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anzhelika [568]
3 years ago
14

How many solutions are there to the equation n^2-13n=-40

Mathematics
2 answers:
Marizza181 [45]3 years ago
8 0
It has 2 real solutions which are 5 and 8
Nitella [24]3 years ago
4 0

Answer:

n = 5

n = 8

Step-by-step explanation:

n^2 - 13n = -40

Equate everything to zero

n^2 - 13n + 40 = 0

Factorise

(n - 5)(n - 8) = 0

Either

n - 5 = 0

Add 5 to both sides

n - 5 + 5 = 0 + 5

n = 5

Or

n - 8 = 0

Add 8 to both sides

n - 8 + 8 = 0 + 8

n = 8

n = 5 or

n = 8

It has two real solutions

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ALGEBRA<br> EQUATION<br> PLEASE HELP ASAP<br><br> -3=12y-5(2y-7)
Dovator [93]

Simplify:

−3=12y−5(2y−7)

−3=12y+(−5)(2y)+(−5)(−7)(Distribute)

−3=12y+−10y+35

−3=(12y+−10y)+(35)(Combine Like Terms)

−3=2y+35

Flip the equation.

2y+35=−3

Subtract 35 from both sides.

2y+35−35=−3−35

2y=−38

Divide both sides by 2.

2y/2=−38/2

y=−19


3 0
3 years ago
Read 2 more answers
Stuck in this problem help please
marta [7]
Use trigonometry.

tan30° = perpendicular / base

Here for angle 30° , x is perpendicular while 10 is the base.

tan30° = 1/√3
1/√3 = x/10
x = 10/✓3

By rationalising
x = 10√3/3

Hope This Helps You!
3 0
3 years ago
You get a 3% commission on all sales. This month, you made a sale of $45,050 and
shtirl [24]

Answer:

$1,555.06

Step-by-step explanation:

8 0
3 years ago
I do not understand this question
77julia77 [94]

1. I think the underlined number is 2. So It will be hundredths.

2.  (8 x 100) + (6 x 10) + (3 x 1) + (1/10) + (4/100) + (1/1000)

 Or 800 + 60 + 3 + 0.1 + 0.04 + 0.001

6 0
3 years ago
Read 2 more answers
If someone could please explain or show me how to get the answer that would be great! I want to keep learning throughout this co
belka [17]
I do not understand nothing
6 0
2 years ago
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