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3 years ago

Need help to solve the maximum

Mathematics

1 answer:

Mekhanik [1.2K]3 years ago

6 0

Answer:

B. 1

Step-by-step explanation:

Your answer for A is correct.

The time it take for the sub to hit the water will be the time between when the submarine started to get lowered and when its distance from the water was zero.

The sub started to get lowered at x = 0.

Now we need to solve for the smallest positive zero of the function.

This function factors to (x - 1)(x - 7)

From this we can tell that the submarine is a water level for time x = 1 and x = 7.

The smallest of these is 1, so that is when the submarine first hit the water and 7 is when it came back out.

The sub started getting lowered at x = 0 and hit the water at x = 1 and because x is in seconds, it took 1 second for the sub to hit the water.

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Ajay bought a fan and a heater for rs 4000. He sold the fan at a profit of a 25% and the heater at a loss of 5%. If he gained 7%

Alborosie

Answer: Heater -Rs 2400; Fan- Rs 1600

Step-by-step explanation:

Given

Ajay bought a fan and a heater for Rs 4000

Suppose the price of fan is x and that of heater is 4000-x

Profit on the fan is $0.25x$

Loss on heater is $0.05\times (4000-x)$

Total profit is 7% i.e. $0.07\times 4000$

$\therefore 0.07\times 4000=0.25x-0.05(4000-x)\\\Rightarrow 280=0.25x-200+0.05x\\\Rightarrow 480=0.3x\\\Rightarrow x=1600$

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3 years ago

A line passes through the points (1, 3) and (3, -1) on a coordinate plane. What is the equation of this line in slope-intercept

FromTheMoon [43]

Answer:

y=[-2]x[+][5]

Step-by-step explanation:

$\frac{-1-3}{3-1}=\frac{-4}{2} =-2$ m= -2

Using the point (1,3) Find the value of b

3= -2(1)+b

3= -2+b

+2 +2

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5=b

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3 years ago

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James found a pair of shoes he wanted at two stores. At store A they are $35 and he had a 20% off coupon. At store B they were $

Oxana [17]

Answer: They cost the same amount.

Step-by-step explanation:

35(0.20)=7

35-7=28

40(0.30)=12

40-12=28

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The points at which pH = 0 and pH = 1 are indicated by the large red dots.

2. x = 0.5

When x = 0.5, pH ≈0.30. The point is indicated by the red diamond.

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This function has no y-intercept, because log(0) is undefined.

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3 years ago

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Mnenie [13.5K]

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Step-by-step explanation:

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3 years ago