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11Alexandr11 [23.1K]
3 years ago
6

Mr. Coleman has 30 students in his science class. He noticed that 27 of those students use backpacks to carry their books.

Mathematics
2 answers:
Mandarinka [93]3 years ago
6 0
The answer is %90.

If 27 out of 30 students use backpacks to carry books %90 of the class uses backpacks to carry books
Grace [21]3 years ago
3 0

Answer:

90%

Step-by-step explanation:

Calculate the percentage as

(number with backpacks ) ÷ (total students in class ) × 100% , that is

\frac{27}{30} × 100%

= \frac{9}{10} × 100%

= 0.9 × 100% = 90%

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Please help me answer this question.
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4 6/9 + 7/9 = 5 3/9
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5 3/9 or 5 1/3
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The home for sale is listed at $150,000.00. They have $30,000.00 for a down payment and are qualified for a fixed rate 30-year m
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PLEASE HELP.
krek1111 [17]

Answer:

Part a) The radii are segments AC and AD and the tangents are the segments CE and DE

Part b) DE=4\sqrt{10}\ cm

Step-by-step explanation:

Part a)

we know that

A <u>radius</u> is a line from any point on the circumference to the center of the circle

A <u>tangent</u> to a circle is a straight line which touches the circle at only one point. The tangent to a circle is perpendicular to the radius at the point of tangency.

In this problem

The radii are the segments AC and AD

The tangents are the segments CE and DE

Part b)

we know that

radius AC is perpendicular to the tangent CE

radius AD is perpendicular to the tangent DE

CE=DE

Triangle ACE is congruent with triangle ADE

Applying the Pythagoras Theorem

AE^{2}=AC^{2}+CE^{2}

substitute the values and solve for CE

14^{2}=6^{2}+CE^{2}

CE^{2}=14^{2}-6^{2}

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CE=\sqrt{160}\ cm

CE=4\sqrt{10}\ cm

remember that

CE=DE

so

DE=4\sqrt{10}\ cm

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3 years ago
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