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Keith_Richards [23]
4 years ago
10

Karlen started painting the walls at 10:45 am, and he said that he could complete the job at 5:25 pm. His father said that five-

eighths of that time was enough to paint the walls. However, when Karlen finished the job, they noticed that it actually took him 80% of an hour longer than the time predicted by the father. How much longer did Karlen predict it would take than the time it actually took him to complete the job (what part of an hour)?
Mathematics
1 answer:
Vika [28.1K]4 years ago
5 0

Answer:

idk

Step-by-step explanation:

im a dumby

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A segment in the complex plane has a midpoint at 3 – 2i. If one endpoint of the segment is at 7 + i, what is the other endpoint?
Sav [38]
Well, we know the midpoint is 3 - 2i.. well, skipping for a second the 'i', is just (3, - 2) then

one endpoint is at 7 + i, or 7 + 1i or , ( 7, 1)

let's say the other endpoint is at x,y

\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ 7}}\quad ,&{{ 1}})\quad 
%  (c,d)
&({{ x}}\quad ,&{{ y}})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)
\\\\\\
\left(\cfrac{{{ x}} + {{ 7}}}{2}\quad ,\quad \cfrac{{{ y}} + {{ 1}}}{2} \right)=(3,-2)\implies 
\begin{cases}
\frac{x+7}{2}=3\\
x+7=6\\
x=6-7\\
------\\
\frac{y+1}{2}=-2\\
y+1=-4\\
y=-4-1
\end{cases}

so, x = -1 and y = -5, that gives us ( -1, -5)   or   -1 - 5i on the imaginary grid
7 0
3 years ago
Read 2 more answers
What expression can be used to find the nth term in the sequence 5,7,9, 11,...?
Vesna [10]

Answer:

The required expression which can be used to find the nth term in the sequence is:

a_n=2n+3

Hence, the fourth option i.e. 2n+3 is the correct option.

Step-by-step explanation:

Given the sequence

5, 7, 9, 11,...

An arithmetic sequence has a constant difference 'd' and is defined by  

a_n=a_1+\left(n-1\right)d

computing the differences of all the adjacent terms

7-5=2,\:\quad \:9-7=2,\:\quad \:11-9=2

The difference between all the adjacent terms is the same and equal to

d = 2

So

  • a₁ = 5
  • d = 2

Thus, the nth term of the sequence is

a_n=a_1+\left(n-1\right)d

substitute a₁ = 5 and d = 2 in the sequence

a_n=2\left(n-1\right)+5

a_n=2n+3

Therefore, the required expression which can be used to find the nth term in the sequence is:

a_n=2n+3

Hence, the fourth option i.e. 2n+3 is the correct option.

6 0
3 years ago
The slope of the line in the graph is 4. Fill in the y intercept. Choose the correct equation in the form y = mx + b The y inter
nikitadnepr [17]

Answer:

\rm\implies y = 4x + 3

Step-by-step explanation:

<u>Given </u><u>:</u><u>-</u>

  • The slope of the line in the graph is 4.

And we need to find the equation of the line. On looking at the graph we see that , it cuts y axis at (0,3) .So the y Intercept of the equation is 3 .

<u>Slope</u><u> Intercept</u><u> Form</u><u> </u><u>:</u><u>-</u><u> </u>

\rm\implies y = mx + c

<u>Substituting</u><u> the</u><u> respective</u><u> values</u><u> </u><u>:</u><u>-</u><u> </u>

\rm\implies y = 4*x + 3 \\\\\rm\implies y = 4x + 3

<u>Hence</u><u> the</u><u> </u><u>equation</u><u> of</u><u> </u><u>line </u><u>is </u><u>y </u><u>=</u><u> </u><u>4</u><u>x</u><u> </u><u>+</u><u> </u><u>3 </u>

7 0
3 years ago
The original price of a bicycle was $375. Now it is on sale for $295. What percentage of the original price was the markdown?
fomenos
  • [ Difference In Price / Original Price ] × 100%
  • [ ( 375 - 295 ) / 375 ] × 100%
  • =[ 80 / 375 ] × 100%
  • ( 64 / 3 )%
  • 21.3 reciprocal %

Hope this helps you!

Have an amazing day :)

3 0
3 years ago
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Who knows how to problem solve this this problem?
aleksandr82 [10.1K]

Answer:

just do it by Pythagoras theoram

Step-by-step explanation:

because it is a right angle

3 0
3 years ago
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