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vova2212 [387]
3 years ago
10

12 over 2 - (-4 1 over 2 =

Mathematics
1 answer:
irakobra [83]3 years ago
6 0

Answer:

26 1/2

or

26.5

Step-by-step explanation:

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Describe how to create an equivalent equation from an equation that has fractions or decimals. explain how to decide what number
Ivan

Answer:

for the fractions or decimals part, round it up then make your equation, just multiply properly, what I do is, if I have a question like 23x17, I do 23x7, then 23x1, then add it,

Step-by-step explanation:

7 0
3 years ago
Juan drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 8 hours. When Juan drove h
kolezko [41]

Answer:Juan live 384 miles from the mountains.

Step-by-step explanation:

Let x be the speed  of Juan for trip to the mountains

Time taken by Juan to reach the mountains=8 hours

then distance traveled by Juan for trip to mountain= speed × time=8x..........(1)

Time taken by Juan to reach the home= 6 hours

Speed increased by 16 miles per hour ∴ the resultant speed to reach the home by Juan =x+16

then distance traveled by Juan to reach the home =speed × time

= (x+16)6......................(2)

Now distance is same in both the case (1) and (2),we get

8x= (x+16)6

⇒8x=6x+96..............(by solving brackets)

⇒2x=96..............(subtracting 6x from both sides )

⇒x=48....................(dividing 2 from both sides)

Putting this value in (1) ,we get

Distance traveled by Juan for trip to mountain =8×48=384 miles.

∴ Juan live 384 miles from the mountains.


3 0
3 years ago
The half-life of carbon-14 is 5,730 years. Assuming you start with 100% of carbon-14, what is the expression for the percent, P(
vodomira [7]
The general expression would be:
P(t) =  (\frac{1}{2})^{ \frac{t}{5730} }
In an organism that is 20,000 years old (t = 20000), we would expect:
P(t) =  (\frac{1}{2} )^( \frac{20000}{5730} ) = 0.08898
This menas there would be around 8.898% of carbon-14 remaining in the organism.
8 0
3 years ago
What is the equation of a line that is parallel to the line y= x+2? (Sorry I forgot to add multiple choice the first time.)
scoundrel [369]

Answer:

The answer is D. y - x = 1

Step-by-step explanation:

cause they have the same slope

7 0
3 years ago
Read 2 more answers
Ali wants to create a bulletin board by cutting a rectangular piece of cork and wrapping the edges in ribbon. She decides the wi
Montano1993 [528]

Answer:

The answer is below

Step-by-step explanation:

She decides the width of the board should be atleast 35% of the length.

Solution:

Let x represent the length of the bulletin board and y be the width of the bulletin board. Since there is 100 inches available, hence:

Perimeter = 2(length + width)

100 = 2(x + y)

x + y = 50        

Also, since the width is 35% of the area, hence:

y = 35% of x

y = 0.35x

Since:

x + y = 50    

x + 0.35x = 50

1.35x = 50

x = 37.04

x ≅ 38 inches to the next whole number

x + y = 50

y = 50 - 38

y = 12 inches

The bulletin board is 38 inches by 12 inches

6 0
3 years ago
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