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Vilka [71]
3 years ago
11

(9x-12)-(5x-7) please explain it to me​

Mathematics
2 answers:
nexus9112 [7]3 years ago
8 0
Simplifying
(9x + -12) + -1(5x + -7) = 0

Reorder the terms:
(-12 + 9x) + -1(5x + -7) = 0

Remove parenthesis around (-12 + 9x)
-12 + 9x + -1(5x + -7) = 0

Reorder the terms:
-12 + 9x + -1(-7 + 5x) = 0
-12 + 9x + (-7 * -1 + 5x * -1) = 0
-12 + 9x + (7 + -5x) = 0

Reorder the terms:
-12 + 7 + 9x + -5x = 0

Combine like terms: -12 + 7 = -5
-5 + 9x + -5x = 0

Combine like terms: 9x + -5x = 4x
-5 + 4x = 0

Solving
-5 + 4x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '5' to each side of the equation.
-5 + 5 + 4x = 0 + 5

Combine like terms: -5 + 5 = 0
0 + 4x = 0 + 5
4x = 0 + 5

Combine like terms: 0 + 5 = 5
4x = 5

Divide each side by '4'.
x = 1.25

Simplifying
x = 1.25
Leto [7]3 years ago
7 0
Use the foil method
FIRST
OUTER
INNER
LAST
9x by 5x
9x by -7
-12 by 5x
-7 by -12
Then add and subtract like terms to get the answer.
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Is an estimate for the qoutient of a division problem involving decimals always sometimes or never less than the actual qoutient
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Well it actually is less than quotient because the number you're dividing by is always smaller than the quotient.
3 0
3 years ago
Please help 25 points
algol13

Answer:

(-1,5)

(3, 1/125)

Step-by-step explanation:

g(x) = (1/5) ^x

Lets check the points

(1,0)

0 = (1/5) ^1

0 = 1/5  False this is not on the graph

(-1,5)

5 = (1/5) ^ -1

Remember negative exponents flip the fraction inside the parentheses

5 = 5/1  True  this is on the graph

(3, 1/125)

1/125 = (1/5)^ 3

1/125 = 1^3/ 5^3

1/125 = 1/125  true  this is on the graph

(-2,1/25)

1/25 = (1/5) ^-2

Remember negative exponents flip the fraction inside the parentheses

1/25 = 5^2/1^2

1/25 = 25  false this is not on the graph

4 0
4 years ago
A company that manufactures toothpaste is studying five different package designs.Assuming that one design is just as likely to
otez555 [7]

Answer:

The selection probability to be assigned to each of the package designs is 0.20

Step-by-step explanation:

Firstly, we need to assume that one design is just as likely to be selected by a consumer as any other design

so the probability of selecting any of the design is same and that is 1/5 = 0.20

Thus, what we are trying to say is that each of the package designs have an equal selection probability of 0.20

6 0
4 years ago
Order the following sets of numbers from least to greatest 2.1 notation bar,-2.1,2 1/11,-2
boyakko [2]
least from greatest
-2.1, -2, 1/11, 2
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4 years ago
What is an equation of the line that passes through the point (-4,-6) and is
Bess [88]

Answer:

2x-y=6

2*(-4)-(-6)=6

-8+6=6

-2=6

8 0
3 years ago
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