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harkovskaia [24]
3 years ago
13

What is a possible first step in solving the equation? -4k + 9 = -k - 3

Mathematics
2 answers:
fomenos3 years ago
3 0

Answer:

subtract 9 both sides -4 = -k -12 then ad 12 both sides  , 8 = -k

Step-by-step explanation:

Bezzdna [24]3 years ago
3 0

Answer:

k = 4

Step-by-step explanation:

                              Possible first steps:

-4k + 9 = -k - 3

 +k          +k           add k to both sides

                                          OR

-4k + 9 = -k - 3

       - 9        - 9      subtract 9 from both sides

(LTLNTR a.k.a letters to left, numbers to right)

Hope this helps :)

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8 1/3% of 72 plz help im stuck
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Answer: 8 1/3 x 72 = 6

Step-by-step explanation:

8 1/3 x 72 = 6

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The scatter plot below shows a linear association. Which is the best linear model for the data?
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Step-by-step explanation:

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HELPPP
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Answer:

HL (Hypotenuse Leg)

Step-by-step explanation:

You have BC=CD (Because of reflexive property), AC=DC, and measure of BAC is equal to the measure of BDC, which is 90 degrees. Since these triangles are right and they have a hypotenuse and a leg congruent, you can say that they are congruent because of HL.

4 0
3 years ago
A complex number is a number that can be written in the form a + bi, where a and b are real numbers. In the complex number 4 + 2
IRISSAK [1]

Answer:

In the complex number 4 + 2i, 4 is the <em>real </em>part. In the complex number 4 + 2i, 2 is the <em>imaginary </em>part.

Step-by-step explanation:

The two parts of the complex number are called the <em>real</em> part and the <em>imaginary</em> part. The imaginary part is identified by its multiplier of <em>i</em>.

In the given number, the 2 is multiplied by i, so 2 is the imaginary part. The other part, 4, is the real part.

6 0
3 years ago
Read 2 more answers
A manager at a local company asked his employees how many times they had given blood in the last year. The results of the survey
Lubov Fominskaja [6]

Answer:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

Step-by-step explanation:

For this case we have the following distribution given:

X        0         1       2       3       4         5        6

P(X)  0.3   0.25   0.2   0.12   0.07   0.04   0.02

For this case we need to find first the expected value given by:

E(X) = \sum_{i=1}^n X_i P(X_I)

And replacing we got:

E(X)= 0*0.3 +1*0.25 +2*0.2 +3*0.12 +4*0.07+ 5*0.04 +6*0.02=1.61

Now we can find the second moment given by:

E(X^2) =\sum_{i=1}^n X^2_i P(X_i)

And replacing we got:

E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97

And the variance would be given by:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

 

8 0
4 years ago
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