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3 years ago

Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

olganol [36]3 years ago

8 0

Answer:

B or D

Step-by-step explanation:

your x point with be really close to 0 but not quite zero while your y would be 3

OleMash [197]3 years ago

4 0

I think The answer is D

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Kyra exercises at a gym for 1 2/3 hours. she stretches,lifts weights, runs, and showers. kyra spends 1/4 hour stretching 1/3 hou

topjm [15]

Total time (1 2/3 hours) minus the time spent stretching (1/4 hour) minus the time spent showering (1/3 hour) equals the time spent running.

x= time spent running

x= 1 2/3 - (1/4 + 1/3)
change 1 2/3 to improper fraction
x= 5/3 - (1/4 + 1/3)
need to multiply by a common factor
3 and 4 go into 12 evenly
5/3= 20/12
1/4= 3/12
1/3= 4/12

x= 20/12 - (3/12 + 4/12)
x= 20/12 - 7/12
x= 13/12
change back to mixed fraction

x= 1 1/12 hours spent running

Hope this helps! :)

5 0

4 years ago

Write the equation of the circle with center (3, 2) and with (9, 3) being a point on the circle. A) (x − 3)2 + (y − 2)2 = 13 Eli

Alexus [3.1K]

Answer:

D) (x - 3)^2 + (y - 2)^2 = 37

Step-by-step explanation:

The equation of a circle with center (h, k) and radius r is

(x - h)^2 + (y - k)^2 = r^2

We are given the center (3, 2), so we have h = 3, and k = 2.

The equation is now:

(x - 3)^2 + (y - 2)^2 = r^2

We need to find the radius.

The radius of a circle is the distance from the center of the circle to any point on the circle. We know the center, (3, 2), and we know a point on the circle, (9, 3). We can use the distance formula to find the distance between the center and that point which is the radius of the circle.

d = sqrt[(x2 - x1)^2 + (y2 - y1)^2]

d = sqrt[(9 - 3)^2 + (3 - 2)^1]

d = sqrt(6^2 + 1^2)

d = sqrt(37)

Now that we have the radius, we apply it to the equation of the circle.

(x - 3)^2 + (y - 2)^2 = (sqrt(37))^2

(x - 3)^2 + (y - 2)^2 = 37

Answer: D) (x - 3)^2 + (y - 2)^2 = 37

3 0

4 years ago

A spherical balloon is inflating with helium at a rate of 6464piπ StartFraction ft cubed Over min EndFraction ft3 min. How fast

Dmitrij [34]

Answer:

the surface area will increase 16 feet per minute

Step-by-step explanation:

Allow me to revise your question for a better understanding.

<em>A spherical balloon is inflating with helium at a rate of 64π Start Fraction ft cubed Over min End Fraction ft3 min. How fast is the balloon's radius increasing at the instant the radius is 2 ft? How fast is the surface area increasing? </em>

My answer:

Given that:

$\dfrac{dV}{dt} = 64\pi \dfrac{\text{ ft}^3}{\text{min}}$ (1)

As we know that, the volume of a spherical balloon can be calculated by using the following formula:

$V = \dfrac{4}{3}\pi r^3$ where r is the radius

Substitute V into (1), we have:

$\dfrac{dV}{dt} = \dfrac{d}{dt}(\dfrac{4}{3}\pi r^3)\\\\\dfrac{dV}{dt} =4\pi r^2\dfrac{dr}{dt}$

In this situation, the instant radius is: 2f

So we have:

$64\pi = 4\pi (2)^2\dfrac{dr}{dt}\\\\\Rightarrow \dfrac{dr}{dt} = 4$

The radius of the balloon is increasing at a rate of 4 feet per minute

The the surface area has the formula as:

SA1 = 4π $r^{2}$

If the radius of the balloon is increasing at a rate of 4 feet per minute, so the

the surface area will increase 16 feet per minute because:

SA2 : 4π $(4r)^{2}$ = 16 (4π $r^{2}$ ) = 16 SA1

Hope it will find you well.

8 0

4 years ago

Malabar Middle School is raising money for a local charity. Their goal is to raise $500 by their holiday break. If they have 10

Oliga [24]

Answer:

Step-by-step explanation:

500 dollars ÷ 10 days = 50 dollars a day

5 0

3 years ago

If volume of cylinder is 900cm² with height of 20cm then diameter of cylinder is

zhuklara [117]

Hello!

Before finding the diameter, we need to know the formula for the volume of cylinder. The volume of cylinder is found by using this formula: V = πr²h. In this formula, r is the radius and h is the height.

Since we have the height and volume, we need to find the radius, and then we can find the diameter.

900 = πr²(20) (divide both sides by 20)

45 = πr² (divide both sides by π)

45/π = r² (take the square root of both sides)

r ≈ 3.784 | The radius of the cylinder is equal to about 3.784 centimeters.

To find the diameter, we need to multiply the radius by 2 because half a diameter is equal to the radius.

3.784 × 2 = 7.568 centimeters | This can be rounded to about 7.57 centimeters.

Therefore, the diameter of the cylinder is equal to about 7.57 centimeters.

5 0

4 years ago