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scoundrel [369]
2 years ago
13

I need help with this question thanks!

Mathematics
2 answers:
cluponka [151]2 years ago
7 0

Answer:

n=-10

Step-by-step explanation:

-3n+20=50 move constant to the right hand side

<em>-3n</em><em>=</em><em>5</em><em>0</em><em>-</em><em>2</em><em>0</em><em> </em><em>subtract</em><em> </em><em>the</em><em> </em><em>numbers</em>

<em>-3n</em><em>=</em><em>3</em><em>0</em><em> </em><em>divide</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>by</em><em> </em><em>-</em><em>3</em><em> </em><em>and</em><em> </em><em>the</em><em> </em><em>answer</em><em> </em><em>is</em><em> </em><em>n</em><em>=</em><em>-</em><em>1</em><em>0</em>

Zepler [3.9K]2 years ago
6 0

Answer:

n= -10

Step-by-step explanation:

50-20= 30 so -3n=30. So n= -10.

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The area of a semi circle is 20
alisha [4.7K]

Answer:

A = 157 in^2

Step-by-step explanation:

First, we need to get the radius, we can do this by dividing our given diameter by 2.

20/2 = 10

Now, we have our radius of 10 inches.

Formula for Area of a Semi Circle: (1/2)(pi(r^2)

Input values.

(1/2)(3.14(10^2)

Solve.

(1/2)(3.14(100)

(1/2)(314)

1/2(314) = 157

Finally, we have our result which is 157 inches^2.

3 0
3 years ago
Read 2 more answers
Tiffany wants to buy a sweater with a selling price of $187. Today, the sweater is on sale for 31% off. What is the markdown? Wh
Akimi4 [234]
The sale price would be $129.03
7 0
3 years ago
Read 2 more answers
Find the simple interest earned to the nearest cent for each principal, interest rate, and time.
Y_Kistochka [10]

Answer:

Interest earned at 3.9 percent rate is $31.2

Interest earned at 2 percent rate is $5.8

Step-by-step explanation:

A = P(1 + rt)

Where 'A' is the amount, 'r' is the rate and 't' is the time in years

When;

P = $1200

r = 3.9%

t = \frac{8}{12} years

Then,

A = $1200(1 + 0.039(\frac{8}{12}))

A = $1200 + $31.2 = $1231.2

Interest = Amount - Principal

Interest earned at 3.9 percent rate is $1231.2 - $1200 = $31.2

When;

P = $580

r = 2%

t = \frac{6}{12} years

Then,

A = $580(1 + 0.02(\frac{6}{12}))

A = $580 + $5.8 = $585.8

Interest earned = Amount - Principal

Interest earned at 2 percent rate = $585.8 - $580 = $5.8

4 0
3 years ago
X^2 - 36 = 0.
strojnjashka [21]

Answer:

(x+6)(x−6)=0

x=-6 or x=6

Step-by-step explanation:

X^2 - 36 = 0

Solve by Square Root

add 36 both sides

x^2−36+36=0+36

x^2=36

square root

x=±√36

x=6 or x=−6

You can do that or for 2nd option

Solve by factoring

x^2-36=0

(x+6)(x−6)=0

Set factors equal to 0

x+6=0 or x−6=0

x=-6 or x=6

PLEASE NOTE: 36 is the square of 6

and

x2  is the square of  x1

8 0
3 years ago
Sue wrote a double facts.It has a sum less than 10 and greater than 4.The addends are each less than 5.What fact might she have
Eduardwww [97]
Maybe 2+3 is the answr

6 0
3 years ago
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