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svp [43]
3 years ago
5

Last year,alex earened a monthly salary of $250, and ben earned a monthly salary of $180. This year, each of them received a pay

increase of 25% this year, how much more did alex earn in one month then ben
Mathematics
1 answer:
Roman55 [17]3 years ago
7 0

Answer: Alex earned $87.5 more than Ben

Step-by-step explanation:

Last year,Alex earned a monthly salary of $250. This year, he received a pay increase of 25%. It means that the amount by which his pay was increased is

25/100 × 250 = 62.5

His new monthly salary would be

250 + 62.5 = $312.5

Last yearBen earned a monthly salary of $180. This year, he also received a pay increase of 25%. It means that the amount by which his pay was increased is

25/100 × 1800 = 45

His new monthly salary would be

180 + 45 = $225

The difference between the amount earned by Alex and Ben monthly is

312.5 - 225 = $87.5

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2 years ago
A ball thrown in the air has a height of y = - 16x² + 50x + 3 feet after x seconds. a) What are the units of measurement for the
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<h2>Answer:</h2>

(a) ft/s

(b) 1ft/s

<h2>Step-by-step explanation:</h2>

Given equation;

y = (- 16x² + 50x + 3)ft       -------------(i)

Where;

y is measured in feet(ft)

x is measured in seconds(s).

(a) The rate of change of y with respect to x is found by dividing the total change in y by the total change in x. i.e

Δy / Δx

Where;

Δy = y₂ - y₁  

Δx = x₂ - x₁

∴ Δy / Δx = \frac{y_2 - y_1}{x_2 - x_1}              --------------(ii)

Since y is measured in feet, Δy will also be measured in feet.

Also, since x is measured in seconds, Δx will also be measured in seconds.

Therefore, the rate of change of y with respect to x (Δy / Δx) will be measured in feet per second (ft/s)

(b) The rate of change of y between x  = 0 and x = 2 can be found by using equation (ii)

Where;

y₂ is the value of y at x = 2 found by substituting x = 2 into equation (i)

y₁ is the value of y at x = 0 found by substituting x = 0 into equation (i)

=> y₂ =  - 16(2)² + 50(2) + 3 = 39

=> y₁ =  - 16(1)² + 50(1) + 3 = 37

Now, substitute the values of y₂, y₁, x₂ and x₁  into equation (ii)

Δy / Δx = \frac{39 - 37}{2 - 0}  

Δy / Δx = \frac{2}{2}

Δy / Δx = 1

Therefore, the rate of change of y is 1 ft/s

 

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c-120

Step-by-step explanation:

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A ferry traveled 1/6 of the distance between two ports in
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First, we determine the speed of the ferry by dividing the distance by the time it took to cover that certain distance.

speed = (1/6) / (3/7)

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Then, the distance it will travel for an hour is calculated through the procedure below.

distance = (7/18hour) x (1 hour)

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Therefore, after an hour, the ferry will be able to travel 7/18 of the distance between two ports.

7 0
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