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sladkih [1.3K]
2 years ago
15

an electric can opener is worth 38 dollars when it is new. After each year it is worth half what it was the previous year. What

will it's worth be after 4 years?
Mathematics
1 answer:
BigorU [14]2 years ago
7 0
1 Year: 19
2 Years: 9.50
3 Years: 4.75
4 Years: 2.38 (2.375, but rounded)
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Please answer the attached question by selecting of the the given answers.
Alchen [17]

Answer:

The correct answer is option A. Base = 11 cm and height = 13 cm

Step-by-step explanation:

It is given that, height of a triangle is 2 cm more than its base.Then height is increased by 2 cm.Then the area of triangle becomes 82.5 cm²

<u>To find the base an d height of original triangle</u>

Let x be the original base 'b' then the height  h = x + 2

New height h = x + 2 + 2 = x + 4

Area = bh/2

82.5= (x(x + 4)/2

165 = x² + 4x

x + 4x - 165 = 0

Solving we get x = 11 and x = -15

Take positive value x = 11

Therefore base = 11 and height = x + 2 = 13 cm

The correct answer is option A. Base = 11 cm and height = 13 cm

5 0
3 years ago
Write a numerical expression for: twenty-seven less than the quotient of fourteen and seven.
cluponka [151]

Answer:

27⊂14=7

Step-by-step explanation:

8 0
3 years ago
The front of a storage bunker can be modeled by y=-5/216(x-72)(x+72), where x and y are measured in inches. The x axis represent
german
As far as I can make out this one.

the bunker is a 3D object, it has a height, with and length, however we're only concerned with the 2D front face, which has a length and width only.

we know the x-axis is the ground level, so the y-axis must be the scale for the length.

if we can find, using the provided model, the x-intercepts, namely where the x-axis gets touched, we can just get the distance between them and that's the ground level width.

keeping in mind that when the graph touches the x-axis, an x-intercept, "y" is 0.

\bf y=-\cfrac{5}{216}(x-72)(x+72)\implies \stackrel{y}{0}=-\cfrac{5}{216}(x-72)(x+72)&#10;\\\\\\&#10;0=\stackrel{\textit{difference of squares}}{(x-72)(x+72)}\implies 0=x^2-72^2\implies 72^2=x^2&#10;\\\\\\&#10;\pm\sqrt{72^2}=x\implies \pm 72=x

now, the distance from (-72, 0) and (72, 0) is just 72 +72, or 144.
3 0
2 years ago
Correct 7 to 2 decimal places
Zielflug [23.3K]

Answer:

7 to 2 decimal places is:

7 = 2.64

5 0
3 years ago
Read 2 more answers
the price of parking for 2 hours at the airport is $2.50 if the price is increased by 40% how much does it cost to park your car
Alexus [3.1K]

Answer: $3.50

Step-by-step explanation:

2.50x0.40=1

2.50+1

$3.50

5 0
3 years ago
Read 2 more answers
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