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Anarel [89]
3 years ago
11

What is 8 - 4k = 40

Mathematics
2 answers:
kotegsom [21]3 years ago
5 0
Let's solve your equation step-by-step.<span><span>8−<span>4k</span></span>=40</span>Step 1: Simplify both sides of the equation.<span><span>8−<span>4k</span></span>=40</span><span><span><span>8+</span>−<span>4k</span></span>=40</span><span><span><span>−<span>4k</span></span>+8</span>=40</span>Step 2: Subtract 8 from both sides.<span><span><span><span>−<span>4k</span></span>+8</span>−8</span>=<span>40−8</span></span><span><span>−<span>4k</span></span>=32</span>Step 3: Divide both sides by -4.<span><span><span>−<span>4k</span></span><span>−4</span></span>=<span>32<span>−4</span></span></span><span>k=<span>−8</span></span>Answer:<span>k=<span>−<span>8



</span></span></span>
olya-2409 [2.1K]3 years ago
3 0
8-4k=40
-4k=32
k=-8 is the answer
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Evgesh-ka [11]

The proportion that could be used to solve for the variable is:

\frac{7}{1.68}=\frac{p}{2.88} ; p = 12 ⇒ b

Step-by-step explanation:

Direct proportion means that two (or more) quantities increase or decrease in the same ratio

  • y = k x is the equation of direct proportion, where k is the constant of proportionality
  • \frac{y_{1}}{x_{1}}=\frac{y_{2}}{x_{2}}=k is the another way to write a proportion

The number of pencils and the cost of them is increased together or decreased together

∴ The number of the pencils and their costs are in direct proportion

- By using the 2nd rule above

∵ The cost of the 7 pencils is $1.68

∵ The cost of p pencils is $2.88

∴ \frac{7}{1.68}=\frac{p}{2.88}

The proportion that could be used to solve for the variable is: \frac{7}{1.68}=\frac{p}{2.88}

∵ \frac{7}{1.68}=\frac{p}{2.88}

- By using cross multiplication

∴ p × 1.68 = 7 × 2.88

∴ 1.68 p = 20.16

- Divide both sides by 1.68

∴ p = 12

The value of variable p is 12

Learn more:

You can learn more about the proportion in brainly.com/question/10708697

#LearnwithBrainly

8 0
3 years ago
Help me im absotootley verytootley megatootely stoopid.
Whitepunk [10]

Answer:

The graphs are posted.

Step-by-step explanation:

the method to solve such inequalities is assume the line and then draw the line then search for the inequality

The y < 0.5x-3

First plot  the line y=0.5x-3

Now all the values of y which are below the line satisfies the inequality.

similarly for the second question x+y ≥ 5.

Now assume the line x+y=5

All the values of (x , y) above the line satisfies the equation including the points on the line .

3 0
3 years ago
Suppose P(E) = 81%; P(E and F) = 9%; and P(E or F) = 65%,
PIT_PIT [208]

Using Venn probabilities, it is found that P(F) = -0.07, which is not a probability, as it is a negative value.

------------------

  • We have two events, E and F.
  • Their probabilities are: P(E) = 0.81, P(E \cap F) = 0.09, P(E \cup F) = 0.65
  • The probabilities are related by the following equation:

P(E \cap F) = P(E) + P(F) - P(E \cup F)

  • Replacing into the equation, we can find P(F).

0.09 = 0.81 + P(F) - 0.65

0.16 + P(F) = 0.09

P(F) = -0.07

P(F) = -0.07, which is not a probability, as it is a negative value.

A similar problem is given at brainly.com/question/21421475

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2 years ago
Which is an example of the commutative property?
astra-53 [7]
A. <span>–13 + 27 = 27 + (–13) is an example of the commutative property.

The commutative property states that a + b = b + a.</span>
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3 years ago
Please help!! this is due TODAY!
Rzqust [24]
C I’m pretty sure that’s what is it
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