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Vlad [161]
3 years ago
7

Simplify 9 to the 2nd over 9 to the 7th.

Mathematics
2 answers:
Anestetic [448]3 years ago
5 0
81/4782969
9/531441
3/177146
1/59049
antiseptic1488 [7]3 years ago
4 0

Answer:

The simplified form of \frac{9^2}{9^7} is \frac{1}{9^5}.

Step-by-step explanation:

Consider the provided information.

9 to the 2nd over 9 to the 7th

This can be written as:

\frac{9^2}{9^7}

Use the quotient rule of exponent:

\frac{a^m}{a^n}=a^{m-n}

By using the above rule.

9^{2-7}

9^{-5}

Now use the negative exponent rule: a^{-n}=\frac{1}{a^n}

By using the above rule:

9^{-5}=\frac{1}{9^5}

Hence, the simplified form of \frac{9^2}{9^7} is \frac{1}{9^5}.

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Y = 4(3 + 1)
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Step 1- turn mixed number into improper fraction.

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3 years ago
The width of a rectangle is 75% the length of the rectangle. the perimeter of the rectangle is 42 inches. a circle is drawn that
matrenka [14]

Answer:

  x = 56.25

Step-by-step explanation:

The sides of the rectangle are in the ratio 3:4, so those together with the diagonal of the rectangle make a 3-4-5 right triangle. The sum of these adjacent-side ratio units is 3+4 = 7, so the perimeter in ratio units is 2×7 = 14. The actual perimeter is 42 inches, so each ratio unit must stand for ...

  (42 in)/(14 units) = 3 in/unit

The diagonal of the rectangle is the diameter of the circle. Its length is 5 units, or ...

  (5 units)×(3 in/unit) = 15 inches.

Then the radius is half the diameter, or 7.5 inches.

The area of a circle is given by ...

  A = πr² = π(7.5 in)² = 56.25π in²

The value of x is 56.25.

4 0
3 years ago
Simplifying algebraic expressions 7d+d use d=9
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5 0
3 years ago
Help me with a. b. c. I need help
hammer [34]

Answer:

a) Perimeter = 20.5 Inches

   Area is 15 Sq Inches

b) Perimeter is 61.4 Cms

    Area is 210 Sq cm

c) Perimeter is 22 yards

   Area is 21 Sq Yards

Step-by-step explanation:

a) Perimeter = sum of all the sides

= 8+7.5+5

=20.5

Perimeter = 20.5 Inches

Area of Triangle =\frac{1}{2} \times height \times Base

Base = 7.5 In

Height = 4 In

A = \frac{1}{2} \times 4 \times 7.5

A = 2 \times 7.5

A = 15

Hence Area is 15 Sq Inches

b)  Perimeter = Sum of all the sides

P=13+23+13.4+12

P=61.4

Perimeter is 61.4 Cms

Area of trapezium = \frac{1}{2} \times height  \times (sum \ of \ parallel \ sides)

A= \frac{1}{2} \times 12 \times (12+23)

A= 6 \times 25

A=210

Area is 210 Sq cm

c) Perimeter = Sum of all the sides

P = 7+4+7+4 ( as Opposite sides are equal in a parallelogram

P = 22

Perimeter is 22 yards

Area of a parallelogram = base \times height

A= 7 \times 3

A = 21

Area is 21 Sq Yards

3 0
3 years ago
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