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Yakvenalex [24]
2 years ago
8

10 points + brainliest to first correect answer :) incorrect answers/ answers with no effort will be deleted this is easy im jus

t making sure :)
Which expressions are equivalent to 8 (-10x+3.5y-7)? Select two options.

Mathematics
1 answer:
kogti [31]2 years ago
7 0

Answer:

B. -80x + 28y - 56

D. 4(-20x + 7y - 14)

Step-by-step explanation:

8(-10x + 3.5y - 7)

= 8(-10x) + 8(3.5y) - 8(7)

= -80x + 28y - 56

= 4(-20x + 7y - 14)

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Determine whether LINE AB and LINE CD are parallel, perpendicular, or neither. A(−1, −4) , B(2, 11) , C(1, 1) , D(4, 10) ( write
Luba_88 [7]

Step-by-step explanation:

Hey there!

The points of line AB are; (-1,-4) and (2,11).

Note:

  • Use double point formula and simplify it to get two eqaution.
  • Use condition of parallel lines, perpendicular lines to know whether the lines are parallel or perpendicular or nothing.

~ Use double point formula.

(y - y1) =  \frac{y2 - y1}{x2 - x1} (x - x1)

~ Keep all values.

(y  + 4) =  \frac{11 + 4}{2 + 1} (x + 1)

~ Simplify it.

y + 4 =  \frac{15}{3} (x + 1)

y + 4 = 5x + 5

5x - y + 1 = 0

Therefore this is the equation of line AB.

Now, Finding the equation of line CD.

Given;

The points of line CD are; (1,1) and (4,10).

~ Using formula.

(y - y1) =  \frac{y2 - y1}{x2 - x1}(x - x1)

~ Keep all values.

(y - 1) =  \frac{10 - 1}{4 - 1} (x - 1)

~ Simplify it.

y - 1 = 3 x - 3

3x - y - 2 = 0

Therefore, 3x - y- 2 = 0 is the eqaution of line CD.

Use condition of parallel lines.

m1= m2

Slope of equation (i)

m1 =  \frac{ - coeff. \: of \: x}{coeff \: of \: y}

m1 =  \frac{ - 5}{ - 1}

Therefore, m1 = 5

Slope of second equation.

m2 =  \frac{ - coeff \: .of \: x}{coeff \: .of \: y}

m2 =   \frac{ - 3}{ - 1}

Therefore, m2 = 3.

Now, m1≠m2.

So, the lies are not parallel.

Check for perpendicular.

m1*m2= -1

3*5≠-1.

Therefore, they aren't perpendicular too.

So, they are neither.

<em><u>Hope </u></em><em><u>it</u></em><em><u> helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

6 0
3 years ago
Simplifying Radicals: √200. show work. please and thank you!
Tema [17]
Simplify Radicals of √200

Rewrite 200 as 10² *2

Factor 100 out of 200
√100(2)
Rewrite 100 as 10²
Pull terms out from under the radical.
10√2 

The result can be written in both exact and decimal forms.
Exact Form
10√2 is your Answer
Decimal Form
14.14213562....

3 0
4 years ago
Which statement correctly describes the graph of y = x + 7?
Stolb23 [73]

Answer:

see the explanation

The graph in the attached figure

Step-by-step explanation:

we have

y=x+7

This is the equation of a line in slope intercept form

y=mx+b

m=1\\b=7

therefore

The slope is positive

The y-intercept is the point (0,7)--->  (value of x when the value of y is equal to zero)

The x-intercept is the point (-7,0) --->  (value of y when the value of x is equal to zero)

To graph the line plot the intercepts and join the points

see the attached figure

6 0
3 years ago
1+9+10+7+3+4+6+5+5+2+8+0+10+12+8+9+1<br> What's the answer.
uranmaximum [27]

Answer:

The answer is 100.

8 0
4 years ago
Parallelogram efgh has been reflected across the x axis and then rotated 180 degrees around the origin. which of the following t
Arte-miy333 [17]
You are correct, it would be a reflection across the y-axis. I am great at visualizing but for those who are not (Not saying you) all they have to do is cut out a parallelogram and mimic the movements.

4 0
3 years ago
Read 2 more answers
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