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Arturiano [62]
3 years ago
14

Write as an algebraic expression and then simplify if possible:

Mathematics
1 answer:
Otrada [13]3 years ago
8 0

Answer:

2n-7

Step-by-step explanation:

"7 less than twice a number n"

is the same as

"7 less than (twice a number n)".

I put ( ) around that one part because I want you to focus on that part first.

Twice a number n means 2 times that number n or 2n.

So now we have

"7 less than 2n".

This means 2n-7.

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Find the sum of all integers 30 to 80. (Is there a formula to do this?
Shkiper50 [21]

Answer:

Add all the numbers from 30 to 80 and that is your answer

Step-by-step explanation:


7 0
3 years ago
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12 customers entered a store over the course of 8 minutes. At what rate were the
scoundrel [369]

Answer:

3 to 1

Step-by-step explanation:

5 0
3 years ago
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Find an equation of the circle that has center (-1,2) and passes through (5,-4).
kherson [118]
General equation for a circle
(x - a)² + (y - b)² = r²
with (a,b) represents the center, (x,y) represents one of the points lie on the circle, and r represents the radius

Determine r² by substituting the points into the general equation
(x - a)² + (y - b)² = r²
(5 - (-1))² + (-4 - 2)² = r²
(5 + 1)² + (-6)² = r²
6² + 36 = r²
36 + 36 = r²
72 = r²

Determine the equation of the circle
(x - a)² + (y - b)² = r²
(x - (-1))² + (y - 2)² = 72
(x + 1)² + (y - 2)² = 72 (This is the equation of the circle)
8 0
3 years ago
How could you convert<br> the 3/8of an inch into sixteenths?
BARSIC [14]

Answer:

6/16

Step-by-step explanation:

To get 16ths multiply both the top and bottom by 2

3*2=6

8*2=16

6/16ths =0.375

3/8ths=0.375

4 0
3 years ago
Help please i only have 3 min to finish
Romashka [77]

Answer: <u><em>I think that the answer should be 2.4</em></u>

<u><em /></u>

Step-by-step explanation: <em><u>The reason why is because they did 2 the 2.2 so their going up by twos I belive making the answer 2.4.</u></em>

3 0
3 years ago
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