90° angles, are a square, a rhombus, and a kite.
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Use mental math to approximate what a 15% tip would be for a bill of $31.99.
rodikova [14]

The whole bill is $31.99 that is 100%. You can use mental math to determine exatcly 15% from $31.99:

1. 15%=10%+5%

2. To find 10% from $31.99 you should simply divide $31.99 by ten. Thus, 10% from $31.99 is $3.199.

3. 5% is half of 10%, then 5% from $31.99 is $3.199:2=$1.5995.

4. 15% from $31.99 is $3.199+$1.5995=$4.7985≈$4.80.

Answer: correct choice is B.

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3 years ago
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attashe74 [19]

Answer:

3(x+2)

Step-by-step explanation:

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Find the tenth term in the following geometric sequence. 8, 4, 2, 1, . . .
Marrrta [24]

Answer:

  c)  0.0156

Step-by-step explanation:

The general term a[n] of a geometric sequence is given in terms of the first term a[1] and common ratio r as ...

  a[n] = a[1]r^(n-1)

The given sequence has an initial term of a[1]=8 and a common ratio of 4/8=1/2. Then the general term is ...

  a[n] = 8(1/2)^(n-1)

The 10th term is then ...

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  a[10] = 0.015625 ≈ 0.0156

7 0
3 years ago
HELP ASAP SOS!!! <br> QUESTION : write a 4 step proof that triangle ABD is congruent to ABD
SCORPION-xisa [38]

Here are a few reasons:

The triangles have the same three sides

The triangles have the same three angles

The triangles could perfect overlap one another

They have corresponding angles.

Not sure if this helped but I hope so!

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gulaghasi [49]
The quotient of 3489 divided by 6 is 581.
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