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3 years ago

In the following activity, match each pair of equivalent expressions.

Mathematics

1 answer:

Vilka [71]3 years ago

8 0

Answer:

1. -8+3x

2. 51x-2+4x2 (squared)

3. 66x +324

4. 6x+2

5. 13 +13x

Step-by-step explanation:

I don't think I really understand the question but I tried to simplify the equations

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What is the sign of a•(-b/b) when a = 0 and b <0

Art [367]

Answer:

zero

Step-by-step explanation:

Here, we want to get the sign of the expression

since a is zero, it multiplies any value in the brackets to be zero too

zero is neither positive nor negative

What this mean is that we can only explicitly classify the sign as zero

8 0

3 years ago

What is an equation of the line that passes through the point ( − 5 , − 1 ) (−5,−1) and is parallel to the line 4 x − 5 y = 10 4

Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

The equation of a straight line is expressed in the slope intercept form as

y = mx + c

Where m represents the slope

c represents the intercept.

The given equation is

4x−5y = 10

5y = 4x - 10

y = 4x/5 - 2

Comparing with the slope intercept form,

The slope,m = 4/5

The line that is parallel to the given line passes through the point (- 5,- 1)

If two lines are parallel, it means that they have the same slope. Therefore, the slope of the line that is parallel to the given line is 4/5

To determine the intercept c, we will substitute m = 4/5, x = - 1 and x = - 5 into the slope intercept equation. It becomes

- 5 = 4/5 × - 1 + c

- 5 = - 4/5 + c

c = - 5 + 4/5 = (- 25 + 4)/5 = - 21/5

The equation becomes

y = 4x/5 - 21/5

3 0

3 years ago

F(x)=3x+4. Determine the value of F (X) when X equals -1

hammer [34]

ANSWER

The value of this function at x=-1 is 1

EXPLANATION

The given function is

$f(x) = 3x + 4$

We want to find the value of this function at x=-1.

We substitute x=-1 into the function to obtain:

$f( - 1) = 3( - 1)+ 4$

We multiply out to obtain:

$f( - 1) = - 3+ 4$

$f( - 1) = 1$

Therefore the value of this function at x=-1 is 1.

4 0

3 years ago

Read 2 more answers

Solve this system by elimination : -5x + 3z =8 x- 4y = 7 5y - 4z = -14 find the x , y and z using elimination

Mnenie [13.5K]

Answer

• x = –1

• y = –2

• z = 1

Explanation

Given the system:

$\begin{gathered} -5x+3z=8\text{, equation 1} \\ 5y-4z=-14,\text{ equation 2} \\ x-4y=7,\text{ equation 3} \end{gathered}$

We have to divide equation 1 over 5 and add it to equation 2:

$\begin{gathered} -(5x)+0y+3z=8 \\ x-4y+0z=7 \\ 0x+5y-4z=-14 \end{gathered}$ $\begin{gathered} \frac{-(5x)+0y+3z=8}{5} \\ x-4y+0z=7 \\ 0x+5y-4z=-14 \end{gathered}$ $\begin{gathered} -x+0y+\frac{3}{5}z=\frac{8}{5} \\ x-4y+0z=7 \\ 0x+5y-4z=-14 \end{gathered}$

Now, we have to add 1/5(equation 1) to equation 2: