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Advocard [28]
3 years ago
12

2x + 3y = 23 -1(2x + y = 13

Mathematics
2 answers:
notsponge [240]3 years ago
6 0

Answer:

y= 9

x = -2

Step-by-step explanation:

Y= 9, X = -2 I use the simultaneous equation to solve it.

vivado [14]3 years ago
3 0

Answer:

2x +3y= 5xy

-1(2x+y= 2xy+-1 = -3xy

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What is the length of BC?
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Step-by-step explanation:

Since AC and AB are opposite equal angles AC=AB

2x-24=x-2

x=22

So BC=x=22

8 0
2 years ago
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An educator wants to determine whether a new curriculum significantly improves standardized test scores for fourth grade student
vesna_86 [32]

Answer:

Independent Sampling

Step-by-step explanation:

There are two scenarios for independent sampling .

Testing the mean we get the differences between samples from each population. When both samples are randomly  inferences about the populations. can get.

Independent sampling are sample that are selected randomly. Observation does not depend upon value.Many analysis assume that sample are independent.

In this statement 90 dash are divides into two groups Group 1 and Group 2 . Both are standardized that mean both are randomly selected. Means are observed. Observation doesn't depend upon value.  So this style of sampling is independent Sample.

5 0
3 years ago
What is the constant of proportionality, y/X
Daniel [21]

Answer:

Best answer would be 1/2. If that doesn't work then 0.5/1 would be the answer.

8 0
2 years ago
PLZ HELP!!!! A pair of equations is shown below: y = 6x − 4 y = 5x − 3 Part A: In your own words, explain how you can solve the
Goryan [66]

Answer:

Step-by-step explanation:

y = 6x − 4

y = 5x − 3

A: chose a value for x(input) and get the out put (y) because the equation already in the slope intercept mode:y=mx+b

x                   y=6x-4                  y=5x-3

1                    y=2                        y=2

2                    y=8                        y=7

0                     -4                            -3

slope  :

y=6x-4    slope is 6            y intercept(0,-4)

y=5x-3      slope is 5          y intercept (0,-3)

solution of the pair of equation is  the point of intersection :

6x-4=5x-3

6x-5x=-3+4

x=1   and y=6x-4   ⇒ y=6-4=2

<h2>(1,2)</h2>

6 0
3 years ago
Part A: An angle is two collinear rays with a common endpoint. Find an example that contradicts this definition. How would you c
nata0808 [166]

Angles are formed by intersection of non-collinear lines, rays and planes.

<u>Part A</u>

<u>1. Contradictory Example</u>

A contradictory example to the given definition is that:

When the rays are collinear; the rays do not form an angle, but they form a line

<u>2. A more accurate definition</u>

A more accurate definition is that:

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<u>Part B</u>

<u>Example of an undefined term</u>

Undefined terms do not have a formal definition; an example is the plane.

A plane pertains to angles because it determines the parameter to be measured.

Read more about angles and undefined terms at:

brainly.com/question/1402901

8 0
2 years ago
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