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3 years ago

Solve this linear equation using substitution. (Please show work!) y = -x y= 3x - 4

Mathematics

2 answers:

Arturiano [62]3 years ago

6 0

Answer:Under↓↓↓

Step-by-step explanation:

-x=3x-4 (substitute -x for y)

-4x=-4 (Subtract 3x from both sides)

x=1 (Divide both sides by -4)

Since y=x then y=1

iris [78.8K]3 years ago

4 0

Answer:

X=1

Step-by-step explanation:

So if you look at the two y= equations, you'll see that you can make them equal two one another because they both equal y

Placing the -x in place of y for it to look like this; -x = 3x-4. Subtract the 3x to the other side to get -4x =-4. Then divide the 4 from the x to isolate it and you get x=1!

Hope that helps!

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If each of the following represents the slope of a line (or line segment), give the slope a line that is perpendicular to it. (a

Crank

Answer:

$m_2 = -\frac{3}{4}$ -- (a)

$m_2 = -\frac{7}{3}$ -- (b)

$m_2 = -\frac{1}{4}$ --- (c)

$m_2 = -3$ -- (d)

Step-by-step explanation:

Given

$a.\ m = \frac{4}{3}$

$b.\ m = \frac{3}{7}$

$c.\ m = 4$

$d.\ m = \frac{1}{3}$

Required

Determine the slope of a perpendicular line

In geometry, the condition for perpendicularity is:

$m_2 = -\frac{1}{m}$

This formula will be applied in solving these questions.

$a.\ m = \frac{4}{3}$

$m_2 = -\frac{1}{m}$

Substitute 4/3 for m

$m_2 = -\frac{1}{4/3}$

Express as a proper division

$m_2 = -1/ \frac{4}{3}$

Convert to *

$m_2 = -1* \frac{3}{4}$

$m_2 = -\frac{3}{4}$

$b.\ m = \frac{3}{7}$

$m_2 = -\frac{1}{m}$

Substitute 3/7 for m

$m_2 = -\frac{1}{3/7}$

Express as a proper division

$m_2 = -1/ \frac{3}{7}$

Convert to *

$m_2 = -1* \frac{7}{3}$

$m_2 = -\frac{7}{3}$

$c.\ m = 4$

$m_2 = -\frac{1}{m}$

Substitute 4 for m

$m_2 = -\frac{1}{4}$

$d.\ m = \frac{1}{3}$

$m_2 = -\frac{1}{m}$

Substitute 1/3 for m

$m_2 = -\frac{1}{1/3}$

Express as a proper division

$m_2 = -1/ \frac{1}{3}$

Convert to *

$m_2 = -1* \frac{3}{1}$

$m_2 = -\frac{3}{1}$

$m_2 = -3$

4 0

3 years ago

3. The manager of a store marks up all the items by 10%. If x is the original price, which expression represents the new price w

goldenfox [79]

Answer:
1.1x
x + 0.1x

Step-by-step explanation:

The manager of a store marks up all items by 10%.

So, if the original price of any item is x, then increase for markup is 10% of x i.e. .
Hence, the expression that represents the new price with the markup is (x + 0.1x) = 1.1x.

7 0

3 years ago

Please help me with these three questions...<br>I will be really thankful for help

Karolina [17]

Answer:

1. Terminating

2. 60

3. I don't know

Step-by-step explanation:

7 0

3 years ago

Which subset of real numbers does the square root of 3 belong to

Tatiana [17]

Answer:

It is a Irrational Number.

Step-by-step explanation:

4 0

3 years ago

Help help please i will mark u brill

Roman55 [17]

Answer:

Step-by-step explanation:

u/4 + 9.9 = 16.9

Putting value of u = 24 in the equation

24/4 + 9.9 = 16.9

6 + 9.9 = 16.9

15.9 = 16.9

Bringing like terms on one

16.9 - 15.9 = 1

7 0

3 years ago

Read 2 more answers