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Brilliant_brown [7]
3 years ago
6

Theresa bought a new desktop computer. One side of the desktop screen is 14 inches and the

Mathematics
1 answer:
vazorg [7]3 years ago
8 0

Answer:

23 inches

Step-by-step explanation:

assuming that the desktop screen is a rectangle, then it's diagonal will form two right triangles.

by the Pythagorean theorem

{a}^{2}  +  {b}^{2}  =  {c}^{2}  \\  a = 14 \: and \: b = 18 \\ c  = the \: hypoteneuse

then

{14}^{2}  +  {18}^{2}  =  {c}^{2}  \\ 196 + 324 =  {c}^{2}  \\ 520 =  {c}^{2}  \\  \sqrt{ {c}^{2} }  =  \sqrt{520}  \\ c   \: \: is \: a pprox. \:  \: 22.8 in \\ c \:  \: rounded \: is \: 23in

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Find the area of a rectangle with a width of 16 centimeters and a length of 55 centimeters
viva [34]

Answer:

The area of the rectangle is 880 cm

Step-by-step explanation:

Lenght = 55cm

Breadth/width=16cm

Area of rectangle= lenght×breadth

Area= 55×16

Area= 880

Hence, area of rectangle is 880cm

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5 0
3 years ago
A horses body temperature T, is considered to be normal if it is within at least 0.9 degrees Fahrenheit of 99.9 degrees Fahrenhe
geniusboy [140]
99.9+0.9=100.8 degrees fahrenheit
99.9-0.9+99 degrees fahrenheit

The temperature can be between 99 and 100.8 degrees Fahrenheit.
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3 years ago
Punkt p (1;2k+1) należy do wykresu funkcji f(x)=-4x2+7. Oblicz k
olga2289 [7]

Answer:

k = 1

Step-by-step explanation:

English Translation

Find k if the point P (-1, 2k + 1) belongs to the graph of the function f (x) = - 4x^2 + 7.

The function is given as

y = f(x) = -4x² + 7

and point (-1, 2k+1) lies on the graph.

This point means that, at x = -1, y = 2k+1

y = -4x² + 7

Substituting the values in

2k + 1 = -4(-1)² + 7

2k + 1 = -4 + 7 = 3

2k = 3 - 1

2k = 2

k = 1

Hence, the point (-1, 2k+1) is (-1, 3)

To check,

y = -4x² + 7

3 = -4(-1)² + 7

3 = -4 + 7

3 = 3

So, this is truly correct.

Hope this Helps!!!

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2 years ago
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Step-by-step explanation:

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7 0
2 years ago
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Ira Lisetskai [31]

Answer:5

Step-by-step explanation:

reverse the steps

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2(x+1)/3×3=4×3

2(x+1)/2=12/2

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x=6-1

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6 0
3 years ago
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