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aleksley [76]
3 years ago
11

I CANNOT get this one wrong. I just don't understand this.​

Mathematics
1 answer:
BartSMP [9]3 years ago
5 0

Answer:

C. 90°

Step-by-step explanation:

ΔEFG ≅ ΔJKL

E ---> J       F ---> K      G ----> L

∠ J ----> ∠ E

∠ J = 90°

∠ E = 90°

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In \triangle BCD,△BCD, \overline{BC}\cong \overline{DB}
Mariana [72]

Answer:16.5

Step-by-step explanation: x+x+147=180

2x+147=180

2x=33

2x=33 divide by 2

x=16.5

8 0
3 years ago
1.An ice cream cone has a radius of 3 inches and a height of 5 inches. Which measurement is the closest to the volume in cubic i
Murljashka [212]
First question
Volume = height * radius*radius*3.14
5*3*3*3.14 = 141.3 in3

Second qustion
Violume = height * radius * radius * 3.14
28*8*8*3.14= 5626.88 cm3
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4 0
3 years ago
Read 2 more answers
Y=-2x+4 y=6x+12 substitution method
sergey [27]

Answer:

x = - 1, y = 6

Step-by-step explanation:

Given the 2 equations

y = - 2x + 4 → (1)

y = 6x + 12 → (2)

Substitute y = 6x + 12 into (1)

6x + 12 = - 2x + 4 ( add 2x to both sides )

8x + 12 = 4 ( subtract 12 from both sides )

8x = - 8 ( divide both sides by 8 )

x = - 1

Substitute x = - 1 into either of the 2 equations and solve for y

Substituting into (2)

y = 6(- 1) + 12 = - 6 + 12 = 6

Solution is (- 1, 6 )

6 0
3 years ago
Proving Pythagorean Theorem
MrRissso [65]

Answer:

45

Step-by-step explanation:

{a}^{2}  +  {b}^{2}  =  {c}^{2}

ssubstitute a and b for any of the numbers (3 or 6) and get 36+9 which is 45

45 =

{c}^{2}

so you would need to find the square root to get c

4 0
2 years ago
Find 72 degrees and 40 degrees from the picture​
polet [3.4K]

Answer:a) 5 sides

b) 9 sides

Step-by-step explanation:

a) Since the polygon is a regular polygon, all the interior angles are equal. If one exterior angle is 72 degrees, the interior angle would be

180 - 72 = 108 degrees(sum of the angles on a straight line is 180 degrees)

The sum of the interior angles of a polygon is expressed as

180(n - 2)

Where n represents the number of sides that the polygon has. Since the interior angles are equal, then

108n = 180(n - 2)

108n = 180n - 360

180n - 108n = 360

72n = 360

n = 360/72 = 5

b) If one exterior angle is 40 degrees, the interior angle would be

180 - 40 = 140 degrees

Since the interior angles are equal, then

140n = 180(n - 2)

140n = 180n - 360

180n - 140n = 360

40n = 360

n = 360/40 = 9

7 0
3 years ago
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