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3 years ago

Use substitution to determine if the solution is correct (PINK HIGHLIGHTED ONE!!!)

Mathematics

2 answers:

mart [117]3 years ago

4 0

Answer:

It is not correct.

Step-by-step explanation:

If you plug 4 in for x, you get -2*4+5=13. This simplifies to: -8+5=13. This is an untrue statement since -8+5 is actually -3, not 13.

Hope this is helpful! :)

Sergio039 [100]3 years ago

3 0

Answer:

undefined

Step-by-step explanation:

So with the following equation,

-2x + 5 = 13

we plug in 4 for x

-2(4) + 5 = 13

-2 * 4 = -8

-8 + 5 = 13

-8 + 5

-3 = 13

-3 is not 13 so it is undefined

Thus,

the answer is undefined.

Hope this helps :)

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Enter your answer in the box. Be sure to enter your answer as an ordered pair (x,y). Meaning, put your answer in parenthesis.

vitfil [10]

Answer:

The solution of the system of equation are (10,15).

Step-by-step explanation:

The given two linear two variable equations are

- x - 2y = - 40 ........ (1) and

x + 4y = 70 .......... (2)

Now,adding thoes two equations (1) and (2) we get,

- 2y + 4y = - 40 + 70

⇒ 2y = 30

⇒ y = 15.

Now, putting y = 15 in the equation (2), we get,

x = 70 - 4y = 70 - 4(15) = 10

Therefore, the solution of the system of equation are (10,15). (Answer)

3 0

3 years ago

A rectangular shape of dimension 95m by 75m is drawn to a scale of 1cm to 10cm. find the area of the drawing

Dimas [21]

Answer:

p: (-4)2 > 0

r: Two angles, whose measure have a sum of 90, are supplements.

Step-by-step explanation:

4 0

3 years ago

A line with a slope of 2 passes through (3,9). Which choice is an equation of this line?

Veronika [31]

Answer:

The answer to your question is number 3.

Step-by-step explanation:

Data

slope = m = 2

Point = (3, 9)

Process

1.- Write the equation of the line in the form point-slope

y - y1 = m(x - x1)

2.- Identify the values of x1 and y1

x1 = 3 y1 = 9

3.- Substitution

y - 9 = 2(x - 3)

4.- Simplify

y - 9 = 2x - 6

y = 2x - 6 + 9

5.- Result

y = 2x + 3 slope y-intercept form

6 0

3 years ago

Does the following table shows a proportional relationship between the variables g & h

KATRIN_1 [288]

*the table being referred to is attached below

Answer:

The table does not show a proportional relationship between variable g and h.

Step-by-step explanation:

For a proportional relationship to exist between two variables, there must be a constant, of which serves like a unit rate, when comparing two variables.

Thus, in the table attached below, there is no obvious constant of proportionality between variable g and variable h.

Thus, $\frac{9}{3}$ ≠ $\frac{36}{6}$ ≠ $\frac{81}{9}$

4 0

3 years ago

Read 2 more answers

8x · 1 = 8x

koban [17]

Answer:

Hi there!

Your answer is:

B. Identity property

Step-by-step explanation:

The multiplicative identity property of 1, any number multiplied by 1, gives the same result as the number itself. It is also called the Identity property of multiplication, because the identity of the number remains the same

Hope this helps!

4 0

3 years ago