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lidiya [134]
3 years ago
11

PLEASE HELP!!!

Mathematics
1 answer:
Jobisdone [24]3 years ago
6 0
The answer it 1. is A.
The answer to 2. is B.
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Find the non-extraneous solutions of the square root of the quantity x plus 6 minus 5 equals quantity x plus 1.
denis23 [38]
(x+6)^(1/2)-5=x+1
(x+6)^(1/2)=x+6
((x+6)^(1/2))^2=(x+6)^2
x+6=x^2+12x+36
0=x^2+11x+30
(-11+(11^2-4(1)(30))^(1/2))/2
(-11+((1)^(1/2))/2
(-11+1)/2=-5
(-11-1)/2=-6
((-6)+6)^1/2-5=(-6)+1
(0^(1/2))-5=-5
-6 is non-extraneous
((-5)+6)^1/2-5=(-5)+1
(1^1/2)-5=-4
1-5=-4
-4=-4
-5 is non-extraneous

3 0
3 years ago
If 9 pairs of jeans cost $121.50 find the cost of 5 pairs
tatuchka [14]

121.50 divided by 9 is 13.50. 13.50 times 5 equals 67.50

7 0
3 years ago
Read 2 more answers
52 thousandths in scientific <br> notation
In-s [12.5K]
The answer is,

"52 thousandths = 0.052

5.2 x 10^-2"
3 0
3 years ago
If f(x)=1/9x-2 , what is f–1(x)?
Anna71 [15]
Lets get started :)

f(x) = \frac{1}{9}x - 2
 y   = \frac{1}{9}x - 2
This is the original equation, and now we have to find the inverse.

When finding the inverse, just flip the variables, x as y and y as x

f ⁻¹(x) 
  ↓
x = \frac{1}{9}y - 2
We have to isolate y as it is our f ⁻¹(x)

Take 2 to the other side { When you see subtraction, you do addition }
x + 2 = \frac{1}{9} y

Take 9 to the other side { When you see division, you do multiplication }
9 ( x + 2 ) = y
9x + 18 = y

f ⁻¹ (x) = 9x + 18


7 0
3 years ago
Which model represents this word problem?
Monica [59]

Answer:

9

Step-by-step explanation:

if she has 14 and then spends 5 she will have 9. 4-5=9

5 0
3 years ago
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