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choli [55]
3 years ago
9

To begin solving this system of linear equations by elimination , you can add the equations . x + 4y = 38 5x - 4y = -30 8x = 8 T

his step works because of the distributive property B. multiplication property of equality C. commutative property D. addition property of equality
Mathematics
1 answer:
PolarNik [594]3 years ago
6 0

Answer: D. Addition property of equality

Step-by-step explanation:

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Aliun [14]

Answer:

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Step-by-step explanation:

5 0
3 years ago
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What is the fifth term of the geometric sequence? 5, 15 , 45, ...
Virty [35]

The geometry sequence has the equation a(n)=5(3^{n-1}).

The 5 represents the first number of the sequence and the 3 represents the common ratio.

a(5) = 5(3^{5-1})=5(3^{4})=5(81)=405

answer: 405

6 0
3 years ago
Is ab perpendicular to cd ? Explain.
Afina-wow [57]
We know that
if two lines are perpendicular
then
the slopes 
m1*m2=-1

step 1
find the slope AB
A (0,2)
B (-3,-3)
m=(y2-y1)/(x2-x1)-----> m=(-3-2)/(-3-0)-----> m=-5/-3----> m1=5/3

step 2
find the slope CD
C (-4,1)
D (0,-2)
m=(y2-y1)/(x2-x1)-----> m=(-2-1)/(0+4)-----> m=--3/4----> m2=-3/4

step 3
multiply mi*m2
(5/3)*(-3/4)-----> -15/12
so
15/12 is not -1
therefore
 AB is not perpendicular to CD
4 0
3 years ago
6[4 x (5 + 4) – 3]<br> ITS TIMED
Damm [24]

Answer:

198

Step-by-step explanation:

Parentheses

Exponents

Multiply

Divide

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5 0
3 years ago
How can you represent the system of inequalities with a matrix? 11x-12y=7 5x+12y=-7
Ahat [919]

\left[\begin{array}{ccc}11&-12&7\\5&12&-7\end{array}\right]


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