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Anastaziya [24]
4 years ago
9

in  mrs. middleton's math class, there are 7 more boys than girls. if there are  29 total students in the cla

ss, how many boys are there?
Mathematics
2 answers:
Vadim26 [7]4 years ago
7 0
17 boys and 12 girls
Bas_tet [7]4 years ago
4 0
You have 17 guys and 12 girls
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The sum of the circumference of two circles is 38π cm and the sum of their areas is 193π cm². Calculate the radii of the circles
sdas [7]

Answer:

The radii of the circles are 12 cm and 7cm.

Step-by-step explanation:

Let the radii of the circles be r_{1}\ and\ r_{2}

Given:

Sum of circumference of two circles= 38π cm

Formula for circumference of a circle with radius r = 2πr

2\pi r_{1}+2\pi r_{2}=38\pi \\r_{1}+r_{2}=19------------1

Sum of areas of two circles= 193π cm²

Area of circle with radius r = πr²

\pi r_{1}^{2}+\pi r_{2}^{2}=193\pi \\r_{1}^{2}+r_{2}^{2}=193-------2

Substituting r2 = 19 - r1 in equation 2 we get:

r_{1}^{2}+(19-r_{1})^{2}=193\\2r_{1}^{2}-38r_{1}+168=0\\r_{1}^{2}-19r_{1}+84=0\\(r_{1}-12)(r_{1}-7)=0\\r_{1}=12\ or\ 7

Then r2 = 19 - r1

r_{2}=12\ or\ 7

7 0
3 years ago
Complete the net worth statement. What is the net worth of the individual?
Shtirlitz [24]

Considering it's concept, it is found that the net worth of the individual is given by:

D) $26,595.

<h3>What is the net worth of an individual?</h3>

It is given by the <u>sum of the individual assets subtracted by the sum of it's liabilities</u>.

Researching the problem on the internet, we have that:

  • The sum of the assets, in dollars, is of 545 + 165000 + 6100 = 171645.
  • The sum of the liabilities, in dollars, is of 144000 + 1050 = 145050.

Hence, his net worth is given by:

N = 171645 - 145050 = $26,595.

More can be learned about net worth at brainly.com/question/12371230

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2 years ago
4. (09.01 LC)
Rina8888 [55]

Answer:

73

Step-by-step explanation:

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3 years ago
What's the answer please, I need help
mezya [45]

Answer:

Ano pong sa Sagutin diyan

Step-by-step explanation:

hindi ko op maintiddihan sorry po

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3 years ago
hopi sue drops a ball from 25 feet above a lake. the formula t=, describes the time in seconds that the ball is h feet above the
Monica [59]
Oh yeah sweetie no lol oh okie so
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3 years ago
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