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BARSIC [14]
3 years ago
5

Please help with these few!!?​

Mathematics
1 answer:
nekit [7.7K]3 years ago
7 0

Answer:

Triangle 6: 74

Triangle 7: 29

Triangle 8: 61

Triangle 9: 33

Step-by-step explanation:

Every triangle has a total degree angle of 180 degrees. Add the two sides that  are known and subtract the sum from 180 degrees to find out the last angle.

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What is the Surface area of a cylinder with a radius of 5in and height of 4in
9966 [12]

Answer:

282.74in 2

Step-by-step explanation:

r Radius = 5in

h Height = 4in

3 0
2 years ago
Help on 3. And 4. Thank you!
chubhunter [2.5K]

Answer:

#3.) The initial value of  16 gal at  x = 5 minutes means that 16 gallons of water was present 5 minutes after the barrel started leaking.

#4.) Find how many minutes until the barrel is empty of water.

Let y = 0,  to solve for time x.

0 = (-2/5)*x + 18

(2/5)*x = 18

x = (5/2)* 18 = 5*9 = 45 minutes

Up to and after 45 minutes, the barrel is empty of water.

Step-by-step explanation:

#2.)  

minutes:      5, 10, 15, 20

water(gal):  16, 14, 12, 10

Find slope:    slope m = (14 - 16)/(10 - 5) = -2/5

y - 10 = (-2/5)*(x - 20)

y - 10 = (-2/5)* x  + 8

y = (-2/5)*x + 18

rate of change slope means that for every minute  2/5 gallons of water is lost

#3.) The initial value of  16 gal at  x = 5 minutes means that 16 gallons of water was present 5 minutes after the barrel started leaking.

#4.) Find how many minutes until the barrel is empty of water.

Let y = 0,  to solve for time x.

0 = (-2/5)*x + 18

(2/5)*x = 18

x = (5/2)* 18 = 5*9 = 45 minutes

4 0
3 years ago
Please answer this thanks
-BARSIC- [3]

Answer:

ED = 32.5

BE = 14.4

Step-by-step explanation:

Ab = 20

AC = AB + 5 = 20 + 5 = 25

AC / AB = 1.25

AB * 1.25 = AC

This means that:

AE * 1.25 = ED

CD / 1.25 = BE

AE * 1.25 = ED

26 * 1.25 = 32.5

CD / 1.25 = BE

18 / 1.25 = 14.4

4 0
3 years ago
Read 2 more answers
During a sale, a bookstore sold 250 books. At the end of the sale, the store has 75% of the original number of books. How many b
shutvik [7]
90 books would be left I believe I just took 250/9 since it would take 9 quarters to make $2.50 and since 75% was gone that would mean 25% is left so your answer is 90 unless it’s not but I believe it’s right.
5 0
3 years ago
Let f(x)=x+7 and g(x)=x-4 Find f(x) x g(x)
Sveta_85 [38]

Answer:

C. x²+3x-28

Step-by-step explanation:

f(x) = x +7

g(x) = x -4

f(x) · g(x) = (x-4)(x+7)

              = x²+7x-4x-28

              = x²+3x-28

3 0
3 years ago
Read 2 more answers
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