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4 years ago

PLEASE HELP MEEEE THANK YOUUU

Mathematics

2 answers:

Nesterboy [21]4 years ago

7 0

To calculate the area of a circle, use the equation a=pir^2 or area=3.14*radius squared

Insert the known values. We need to find the radius of the circle. Since the radius is half of the diameter, divide the diameter by 2 to get the radius.

The diameter is 20.

20/2=10

Area=3.14*10 squared

Area=3.14*100

Area=314 cm

Hope this helps!

bogdanovich [222]4 years ago

3 0

The formula for area of a circle is A = π r^2.

The diameter of this circle is 20. The radius is half the diameter so the radius is 10.

You substitute 10 for r in the formula to get A = π(10)^2. 10 to the second power is 10 times 10 which is 100 so you get A= π(100). When you multiply π by 100, you get 314.15 which rounded to the nearest tenth is 314.5.

The area of the circle is 314.5 squared centimeters.

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Question 2 of 10

Jet001 [13]

Given:

The parent function is:

$f(x)=x^2$

This function shift 1 unit left, vertically stretch by a factor of 3 and reflected over the x-axis.

To find:

The function after the given transformations.

Step-by-step explanation:

The transformation is defined as

$g(x)=kf(x+a)+b$ ... (i)

Where, k is stretch factor, a is horizontal shift and b is vertical shift.

If k<0, then the graph of f(x) is reflected over the x-axis.

If 0<|k|<1, then the graph compressed vertically by factor |k| and if |k|>1, then the graph stretch vertically by factor |k|.

If a>0, then the graph shifts a units left and if a<0, then the graph shifts a units right.

If b>0, then the graph shifts b units up and if b<0, then the graph shifts b units down.

It is given that the graph of f(x) shifts 1 unit left, so a=1.

The graph of f(x) vertically stretch by a factor of 3, so |k|=3.

The graph of f(x) reflected over the x-axis, so k=-3.

There is no vertical shift, so b=0.

Putting $a=1,k=-3,b=0$ in (i), we get

$g(x)=-3f(x+1)+0$

$g(x)=-3f(x+1)$

$g(x)=-3(x+1)^2$ $[\because f(x)=x^2]$

Therefore, the correct option is B.

5 0

3 years ago

Write some thing good in answer.

denis23 [38]

Answer:

You’re awesome.

5 0

3 years ago

Read 2 more answers

Given that ∆MTW ≅ ∆CAD, which angles are corresponding parts of the congruent triangles? ∠T ≅ ∠C ∠T ≅ ∠A ∠T ≅ ∠D

Tasya [4]

Answer:

∠T ≅ ∠A

Step-by-step explanation:

Since, ∆MTW ≅ ∆CAD

Therefore, ∠T ≅ ∠A (cpct)

8 0

4 years ago

14+14p=21 solve for p

11Alexandr11 [23.1K]

Answer: 0.5

Step-by-step explanation: In this problem, we're asked to solve the following equation for p. Let's first switch 14 and 14p around so we have 14p + 14 = 21.

To solve this equation for p, we must first isolate the term containing p which in this case is 14p.

Since 14 is being added to 14p, we need to subtract 14 from both sides of the equation.

14p + 14 = 21

-14 -14

On the left side of the equation, the positive 14 and negative 14 cancel each other out and we have 14p. On the right side of the equation, we hav 21 - 14 which gives us 7.

Now we have the equation 14p = 7.

Since p is being multiplied by 14, to get p by itself, we divide both sides of the equation by 14.

On the left side of the equation the 14's cancel and we are left with p. On the right side of the equation, 7 divided by 14 is 0.5 which is our answer.

Therefore, p = 0.5 which is the solution for our equation.

Remember, you can always check your solution by substituting a number in for a variable to make sure the equation is true.

6 0

3 years ago

In one month, the median home price in the west fell from $203,400 to $192,300. Find the percent decrease

Nostrana [21]

Around 5.4572271...% decrease
(i’m not sure what to round it to)

subtract 192,300 from 203,400 to find the amount of change
(= 11,100)

then divide that amount from the original price (203,400)

then multiply that number by 100 to get a percent

finally round to a reasonable percent

7 0

4 years ago

Read 2 more answers