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ki77a [65]
3 years ago
6

PLEASE HELP!!! (55 pts)

Mathematics
2 answers:
tia_tia [17]3 years ago
7 0

Answer:

D. 6.3 cm

Step-by-step explanation:

arc  length = r * theta

                theta must be in radians

  72 * pi/180  = 2/5 * pi


arc length = 5 * 2/5 * ip

arc length = 2 * pi

               = 6.283  cm

Sunny_sXe [5.5K]3 years ago
4 0

Answer:


D. 6.3 cm


......

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The sum of 5 times a larger number and twice a smaller is 5. The difference of 4 times the larger and the smaller number is 4. F
Gemiola [76]

Answer:

1 and 0

Step-by-step explanation:

Let's call the smaller number x and the larger number y.

This means 5y+2x=5.

Also, 4y-x=4.

This is a system of equations. There are two main ways two solve this.

Method 1: Substitution

5y+2x=5

4y-x=4

Solve for one of the variables, then substitute it back into one of the equations to solve for the other variable.

I will take 4y-x=4 and solve for x.

4y=4+x

x=4y-4

Then substitute for x in the other equation and solve for y.

5y+2x=5

5y+2(4y-4)=5

5y+8y-8=5

13y=13

y=1

Now we can go back to our equation for x and substitute for y.

x=4y-4

x=4(1)-4=0

y, the larger number, is 1 and

x, the smaller number, is 0

Method 2: Elimination

5y+2x=5

4y-x=4

Change the equations so that the coefficient of one of the variables in an equation is opposite the one in the other equation. Then add the equations and solve for each variable.

If I multiply both sides of the second equation, 4y-x=4, by 2, the coefficient of x will become -2. In the first equation, the coefficient is 2, so they will become opposites.

4y-x=4

becomes

8y-2x=8

Now we have 5y+2x=5 and 8y-2x=8.

Add the sides of both equations to cancel the x values.

5y+2x+8y-2x=5+8

13y=13

y=1

like last time, we can substitute for y in any of the original equations to get x.

5y+2x=5

5(1)+2x=5

5+2x=5

2x=0

x=0

y, the larger number, is 1 and

x, the smaller number, is 0

6 0
3 years ago
I need help please answer correctly
Bas_tet [7]

Answer:

AC

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
4. 7 + 14x<br> What does that mean
kotegsom [21]

7 + 14x means that a number x (x could be any real number) times 14 is added to 7.

So if x = 2:

7 + 14x = 7 + 14(2) = 28 + 7 = 35

Happy to help!

8 0
3 years ago
Read 2 more answers
PLEASE ANSWER ASAP FOR BRAINESLT!!!!!!!!!!!!!!!!!!
Ilia_Sergeevich [38]

Answer:

D

Step-by-step explanation:

Circumference = Pi * radius^2

The radius is half of the diameter, 23.

5 0
3 years ago
Read 2 more answers
What is 12X-4y = -8 written in slope-intercept form?
qwelly [4]

Answer:

y = 3x + 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c

Given

12x - 4y = - 8 ( subtract 12x from both sides )

- 4y = - 12x - 8 ( divide all terms by - 4 )

y = 3x + 2 ← in slope- intercept form

3 0
3 years ago
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