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Strike441 [17]
3 years ago
5

What is the product of 3a +5 and 2a^2+ 4a - 2?

Mathematics
1 answer:
love history [14]3 years ago
8 0

Answer:

(3a + 5)(2a^2 + 4a - 2)

=3a(2a^2 + 4a - 2) + 5(2a^2 + 4a - 2)

=6a^3 + 12a^2 - 6a + 10a^2 + 20a - 10

=6a^3 + 22a^2 + 14a - 10

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8.612 a rational number
IgorLugansk [536]

Answer:

yes it is if we can write decimal numbers in the form of a fraction then it is a rational number

7 0
3 years ago
What is the volume of the cone? Cone V = 1/3 Bh V = 1/3 πr2h V = 1/3 π32(8) V = 1 3 π(9)(8) V = 1/3 π(72) The cone has a volume
Amanda [17]

The volume of cone is 24\pi or 75.398 cubic centimeters, if the cone has a radius of 3 centimeters and height of 8 centimeters.

Step-by-step explanation:

The given is,

                  Formula for volume of cone, V = \frac{1}{3} Bh

                  Where, B = \pi r^{2}

                  Volume, V= \frac{1}{3} \pi r ^{2} h

                  From the given,

                           Radius, r = 3 centimeters

                          Height, h = 8 centimeters

                 volume, V= \frac{1}{3} \pi (3 ^{2})( 8)

                                    = \frac{1}{3} \pi (9)( 8)

                                    = \frac{1}{3} \pi (72)

                                    = 24\pi

    Volume of cone, V= 24\pi (volume in terms of \pi )

                                ( or )

                    Volume, V = (24 × 3.14 )                        ( ∵ \pi=3.14 )

                                  V = 75.398 cubic inches

Result:

         The volume of cone is 24\pi or 75.398 cubic centimeters, if the cone has a radius of 3 centimeters and height of 8 centimeters.

3 0
3 years ago
Read 2 more answers
X^{2} -25=0 Please help meeee
-BARSIC- [3]

Answer:

x=5,x=-5

Step-by-step explanation:

x^2-25=0

Add 25 to both sides:

x^2-25+25=0+25

x^2=25

Square root both sides:

x=\sqrt{25},\:x=-\sqrt{25} (Since a negative number multiplied by itself gives positive, there are two answers.)

x=5,x=-5

8 0
4 years ago
Read 2 more answers
1. It refers to the size of a surface. What is it?
raketka [301]
Area of course also just a reminder Area is measured in square units such as square centimteres, square feet, square inches, etc
6 0
3 years ago
Can someone help me on this pls? It’s urgent, so ASAP (it’s geometry)
SashulF [63]

<u>Question 2</u>

1) \overline{PR} \perp \overline{QS}, \overline{PQ} \cong \overline{PS} (given)

2) \overline{PR} \cong \overline{PR} (reflexive property)

3) \angle PRQ and \angle PRS are right angles (perpendicular lines form right angles)

4) \triangle PRQ and \triangle PRS are right triangles (a triangle with a right angle is a right triangle)

5) \triangle PRQ \cong \triangle PRS (HL)

Question 3

1) \angle C is a right angle, \overline{AC} \cong \overline{AE}, \overline{DE} \perp \overline{AB} (given)

2) \angle DEA is a right angle (perpendicular lines form right angles)

3) \triangle ACD and \triangle DAE are right triangles (a triangle with a right triangle is a right angle)

4) \overline{AD} \cong \overline{AD} (reflexive property)

5) \triangle ACD \cong \triangle AED (HL)

6) \angle CAD \cong \angle DAE (CPCTC)

7) \overline{AD} bisects \angle BAC (if a segment splits an angle into two congruent parts, it is an angle bisector)

7 0
2 years ago
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