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4 years ago

Find the 20th term in arithmetic sequence -4, 1, 6, 11, 16,

1 answer:

7 0

For an arithmetic sequence, the nth term = the first term + d(n-1), d is the difference between two neighboring numbers, in this case, d is 5
the 20th term=-4+5(20-1)=91

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the sum of areas of two circles is 80 square meters find the lencgh of radius of each circles if one of them is twice as larger

klemol [59]

Area of a cirlce=πr²
we have two radius:2r and r
area of the cirlce₁ + area of the circle₂=80 m²
area of the circle₁=π(2r)²
area of the circle₂=πr²
Then, we can suggest this quation:

π(2r)²+πr²=80

4πr²+πr²=80
π(4r²+r²)=80
π(5r²)=80
5πr²=80
r²=80/5π
r=√(80/5π)≈2.26

radius of the largest cirlce=2r=2(2.26)=4.51

Answer: the radius of the largest circle is 4.51 m

6 0

4 years ago

Read 2 more answers

A local community college employs 240 full time faculty. Approximately 3/5 of the full time faculty are certified to teach onlin

Dominik [7]

Answer:

There are 144 faculty at the college are certified

Step-by-step explanation:

- A local community college employs 240 full time faculty

∴ There are 240 full time employs

- Approximately 3/5 of the full time faculty are certified to teach online

∴ 3/5 of the total 240 are certified to teach on line

- We need to find how many faculty at the college are certified

To find that multiply the fraction of the certified by the total number

of the full time faculty

∵ The fraction of certified is 3/5

∵ The total of the full time faculty is 240

∴ The number of certified = $\frac{3}{5}$ × 240

∴ The number of certified = 144

There are 144 faculty at the college are certified

7 0

3 years ago

What is the diameter of a circle if the circumference is 18.84 ?

spin [16.1K]

Answer:

Step-by-step explanation:

7 0

2 years ago

Y/m=x solve for y help

Gre4nikov [31]

Answer:

y = mx

Step-by-step explanation:

$\frac{y}{m}$ = x ( multiply both sides by m to clear the fraction )

y = mx

6 0

3 years ago

I need helpppppppppppp

Marat540 [252]

Answer:

1) 22

2) 1/98

Step-by-step explanation:

1) Use the equation (x-7)=15.

2) Use the equation 1/14 * 2/14.

- Hope this helps.

6 0

4 years ago

Read 2 more answers