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3 years ago

12

X and Y together complete a task in 4 days, Y and Z together in 5 days. If they work independently, who will finish the work in

the least time? A. X B. Y C. Z D. Not enough information to decide

1 answer:

pav-90 [236]3 years ago

4 0

Answer:

c, Z

Step-by-step explanation:

x+y=4

<u>y+z=5</u>

y=4-x

4-x+z=5

<u>-</u><u>x</u><u>+</u><u>z</u><u>=</u><u>1</u>

z=1+x

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If f(x)= 3x+1 is reflect across the y-axis; what would the slope & y-intercept be? *

Elden [556K]

Answer: f(x) = -3x + 1

So the slope is -3 and the y-intercept is 1

Step-by-step explanation:

This is because it’s across the y-axis so the y-intercept doesn’t change. Because it’s a reflection the slope just becomes the opposite of what it originally was, so in this case it will be -3

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2 years ago

A man gained rs. 3000 by selling a mobile set allowing 15 % discount on the marked price the loss would be rs. 8000. Find the ma

irinina [24]

Answer:

Marked price is Rs. 53333.33 and the cost price is Rs. 42333.33.

Step-by-step explanation:

Let Rs. x and Rs. y are the cost price and marked price of the mobile set respectively.

Now, the man has a loss of Rs. 8000 after giving a 15% discount on the marked price.

Therefore, 15% of y is 8000 i.e. $8000 = \frac{y\times 15}{100}$

⇒ y = Rs. 53333.33

Now, the man gained Rs. 3000 by selling the mobile set allowing 15% discount on the marked price.

Therefore, the mobile set has the cost price = x = Rs. [(53333.33 - 8000) - 3000] = Rs. 42333.33 (Answer)

3 0

3 years ago

Which of the following is the sum of both solutions of the equation <img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2Bx-42%3D0"

AysviL [449]

Answer: $x=6$ or $x=-7$

Step-by-step explanation:

Step 1: Factor left side of equation: $(x-6)(x+7)=0$

Step 2: Set factors equal to 0: $x-6=0$ or $x+7=0$

Get your answer: $x=6$ or $x=-7$

5 0

3 years ago

A parachutist's speed during a free fall reaches 198 feet per second. What is this speed in meters per second? At this speed, ho

Archy [21]

First covert the feet to meters.

1 meter = 3.3 feet.

Divide the total number of feet by 3.3 to get total number of meters:

198 / 3.3 = 60 meters per second.

Multiply meters per second by 15 seconds:

60 x 15 = 900 meters in 15 seconds.

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3 years ago

Find an equation of a line containing the point (-6,3) and has slope<br> - 1/3

AfilCa [17]

Answer: y=-1/3x+1

Step-by-step explanation:

To find an equation that contains the given point and has the same slope, we can plug it into slope-intercept form to find the y-intercept.

3=-1/3(-6)+b [multiply]

3=2+b [subtract both sides by 2]

b=1

Now that we know the y-intercept, we know that the equation is y=-1/3x+1.

7 0

3 years ago