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3241004551 [841]
3 years ago
15

Determine whether 8x + 18 + x is equivalent to 9(2+x) Complete the sentence to justify your answer

Mathematics
2 answers:
erastovalidia [21]3 years ago
8 0
Idk lol that’s why I’m on this app
AlekseyPX3 years ago
6 0

Answer:

Yes they are equivalent

Step-by-step explanation:

8x + 18 + x = 9x + 18

9(2+x) = 18 + 9x = 9x + 18

Therefore, 8x + 18 + x is equivalent to 9(2+x)

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1.
Bad White [126]

first polygon

ext. angle=180°-120°

=60°

ext \: ang =  \frac{360}{n}

n=360°/60°

n=6

second polygon

n=2(6)=12

ext. ang= 360°/n = 360°/12° = 30°

int. ang = 180°-30°= 150°

answer is C

6 0
3 years ago
Find the measure of Angle A. (include and explanation so I could do the rest on my own, preferably :)
castortr0y [4]

Answer:

13) Angle A is 30°

14) Angle A is 45°

15) Angle A is 40°

16) Angle A is 40.5°

Step-by-step explanation:

By the angle sum theorem for the interior angles of a triangle, we have;

13) 130° + 2·x + 3·x = 180°

∴ 2·x + 3·x = 180° - 130° = 50°

2·x + 3·x = 5·x = 50°

x = 50°/5 = 10°

∠A = 3·x = 3 × 10° = 30°

∠A = 30°

14) 3·x + 9 + 4·x + 9 + 78° = 180°

7·x + 18 + 78° = 180°

7·x = 180° - (18 + 78)° = 180° - 96° = 84°

x = 84°/7 = 12°

∠A = 3·x + 9 = 3 × 12° + 9 = 45°

∠A = 45°

15) 90° + x + 51 + x + 61 = 180°

∴ x + 51 + x + 61 = 180° - 90° = 90°

2·x + 112 = 90°

2·x = (90 - 112)° = -22°

x = -22°/2 = -11°

x = -11°

∠A = x + 51 = -11° + 51 = 40°

∠A = 40°

16) x + 79 + x + 49 + 70° = 180°

x + x  = (180 - 70 - 79 - 48)° = -17°

2·x = -17°

x = -17°/2 = -8.5°

x = -8.5°

∠A = x + 49 = (-8.5 + 49)° = 40.5°

∠A = 40.5°.

3 0
3 years ago
What is the median of the data? 68,69,71,71,71,73,74,75,75,78 answers: 71,72,78,72.5
Klio2033 [76]
The answer is 72 because ur supposed to do (71+73)/2
5 0
3 years ago
Read 2 more answers
Given f (x) = 3x + 4, find f (2).
stealth61 [152]

f(2) = 3 \cdot 2 + 4 = 6 + 4 = 10

8 0
3 years ago
Write 5 7/8 as an improper fraction
Likurg_2 [28]
5 7/8 is 47/8

Because,

You multiply 5 and 8 and then add 7, then you keep the denominator.
6 0
3 years ago
Read 2 more answers
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