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lions [1.4K]
3 years ago
8

Multiply: (5t - 4)(4t + 5)

Mathematics
1 answer:
ANEK [815]3 years ago
5 0

Answer:

A. 20t² + 9t - 20

Step-by-step explanation:

(5t × 4t) + (5t × 5) - (4 × 4t) - (4 × 5)

= 20t² + (25t - 16t) - 20

= <u>20t² + 9t - 20</u> (A)

<em>Hope </em><em>this </em><em>is </em><em>h</em><em>e</em><em>l</em><em>p</em><em>ful </em><em>and </em><em>useful </em><em>:</em><em>)</em>

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Please help! this is due today and this is the only question left!!
Soloha48 [4]

Answer:

13.73 sq mm

Step-by-step explanation:

Area of Square - Area of Circle = Area of Shaded Region

if radius of circle is 4 then diameter is 8

the diameter is the same as the length of each side of the square

so area of square = 8² or 64

Area of Circle = 16π

64 - 16π ≈ 13.73

7 0
3 years ago
Help me out please!!​
Alexeev081 [22]

Answer:

Form: 2^7, 2^7 = 128

Step-by-step explanation:

You cannot multiply exponent, you must add the exponents.

4 + 3 = 7.

Keep the base the same.

Then find what 2^7 is.

Multiply:

2 x 2 x 2 x 2 x 2 x 2 x 2.

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3 years ago
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goldfiish [28.3K]

Answer:

1. 57       2. 81

Step-by-step explanation:

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5103/63= 81

5 0
3 years ago
Find the missing side and angles.
sweet [91]

Answer:

Step-by-step explanation:

This is an equilateral triangle.

The altitude bisects the 60 degree angle, so a=30

b=60 since its an interior angle of the isosceles triangle.

e = 4 since the two triangles formed by the altitude are congruent.

c = 8 since the side length is 4 + 4 = .

f = 4sqrt3 by the properties of 30 60 90 triangles.

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2 years ago
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