MATHEMATICS HIGH SCHOOL

Lea and Marie are washing all the windows in their house. It would take Lea 80 minutes to wash the windows by herself, and it would take Marie 60 minutes to wash them by herself. Lea creates a table so she can find out how long it will take to wash the windows if they work together. What is the missing value in the table that represents the rate for Marie?

Answers

Answer 1
Answer: The missing value that represents the rate for Marie is 1/60. As mentioned in the table, rate (r) is the part (p) per minute (t). Let's check if it works for Lea. If p = 1/80t, then r = (1/80t)/t = 1/80 * t/t = 1/80 * 1 = 1/80. So, the formula works. Now, calculate the rate for Marie. If p = 1/60t, then r = (1/60t)/t = 1/60 * t/t = 1/60 * 1 = 1/60
Answer 2
Answer:

Answer:

it would be d 60t

Step-by-step explanation:

Lea and Marie are washing all the windows in their house. It would take Lea 80 minutes to wash the windows by herself, and it would take Marie 60 minutes to wash them by herself. Lea creates a table so she can find out how long it will take to wash the windows if they work together. What is the missing value in the table that represents the rate for Marie?

A table showing Rate in part per minute, Time in minutes, and Part of Windows Washed. The first row shows Lea, and has StartFraction 1 Over 80 EndFraction, t, and StartFraction 1 Over 80 EndFraction t. The second row shows Marie, question mark, t, and StartFraction 1 Over 60 EndFraction t.

so if she and her friend would be washing all of the windows in their house then their house is 60 cm and 60 in so the answer would be 60t

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Kevin can travel 22 1/2 miles in 1/3 hour. what is his average speed in miles per hour?

Answers

(22 (1)/(2) \ mi)/( (1)/(3) \ h)=((45)/(2) \ mi)/((1)/(3) \ h)=(45)/(2) * 3 \ (mi)/(h)=(135)/(2) \ (mi)/(h)=\boxed{67 (1)/(2) \ (mi)/(h)}

His average speed is 67.5 mph.

Answer:

The answer would be 67 and 1/2

Step-by-step explanation: I really hope this helps:)

Vector AB has an initial point (4,3) and terminal point (-5,1). Determine the coordinates of the terminal point of AC if AC = -2ABA. (-9,-2)
B. (18,4)
C. (22,7)
D. (-4,-3)

Answers

Let's assume

point C=(x,y)

we are given

A=(4,3)

B=(-5,1)

now, we can find vector AB

AB=(-5,1)-(4,3)

AB=(-9,-2)

now, we can find AC

AC=(x,y)-(4,3)

AC=((x-4) , (y-3))

now, we are given

AC=-2AB

now, we can plug values

and we get

((x-4) , (y-3))=-2(-9,-2)

((x-4) , (y-3))=(18,4)

now, we can equate them equal

and then we can solve for x and y

x-4=18

x=22

y-3=4

y=7

so, point C is (22,7).........Answer
(22,7) I Took the quiz and that the answer

Which is the angle measure represented by 7.5 rotations clockwise?

Answers

Answer:

-2700°


Step-by-step explanation:

  • 1 rotation is 360°, also
  • Counterclockwise angles are POSITIVE ANGLES & Clockwise angles are NEGATIVE ANGLES

7.5 rotations is 360*7.5=2700 degrees

and since it is clockwise, the angle is negative.


Hence, 7.5 rotations clockwise means -2700°
1 rotation equals 360 degrees.  1/2 of a rotation equals 360/2 = 180 degrees.  So, 7 times 360 degrees = 2520 degrees plus 180 degrees = 2700 degrees.

Write the equation of the line whose slope is m=−9 and y-intercept is (0,5) in Slope Intercept Form. Show all work below.

Answers

Y=mx+b is slope intercept form...
m=slope
b=y-intercept
Answer- y=-9+5

Answer:

y = -9x +5

Step-by-step explanation:

y = mx+b

x = what you multiply the slope by

b (y-int) = the y-intercept

y = y

2x-[4-3(2^5+18y)] simplify

Answers

2x-[4-3(2^5+18y)]\n\n=2x-[4-3(32+18y)]\n\n=2x-(4-96-54y)\n\n=2x-(-92-54y)\n\n=2x+92+54y
= 2x - [4 - (96 + 54y)]
= 2x - 4 + 96 + 54y
= 2x + 54y + 92

Please explain how i do this

Answers

You would set up a proportion here's an example "32 over 8 then 20 over X" then multiply 20 by 8 and divide by 32 and that would be "X"
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