MATHEMATICS MIDDLE SCHOOL

Given matrix Y = [4,8,-3,-6] and matrix Z = [-1,-2,7,2]. What is matrix X if 1/2(X+Z)=Y?

Answers

Answer 1

Answer:

Answer:

[9,14,-13,-14]

Step-by-step explanation:

if 1/2(X+Z)=Y

X+Z=2Y

X+Z=2([4,8,-3,-6])=[8,16,-6,-12]

X=2Y-Z

X=[8,16,-6,-12]-[-1,-2,7,2]=[9,14,-13,-14]

X=[9,14,-13,-14]

Answer 2

Answer:

Answer: [9,18,-13,-14]

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What is 2/3 of an hour

Answers

2/3 of an hour is 40 minutes

Since for x. show all steps and check your work

30+10x=70

Answers

x=4

Because when you add 3 and four it equals 7
First you multiply 10 x 4 and get the answer 40
So 30 + 40= 70

Hope this helps!

30 + 10x = 70
10x = 70 - 30
10x = 40
x = 40/10
x = 4

What is the slope of this graph?

A:-3
B:-1/3
C:1/3
D:3

Answers

The slope is -3. From the first point it goes up 3 and to the left 1, making it a -3 slope

What is one solution of the following system?{2y-2x=12}
{x^2+y^2=36}
A.)(-6,0)
B.)(-2,4)
C.)(0,-6)
D.)(4,-2)

Answers

Answer:

(-6, 0)

Step-by-step explanation:

Check out A): (-6,0). This satisfies 2y-2x=12: 2(0) - 2(-6) = 12, and also satisfies x^2+y^2=36: (-6)^2 + 0^2 = 36. (-6, 0) is therefore a solution of the given system.

I don really understand percentages can anyone please help

Answers

In mathematics, a percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%", or the abbreviations "pct.", "pct"; sometimes the abbreviation "pc" is also used. A percentage is a dimensionless number (pure number).

We need to find a fraction equivalent to 1/2? Which method should she use.