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VikaD [51]
3 years ago
14

I think of a number multiply by two then subtract 9

Mathematics
1 answer:
EastWind [94]3 years ago
3 0

Answer:

2n - 9

Step-by-step explanation:

Let the number be n.  Then "a number multiply by two then subtract 9" yields

2n - 9

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PLS SOLVE AND EXPLAIN
Sonja [21]
The answer to the question

6 0
3 years ago
What is the fourth term of this sequence?<br> (explanations appreciated!)
xxTIMURxx [149]

Answer:

Forth term of the sequence is 61

Step-by-step explanation:

Let's just go from a1 to a4:

a1 = 5

a2 = 2x5+3 = 13

a3 = 2x13+3 = 29

a4 = 2x29+3 = 61

7 0
3 years ago
Solve for x: 2+3 (x+2x) = -2x(2-4) +1
Ronch [10]

Answer:

x = -1/5

Step-by-step explanation:

2+3 (x+2x) = -2x(2-4) +1

Combine like terms

2+3(3x) = -2x (-2) +1

Distribute

2+9x = 4x +1

Subtract 4x from each side

2+9x-4x = 4x+1-4x

2+5x = 1

Subtract 2 from each sdie

5x = 1-2

5x = -1

Divide by 5

5x/5 = -1/5

x = -1/5

7 0
3 years ago
If there are 100 students in a Masters Degree program at OU, and there`s a 5% failure rate, how many students are left after 12
Leviafan [203]
5% fail
so 100-5=95% are left

percent means parts out of 100
95% of 100 is \frac{95}{100} times 100=95

95 students are left assuming that the 5% that fail fail within 12 months
5 0
3 years ago
Find two consecutive whole numbers such that the sum of their squares is 221.
Law Incorporation [45]
n^2+(n+1)^2=2n^2+2n+1=221
2n^2+2n=220
n^2+n=110
n^2+n-110=0
(n-10)(n+11)=0\implies n=10,n=-11

But since n must be a whole number, we ignore n=-11. So the two integers are n=10 and n+1=11.
7 0
3 years ago
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