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3 years ago

-16 - x = -20 what the answer for x?

Mathematics

2 answers:

ryzh [129]3 years ago

7 0

Answer:

x=4

Step-by-step explanation:

To solve for x, we need to isolate it.

Start by adding 16 to each side to cancel out the -16:

-x=-4

-x is essentially -1 * x which can be written as -1x

-1x=-4

Divide both sides by -1 to isolate x

x=4

We can also plug this back into the equation to check:

-16-x=-20

-16-4=-20

-20=-20 --> correct!

MrRa [10]3 years ago

7 0

Answer:

-4

Step-by-step explanation:

you can look at the question and add by -4 plus if u do that with positive numbers it will be the same

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Launch Problem 1

zaharov [31]

He is incorrect. you first have to find the least common denominator and that is 6. so then you would have 3/6- 2/6. that would equal 1/6.

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3 years ago

Which statement is the correct interpretation of the inequality –5 > –6? (1 point)

lilavasa [31]

Answer: OPTION D.

Step-by-step explanation:

The symbol of the inequality ">" means "greater than". Then, -5 is greater than -6.

If a negative number -a is greater than other negative number -b , then the distance between -a and zero is shorter than the distance between -b and zero.

You can see in the number line attached that -5 is closer to 0 than -6. Therefore, -5 is located to the right of -6.

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3 years ago

PLEASE HELP ASAP! I don’t recall how to do this!

MakcuM [25]

Answer:

Step-by-step explanation:

For a. we start by dividing both sides by 200:

$(1.05)^x=1.885$

In order to solve for x, we have to get it out from its position of an exponent. Do that by taking the natural log of both sides:

$ln(1.05)^x=ln(1.885)$

Applying the power rule for logs lets us now bring down the x in front of the ln:

x * ln(1.05) = ln(1.885)

Now we can divide both sides by ln(1.05) to solve for x:

$x=\frac{ln(1.885)}{ln(1.05)}$

Do this on your calculator to find that

x = 12.99294297

For b. we will first apply the rule for "undoing" the addition of logs by multipllying:

$ln(x*x^2)=5$

Simplifying gives you

$ln(x^3)=5$

Applying the power rule allows us to bring down the 3 in front of the ln:

3 * ln(x) = 5

Now we can divide both sides by 3 to get

$ln(x)=\frac{5}{3}$

Take the inverse ln by raising each side to e:

$e^{ln(x)}=e^{\frac{5}{3}}$

The "e" and the ln on the left undo each other, leaving you with just x; and raising e to the power or 5/3 gives you that

x = 5.29449005

For c. begin by dividing both sides by 20 to get:

$\frac{1}{2}=e^{.1x}$

"Undo" that e by taking the ln of both sides:

$ln(.5)=ln(e^{.1x})$

When the ln and the e undo each other on the right you're left with just .1x; on the left we have, from our calculators:

-.6931471806 = .1x

x = -6.931471806

Question d. is a bit more complicated than the others. Begin by turning the base of 4 into a base of 2 so they are "like" in a sense:

$(2^2)^x-6(2)^x=-8$

Now we will bring over the -8 by adding:

$(2^2)^x-6(2)^x+8=0$

We can turn this into a quadratic of sorts and factor it, but we have to use a u substitution. Let's let $u=2^x$

When we do that, we can rewrite the polynomial as

$u^2-6u+8=0$

This factors very nicely into u = 4 and u = 2

But don't forget the substitution that we made earlier to make this easy to factor. Now we have to put it back in:

$2^x=4,2^x=2$

For the first solution, we will change the base of 4 into a 2 again like we did in the beginning:

$2^2=2^x$

Now that the bases are the same, we can say that

x = 2

For the second solution, we will raise the 2 on the right to a power of 1 to get:

$2^x=2^1$

Now that the bases are the same, we can say that

x = 1

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3 years ago

There are 5 4/5 cups of milk left in a carton . Write 5 4/5 as an improper fraction

Ludmilka [50]

You multiply 5 x5 =4 =29/5

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4 years ago

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maxonik [38]

Answer:

4(-8x+5)-(-33x-26)= x +46

Step-by-step explanation:

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3 years ago

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