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Varvara68 [4.7K]
3 years ago
14

Solve for the unknown variable: -8m - 9 = 39

Mathematics
2 answers:
Lemur [1.5K]3 years ago
6 0

Answer:

m =-6

Step-by-step explanation:

To solve for the unknown variable, m, we have to get m by itself. Perform the opposite of what is being done to the equation.

-8m-9=39

9 is being subtracted from-8m, so add 9 to both sides. Addition is the opposite of subtraction.

-8m-9+9=39+9

-8m=39+9

-8m=48

-8 and m are being multiplied. Divide both sides by -8, because division is the opposite of multiplication

-8m/-8=48/-8

m=48/-8

m= -6

Blizzard [7]3 years ago
5 0
M= -6
....
....
...
...
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Suppose that a school has 20 classes: 16 with 25 students in each, three with 100 students in each, and one with 300 students, f
astraxan [27]

Answer

a)   y    |      p(y)

    25   |      0.8

   100   |     0.15

   300   |      0.05

E(y) = ∑ y . p(y)

E(y) = 25 × 0.8 + 100 × 0.15 + 300 × 0.05

E(y) = 50

average class size equal to E(y) = 50

b)  y    |      p(y)

    25   |     \dfrac{16\times 25}{1000}=0.4

   100   |     \dfrac{3\times 100}{1000}=0.3

   300   |      \dfrac{1\times 300}{1000}=0.3

E(y) = ∑ y . p(y)

E(y) = 25 × 0.4 + 100 × 0.3 + 300 × 0.3

E(y) = 130

average class size equal to E(y) = 130

c) Average Student in the class in a school = 50

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5 0
3 years ago
Evaluate<br> 4(x+5)(2+1)<br> (2+3)(2-3)<br> for x = 5.
zaharov [31]

Answer:

-600

Step-by-step explanation:

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2 years ago
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Step-by-step explanation:

The hypothesis of a conditional statement is the "if" part.  This means the hypothesis is "If a line is bisected."

The conclusion of a conditional statement is the "then" part.  This means the conclusion is "then it is cut into two equal parts."

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(3)-(2):
15x-24y-(15x+30y)=3-(-105)
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6 0
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Because of this, we need to add the progress of 20 minutes and 40 minutes. 1/5+2/5=3/5.
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