3 years ago

Evaluate \dfrac{e}{4}+2f-3

Mathematics

1 answer:

Igoryamba3 years ago

8 0

Answer:

The value of given expression is 1.

Step-by-step explanation:

Consider the given expression is

$\dfrac{e}{4}+2f-3$

When e=12 and $f=\dfrac{1}{2}$ .

Substitute e=12 and $f=\dfrac{1}{2}$ in the given expression.

$\dfrac{12}{4}+2(\dfrac{1}{2})-3$

On simplification we get

$3+1-3$

$1$

Therefore, the value of given expression is 1.

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scoundrel [369]

Answer:

Step-by-step explanation:

We take a look at this expression: $49x^2-9$ and notice that both terms are square numbers. $49x^2=(7x)^2$ and $9=3^2$ .

There is a specific formula that I highly recommend you memorize involving differences of squares. It states that given the difference of squares $a^2-b^2$ , it can always be factored into $(a+b)(a-b)$ .

Here, we can apply that. In this case, a = 7x and b = 3. So:

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Thus, the answer is A.

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Try this option:

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Help me please!!!!!!

fomenos

Area of semicircle: pi * r^2/2
r = 9/2 = 4.5
3.14 * 4.5^2 = 63.585/2 = 31.7925
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Make it a rectangle: L * W
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