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fredd [130]
2 years ago
7

Write an expression for: half a number decreased by 12.

Mathematics
1 answer:
Gennadij [26K]2 years ago
5 0

Answer:

x/2 - 12

Step-by-step explanation:

let the number be x

half a number means x divide by 2. i.e x/2

when decreased by 12 means x/2 - 12

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Please help, thank you
solmaris [256]

Answer:

1.

8x + 6y = 28

9x + 3y = 39

Set to equal y.

8x + 6y = 28

6y = -8x + 28

y = -8/6x + 28/6

y = -4/3x + 14/3

9x + 3y = 39

3y = -9x + 39

y = -9/3x + 39/3

y = -3x + 13

Set equal to each other.

-4/3x + 14/3 = -3x + 13

Combine like terms.

5/3x = 25/3

Multiply by 3/5

x = 5

Plug x in.

y = -3(5) + 13

y = -15 + 13

y = -2

(5, -2)

2.

-2x - 9y = -3

-7x - 9y= -33

Set equal to y.

-2x - 9y = -3

-9y = 2x - 3

y = -2/9x + 3/9

y = -2/9x + 1/3

-7x - 9y= -33

-9y = 7x - 33

y = -7/9x + 33/9

y = -7/9x + 11/3

Set equal to each other

-2/9x + 1/3 = -2/9x + 1/3

0 = 0

infinitely many solutions

8 0
2 years ago
I need help on this homework
abruzzese [7]

Answer:

Tn=a(n-1)d

T50=261(50-1)-5

T50=12784

5 0
3 years ago
Convert 185 degrees Celsius to degrees Fahrenheit. Round<br> your answer to the nearest degree
lakkis [162]

Hello! :3

Answer:

The Correct Answer is <u><em>365 °F</em></u>

Step-by-step explanation:

The C to F formula is(C ~x~ 9/5) + 32 = F

When we do 185 for C in the formula, we get(185 ~x~ 9/5) + 32 = F.

To solve,  (185 ~x~ 9/5) + 32 = F. we first multiply 9 by 185, then we divide the product by 5, and then finally we add 32 to the quotient to get the answer.

185~x~9=1665

1665  /5=333

333+32=355

Therefore, the answer to 185 C to F is 365 which can be written like this

⇒ 185 °C = 365 °F

hope this helps you!

Have an Awesome Thursday!

-Joseph-

3 0
2 years ago
Please help! This is i-ready it will probably be easy for you.
Radda [10]

Answer:

3$

Step-by-step explanation:

Your right it is easy 1.50 per pound 1 pound is 16 ounces so to make 32 ounces times it by 2 16 times 2 is 32 you will also times 1.50$ times 2

7 0
2 years ago
Does anyone know the answer for both of these
ASHA 777 [7]
19 is 13 and 20 is 22
3 0
3 years ago
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