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3 years ago

Select two answer choioces

Mathematics

1 answer:

dexar [7]3 years ago

6 0

Answer:

C or 3rd option

Step-by-step explanation:

1/3 - 2/5

15/15 - 6/15

9/15

B is not correct

2/5 - 1/3

this will be a negative answer

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You have a wire that is 38 cm long. You wish to cut it into two pieces. One piece will be bent into the shape of a square. The o

Drupady [299]

Answer:16.71 cm

Step-by-step explanation:

Given

Length of wire L=38 cm

One piece is bent in the form of square and another in the form of circle

let x be the length of circle

therefore length of square side $\frac{38-x}{4}$

A=total area of square and circle

radius of circle $r=\frac{x}{2\pi }$

area of circle $A_c=\pi r^2=\pi \times (\frac{x}{2\pi })^2$

Area of square $A_s=(\frac{38-x}{4})^2$

$A=\pi \times (\frac{x}{2\pi })^2+(\frac{38-x}{4})^2$

To get the minimum value of A we get

$\frac{\mathrm{d} A}{\mathrm{d} x}=\frac{2x}{4\pi }-\frac{2(38-x)}{16}$

$\frac{\mathrm{d} A}{\mathrm{d} x}=0$

$\frac{x}{4\pi }=\frac{38-x}{16}$

$x=\frac{38\pi }{4+\pi }$

Therefore circumference of circle

$x=\frac{38\pi }{4+\pi }=\frac{119.396}{7.142}=16.717 cm$

8 0

2 years ago

Please help I’ll give 5 stars <br><br> What is a explication for linear relationship?

almond37 [142]

Step-by-step explanation:

A linear equation in two variables can be described as a linear relationship between x and y, that is, two variables in which the value of one of them (usually y) depends on the value of the other one (usually x). In this case, x is the independent variable, and y depends on it, so y is called the dependent variable

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3 years ago

One car traveled 220 miles and drove 10 mph hour slower than a second car which drove 260 miles. If the cars were traveling for

Colt1911 [192]

55 mph...if the 1st one drove 260 miles, that's 65mph for 4 hours...1st car has to be 55mph for 4 hours to get 220 miles.

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3 years ago

Help with 35 to 40, don’t know if I am right

Sedaia [141]

Step-by-step explanation:

35. 1000 m / 1 km = 10³

Move the decimal point 3 places to the right.

36. 100 cm / 1 m = 10²

Move the decimal point 2 places to the right.

37. 1 mm / 1000 μm = 10⁻³

Move the decimal point 3 places to the left.

38. 1 km / 1000 m × 1 m / 100 cm = 10⁻⁵

Move the decimal point 5 places to the left.

39. 1 Mm / 10⁶ m × 1 m / 10⁶ μm = 10⁻¹²

Move the decimal point 12 places to the left.

40. 100 cm / m × 1000 m / km = 10⁵

Move the decimal point 5 places to the right.

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3 years ago

Please help!!!! I need to get this right for a good grade!

Marina CMI [18]

The red one

Trust me hurry up ive played quizlet live before

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2 years ago