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Lera25 [3.4K]
3 years ago
12

A race track is in the form of a ring whose inner circumference is 157 m and outer circumference is 314 m. Find the area of the

track.
Mathematics
1 answer:
ASHA 777 [7]3 years ago
3 0
49,298 is the answer
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Three students wrote expressions on their dry-erase boards.
OlgaM077 [116]

Answer:

Student 2 and Student 3

Step-by-step explanation:

Student 2

-(5r - 3s + 1)

= - 5r +3s - 1

Student 3

= - 5r +3s - 1

3 0
3 years ago
Please help asap! The numbers for the graph have to be whole! (Can’t be .5)
UkoKoshka [18]
Put the top point on the first point from the top and the other one on the first point from the bottom.

6 0
3 years ago
The parabola x = y² - 9 opens: <br> a.)up <br> b.)down<br> c.) right <br> d.)left
Zolol [24]

Answer:

Right side towards positive x axis

Step-by-step explanation:

Let us see the basic rule to find the orientation of parabolas.

1.  If power if x is 2 and y is 1 , the parabola opens up or down.

2. If the power of y is 2 and that of x is 1 , the parabola opens right or left.

3. If the coefficient of x^{2} in case 1 is negative it opens downward

4. If the coefficient of y^{2}  in case 2 is negative , it opens left towards negative x axis.

Hence our equation is

x=y^2-9

here is satisfies the case 2. hence it opens right or left . Also the coefficient of  

y^{2} is positive so it opens up to the right side , that is towards positive x axis.

7 0
3 years ago
What is an equation of the line that passes through the point (-4,3) and is
Tom [10]

Answer:

5x + 4y = - 8

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

4x - 5y = 20 ( subtract 4x from both sides )

- 5y = - 4x + 20 ( divide all terms by - 5 )

y = \frac{4}{5} x - 4 ← in slope- intercept form

with slope m = \frac{4}{5}

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{\frac{4}{5} } = - \frac{5}{4} , thus

y = - \frac{5}{4} x + c ← is the partial equation

To find c substitute (- 4, 3) into the partial equation

3 = 5 + c ⇒ c = 3 - 5 = - 2

y = - \frac{5}{4} x - 2 ← in slope- intercept form

Multiply through by 4

4y = - 5x - 8 ( add 5x to both sides )

5x + 4y = - 8 ← equation in standard form

3 0
3 years ago
Am what I’m writing is correct? I put 2+-2=0
atroni [7]

The diagram ends at -2

The equation would be 2-4 = -2

3 0
2 years ago
Read 2 more answers
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