15 Answer: S₁ = 1 S₂ = 4 S₃ = 13 S₄ = 40 Sum = NO
<u>Step-by-step explanation:</u>
1 + 3 + 9 + 27 + ... 
16 Answer:
<u>Step-by-step explanation:</u>


Answer:
3y+x = 3
Step-by-step explanation:
for the point ( 3,0)
x=3 , y= 0
the equation for the line is given as
y-y1= m(x-x1)
for perpendicular ,
m= -1/x
so
y-0 = -1/3(x-3)
3y= -x +3
3y+x=3
Answer:
-25n - 2
Step-by-step explanation:
- 10n - 12 + 10 - 35n
- -25n - 2
The number is 1
Step-by-step explanation:
Let x be the required number
Then according to given statement
Five times the difference of twice a number and seven is negative twenty-five.

Simplifying

Adding 35 on both sides

Dividing both sides by 10

Verification:
![5[2(1)-7] = -25\\5(2-7) = -25\\5(-5) = -25\\-25=-25](https://tex.z-dn.net/?f=5%5B2%281%29-7%5D%20%3D%20-25%5C%5C5%282-7%29%20%3D%20-25%5C%5C5%28-5%29%20%3D%20-25%5C%5C-25%3D-25)
Hence,
1 is the number
Keywords: Linear equation
Learn more about linear equation at:
#LearnwithBrainly
The answer is 423 since it's the closest number to 400 from all the numbers listed above.
The numbers 351 and 445 would also round to 400 but they are not the closest ones.
Hope it helped,
BioTeacher101