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krok68 [10]
3 years ago
5

What does x equal in 6x + 9 = -12

Mathematics
2 answers:
Wewaii [24]3 years ago
6 0

Answer:

.    。    •   ゚  。   .

  .      .     。   。  

.   。      ඞ 。 .    •      

 ゚   -3.5 was the answer.  。 .

 '    1 Impostor remains     。

 ゚   .   . ,    .  .

Step-by-step explanation:

6x + 9 = -12

      -9    -9

6x = -21

Divide -21 by 6

x = -3.5

Hunter-Best [27]3 years ago
5 0
X would equal -3.5 or -7/2
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What is the equation of a line that passes through (7,8) and has a slope of -3
Komok [63]
It is helpful to first plug this in to point-slope form (note that there are other ways to do this).

Using the form y-y_1 = m(x-x_1), you get y-8=-3(x-7). You can simplify this to get y = -3x+29.

Answer choice A
3 0
3 years ago
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Which expressions are equivalent to 2 (a + 3b)?
VARVARA [1.3K]

Answer:

A & B

Step-by-step explanation:

A is spot-on because of the use of distributive property. B by the use of like terms.

8 0
3 years ago
if a number line plot starts from 2 (including the point) and extends towards positive infinity, the corresponding inequality is
murzikaleks [220]

Answer:

2 \leqslant y \leqslant  \infty

Step-by-step explanation:

y is equal to 2 and goes up to infinity

6 0
2 years ago
Evaluate the expression if r = 12 and t = -6.<br> (t-r)/3
Lynna [10]

Answer:

-6

Step-by-step explanation:

\frac{(t-r)}{3}

input the numbers

\frac{(-6-12)}{3}

do the problem in the parentheses first

-6-12 = -18

now it becomes

-\frac{18}{3}

simplify and you'll get

-6

this is because -18 ÷ 3 =

-6

4 0
3 years ago
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How do the values in Pascal’s triangle connect to the coefficients?
damaskus [11]

Explanation:

Each row in Pascal's triangle is a listing of the values of nCk = n!/(k!(n-k)!) for some fixed n and k in the range 0 to n. nCk is <em>the number of combinations of n things taken k at a time</em>.

If you consider what happens when you multiply out the product (a +b)^n, you can see where the coefficients nCk come from. For example, consider the cube ...

  (a +b)^3 = (a +b)(a +b)(a +b)

The highest-degree "a" term will be a^3, the result of multiplying together the first terms of each of the binomials.

The term a^b will have a coefficient that reflects the sum of all the ways you can get a^b by multiplying different combinations of the terms. Here they are ...

  • (a +_)(a +_)(_ +b) = a·a·b = a^2b
  • (a +_)(_ +b)(a +_) = a·b·a = a^2b
  • (_ +b)(a +_)(a +_) = b·a·a = a^2b

Adding these three products together gives 3a^2b, the second term of the expansion.

For this cubic, the third term of the expansion is the sum of the ways you can get ab^2. It is essentially what is shown above, but with "a" and "b" swapped. Hence, there are 3 combinations, and the total is 3ab^2.

Of course, there is only one way to get b^3.

So the expansion of the cube (a+b)^3 is ...

  (a +b)^3 = a^3 + 3a^2b +3ab^2 +b^3 . . . . . with coefficients 1, 3, 3, 1 matching the 4th row of Pascal's triangle.

__

In short, the values in Pascal's triangle are the values of the number of combinations of n things taken k at a time. The coefficients of a binomial expansion are also the number of combinations of n things taken k at a time. Each term of the expansion of (a+b)^n is of the form (nCk)·a^(n-k)·b^k for k =0 to n.

6 0
3 years ago
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