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lilavasa [31]
3 years ago
9

-2/5 - 4/5 + -9/10 = ??? Please help, will mark brainliest for answer with an explanation

Mathematics
1 answer:
NeX [460]3 years ago
5 0

Answer:

Step-by-step explanation:

-2/5 - 4/5 + -9/10

= -2/5 - 4/5 - 9/10

= {-2(2) -4(2) - 9)/10

= (-4 - 8 - 9)/10

= -21/10

= -2 1/10

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The cheerleading squad at Belmont High School currently has 4 members. That is 20% fewer than were on it with the old coach. How
Sliva [168]

Answer:

20

Step-by-step explanation:

Divide 4 by 20%

20 cheerleaders.

5 0
3 years ago
URGENT 30 points I need help
Ostrovityanka [42]

Answer:

<em>- 112 + 100 n</em>

Step-by-step explanation:

a_{n} = a_{1} + (n - 1 )d

~~~~~~~

a_{1} = - 12

d = 100

a_{n} = - 12 + 100( n - 1 )

a_{n} = - 12 + 100n - 100

a_{n} <em>= - 112 + 100 n</em>

4 0
2 years ago
Need help!
chubhunter [2.5K]

The correct equation is P(t) = Po*e^(kt). Please enclose "kt" inside parentheses and use the " ^ " symbol to indicate exponentiation.


"k" is the growth constant, which here is 0.017. "t" is the number of yeasrs. P(7) is the population after 7 years. Po is the initial population, which in this case is 91 million.


The initial value, when t = 0, is 91 million.


After 7 years, the population, P(7), was P(7) = (91 million)*e^(0.017*7). This evaluates to P(7) = (91 million)*(1.070) = 96 million

8 0
3 years ago
The volume of clay used to build a cylindrical pillar with a height of 9 centimeters is 324 pi cubic centimeters. The area of th
Marta_Voda [28]

Answer:

36 (Fill 3 in the blank)

Step-by-step explanation:

Given:

Volume of a cylinder = 324 π

Height = 9 cm

The formula to find the volume of a cylinder = Base area * height.

Base is a circle. So the area of a circle = πr^2

Volume of the cylindrical pillar = πr^2 h

324 π = πr^2 . 9

πr^2 = 324 π /9

πr^2 = 36 π

The area of the base = 36 π

Thank you.

7 0
3 years ago
Read 2 more answers
Charlie drove 864 miles in 12 hours. at the same rate, how long would it take him to drive 504 miles?
katrin2010 [14]
We can solve this by setting up a proportion where 864/12 = 504/x. We cross multiply and get 864x = 504 * 12. So 864x = 6048. Divide by 864 on both sides, x = 7.

It would take Charlie 7 hours to drive 504 miles. 
5 0
3 years ago
Read 2 more answers
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