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Digiron [165]
4 years ago
15

A plank measures 4 and 3/4 feet. Elizabeth cuts off 2/5 of the plank. How long is the plank now?

Mathematics
1 answer:
Basile [38]4 years ago
8 0
4 3/4 - 2/5
Find a common denominator
4 15/20 - 8/20
Solve
4 7/20
The plank is 4 and 7/20 feet long now.
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For which values of a the system has at least one solution: x≤7 x≥a urgent pls help now
allochka39001 [22]

Answer:

We have the system:

x ≤ 7

x ≥ a

Now we want to find the possible values of a such that the system has, at least, one solution.

First, we should look at the value of a where the system has only one solution:

We can write the 2 sets as:

a ≤ x

x ≥ 7

So, writing both together:

a ≤ x ≤ 7

if a is larger than 7, we do not have solutions.

then a = 7 gives:

7 ≤ x ≤ 7

Here the only solution is 7.

Now, if a is smaller than 7, for example 5, we have:

5 ≤ x ≤ 7

Now x can take different values, so we have a lot of solutions.

Then the restrictions for a, such that the system has at least one solution, is:

a ≤ 7.

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4 years ago
Cuanto es 1357+5% explique como hiciste
Alecsey [184]

Answer:

Si estas pidiendo la respuesta a 1357 mas 5% de 1357 entonces la respuesta es 1,424.85.

Step-by-step explanation:

Para encontrar el % de cierto numero tienes que hagarar el numero como 5 y mover el decimal a la izquierda 2 veces entonces tendrias 0.05. Ahora multiplicas 0.05 por 1357 y tu respuesta seria 67.85. Y al final solo juntas 1357 y 67.85. Entonces 1357 + 67.85 = 1,424.85

8 0
3 years ago
Does anybody have the answer
Gwar [14]

Answer:

You're answer is right it is -2,2

Step-by-step explanation:

remember x comes before y

7 0
3 years ago
Plzzzz help right answer gets a brainly!
masha68 [24]

Answer: A, The line starts at 9 and ends at 29

5 0
3 years ago
Read 2 more answers
A navy submarine descended at a rate of 4 feet per second. a. Write the descent rate as an integer. b. Write an expression to fi
Rasek [7]

Answer:

1200

Step-by-step explanation:

Since the value they are asking for is in minutes, we need to convert seconds to minutes. We can do that by multiplying 4 and 60, because there are 60 seconds in a minute, and we need to find the value of one minute.  Also because the value they gave is 4. When we do this, we get 240. To get the final answer, we need to multiply 240 and 5, because 240 is the descending rate per minute, and they are asking for 5 minutes. When we do this, we get 1200.

(I might get this wrong, so like yeah.)

5 0
3 years ago
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