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Arisa [49]
3 years ago
5

(( I will give 25 points and brainy from right answers (Please answer all!!) )

Mathematics
1 answer:
sleet_krkn [62]3 years ago
6 0
1. C. Concave pentagon

2. A. 1620°

b/c (11 - 2) × 180 = 1620

3. B. 165°

b/c (24 - 2) × 180 ÷ 24 = 165

4. A. 160°

b/c (18 - 2) × 180 ÷ 18 = 160
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Okay I need help por fvaor
Rasek [7]

Answer:

523.6 (this answer is estimated)

Step-by-step explanation:

4/3*5^3*pi

8 0
3 years ago
Read 2 more answers
I need an answer asap please, it’s the last question
swat32
$8
2 pizzas = $24
5 drinks = $10
$6 tip
24+10+6 = 40
Since it’s 5 friends, divide by 5
40/5 = 8
Each person pays $8
7 0
3 years ago
A chemist begins studying a radioactive sample that has a mass of 450 grams.
77julia77 [94]

Answer:

The question should say..... How much of the sample is left in......FIVE.....weeks? At least that is what I think you want to know.

The answer is 318.13 grams.

Step-by-step explanation:

450 - 6.7% = 419.85 grams ---- End of week 1

419.85 - 6.7% = 391.72 grams ---- End of week 2

391.72 - 6.7% = 365.47 grams ---- End of week 3

365.47 - 6.7% = 340.98 grams ---- End of week 4

340.98 - 6.7% = 318.13 grams ------ End of week 5

5 0
3 years ago
I WILL MARK BRAINLIEST Twelve is added to a number and then the sum is multiplied by 4/5 to give 23.6. What is the number?
Aliun [14]

Answer: 17.5 or 35/2

Step-by-step explanation:

(If you change 4/5 to a decimal, it makes this easier. 4/5 would be 0.8.)

23.6 = (12 + x)*0.8

23.6 = 9.6 + 0.8x

14 = 0.8x

17.5 = x

17.5 as an improper fraction would be 35/2.

7 0
3 years ago
Answer the questions in the pics
Aneli [31]
I think the answer is B
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3 years ago
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