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Ghella [55]
2 years ago
8

What is the value of 4x-1/2y-12 when x=5 and y=20

Mathematics
1 answer:
Iteru [2.4K]2 years ago
7 0

Answer:

the answer is -2

Step-by-step explanation:

Since x=5 and y=20, plug those values into the correct variables in the equation of 4x-1/2y-12.

When we do that it brings us to:

4(5)-1/2(20)-12

Then we just simplify:

20-10-12

Simplify again:

10-12

So 10-12 is -2, therefore -2 is the answer

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18. 3(f+2) > 2f + 4\\3f + 6 > 2f + 4 \\3f-2f > 4-6\\f > -2\\ The answer is  I.

19. 4 < 6b -2 \leq 28\\4+2 < 6b \leq 28+2\\6 < 6b \leq 30\\6/6 < b \leq 30/6\\1 < b \leq 5

3 0
3 years ago
How do i do this? Its confusing
cestrela7 [59]

Answer:

$12,415.48

Step-by-step explanation:

A = P (1 + r/n)^(nt)

where A is the final amount,

P is the initial amount,

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n is the number of compoundings per year,

and t is the number of years.

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5 0
3 years ago
To solve the equation 5sin(2x)=3cosx, you should rewrite it as___.​
galina1969 [7]

Answer:

A

Step-by-step explanation:

We want to solve the equation:

5\sin(2x)=3\cos(x)

To do so, we can rewrite the equation.

Recall the double-angle for sine:

\sin(2x)=2\sin(x)\cos(x)

By substitution:

5\left(2\sin(x)\cos(x)\right)=3\cos(x)

Distribute:

10\sin(x)\cos(x)=3\cos(x)

We can subtract 3cos(x) from both sides:

10\sin(x)\cos(x)-3\cos(x)=0

And factor:

\cos(x)\left(10\sin(x)-3\right)=0

Hence, our answer is A.

*It is important to note that we should not divide both sides by cos(x) to acquire 10sin(x) = 3. This is because we need to find the values of x, and one or more may result in cos(x) = 0, and we cannot divide by 0. Hence, we should subtract and then factor.

5 0
2 years ago
Read 2 more answers
Ill give you a bouns of 50 points if you get these right. and brainlyest
charle [14.2K]

Answer:

what's the question? I don't see anything

8 0
2 years ago
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In a laboratory, the count of bacteria in a certain experiment was increasing at the rate of 2.5 % per hour find the bacteria at
Daniel [21]

9514 1404 393

Answer:

  5187

Step-by-step explanation:

At the end of 1 hour, the count is 2.5% greater than at the beginning.

  5060 + 2.5% × 5060 = 5060 +126.5 = 5186.5

The count at the end of the hour was about 5187.

4 0
2 years ago
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