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Helga [31]
3 years ago
13

A student thinks that the regular pentagon in the diagram

Mathematics
1 answer:
Nadya [2.5K]3 years ago
4 0

Answer:

A

Step-by-step explanation:

The student must have thought that every single arrowhead is a line of symmetry, so since there are 10 arrowheads, there must be 10 lines of symmetry. This is incorrect because if you look closely at the diagram, each line has 2 arrowheads, so the student is overcounting by a factor of 2. They should have just counted the number of lines, not arrowheads. Therefore, there must be 10/2 = 5 lines of symmetry, not 10. Hope this helps!

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If the system below were written as a matrix equation, by which matrix could you multiply both sides to obtain a solution?
ludmilkaskok [199]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Below are the choices:

A. 
<span>[8 -6] </span>
<span>[-5 4] </span>
<span>B. </span>
<span>[4 -3] </span>
<span>[-2.5 2] </span>
<span>C. </span>
<span>[-4 5] </span>
<span>[6 -8] </span>
<span>D. </span>
<span>[-2 2.5] </span>
<span>[3 -4]
</span>
B because it is the inverse of 
<span>(4 6) </span>
<span>(5 8) </span>

<span>Check </span>
<span>(4.0 -3)(4 6) = (1 0) </span>
<span>(-2.5 2)(5 8) = (0 1)</span>
3 0
3 years ago
What is the value of the expression (2+4)3÷(26−4)?
My name is Ann [436]
9/11
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8 0
3 years ago
The price of sugar has increased from ₹32 per kg to ₹40 per kg. The percentage increase in the price of sugar is?
densk [106]

Answer:

Step-by-step explanation:

%change=100(final-initial)/(initial)

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3 0
2 years ago
Read 2 more answers
Bro help me idk this one q-q <br><br>n × 5 + 4 × 2 - 4 × 3 = 42​
lina2011 [118]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
Which of the following is equivalent to x+1/y divided by g+1/h
Vikki [24]

Answer:

B) x + 1/y times h/g+1

Step-by-step explanation:

We need to divide \frac{x+1}{y} by \frac{g+1}{h} then match with given choices to find the correct equivalent result.

where given choices are:

A) x/y times h/g

B) x + 1/y times h/g+1

C) x+ 1/y divided h/g+1

D) y/x+1 divided g+1/h

So let's divide  \frac{x+1}{y} by \frac{g+1}{h}

\frac{\left(\frac{x+1}{y}\right)}{\left(\frac{g+1}{h}\right)}

we are allowed to flip the bottom fraction and change division sign into multiplication. So we get:

=\left(\frac{x+1}{y}\right)\cdot\left(\frac{h}{g+1}\right)

Hence correct choice is: B) x + 1/y times h/g+1

3 0
3 years ago
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