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AfilCa [17]
3 years ago
14

HELP NEEDED!!!

Mathematics
1 answer:
wolverine [178]3 years ago
8 0

Step-by-step explanation:

Side length of heptagon = 20.3cm / 7 = 2.9cm.

The heptagon is made out of 7 congruent triangles, each with height 3.0cm and base 2.9cm

Hence area of heptagon

= 7 * [(0.5)(3.0cm)(2.9cm)]

= 7 * 4.35cm²

= 30.45cm².

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If f(x) = 2x and g(x) = x²-1, which statement is true?
Temka [501]

Answer:

Maybe A. im on the test so idk

Step-by-step explanation:

4 0
3 years ago
Angle DEB is 42. State the size of angle ABD
Kay [80]

Answer:

The answer would be 80 ° because 5×( 2 + 13 or x +1 ) is 80

Step-by-step explanation:

ABD is 80°

If DEB is 42 °

∠ ABD = 5(2X+1)

∠ DBC = 3X+6

∠ EBC = Y +135/2

∠ ABD and ∠ DBC are linear pairs

∴ ∠ ABD +∠ DBC = 180

∴ 5(2X+1) + 3X+6 =180

solve for x

∴ x = 13

∴∠ ABD = 5(2X+1) = 5(2*13+1) = 135

 ∠ DBC = 3x+6  = 3*13+6 = 45

∠ ABD  and ∠ EBC are vertical angles

∴ ∠ ABD = ∠ EBC = 135

∴ y +135/2 = 135

∴ y = 135/2

5 0
3 years ago
Which of the following systems is represented by the graph?
gulaghasi [49]

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Red

Step-by-step explanation:

3 0
3 years ago
As pointed out, you lose if the pile has 1, 6, 11 or 16 sticks. How many sticks are needed in the next two piles for you to lose
muminat

Answer:

21 and 26 totaling 47sticks

Step-by-step explanation:

Th number of sticks form an arithmetic progression

1, 6, 11, 16...

The nth term of an arithmetic progression is expressed as;

Tn = a+(n-1)d

a is the first term = 1

d is the common difference

d = 6-1 = 11-6 = 5

n is the number of terms

The next two terms are the fifth and sixth term

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T5 = 1+4(5)

T5 = 1+20

T5 = 21

T6 = 1+(6-1)5

T6 = 1+5(5)

T6 = 1+25

T6 = 26

Hence the number of sticks needed in the next two piles are 21 and 26 totaling 47sticks

4 0
3 years ago
What is the value of -2|6x -y| when x-3 and y =4<br>​
lisabon 2012 [21]

So, we have been given the following

-2(6x -y)

But, we have also been given heads up that x=-3, and y=4.

So, that would mean the new equation would be the following.

-2(6-3 -4)

After we solve it our answer should be 2!

If this helps then please mark me brainliest!

3 0
3 years ago
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