All categories

2 years ago

please give me the steps to solve this, will mark brainlyest if leads to correct answer

Mathematics

1 answer:

ZanzabumX [31]2 years ago

3 0

Answer: The car will skid 200 miles

Step-by-step explanation:

The formula S= 7/2√2D

can be used to approximate the speed S, in miles per hour, of a car that has left skid marks of length D, in feet. To determine how far a car will skid at 70 mph, we will substitute 70 mph for S in the formula. It becomes

70 = 7/2√2D

We will take squares of both sides. This is to simplify the square root on the right had side of the equation. It becomes

70^2 = 7^2/2^2(√2D)^2

4900 = 49/4 × 2D

4900 = 49D/2

Cross multiplying,

49D = 2 × 4900 = 9800

D = 9800/49 = 200

You might be interested in

A bag contains 5 red marbles, 8 blue marbles and 6 green marbles. If three marbles are drawn out of the bag, what is the probabi

Gala2k [10]

70000000000 + 8818282828828

8 0

2 years ago

A triangle has the coordinates

kotegsom [21]

Answer:

Go on Mathify! It’s a free website that could help you with ur math homework and it’s a chat

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

A rope of length 18 feet is arranged in the shape of a sector of a circle with central angle O radians, as shown in the

creativ13 [48]

Answer:

$A(\theta)=\frac{162 \theta}{(\theta+2)^2}$

Step-by-step explanation:

The picture of the question in the attached figure

step 1

Let

r ---> the radius of the sector

s ---> the arc length of sector

Find the radius r

we know that

$2r+s=18$

$s=r \theta$

$2r+r \theta=18$

solve for r

$r=\frac{18}{2+\theta}$

step 2

Find the value of s

$s=r \theta$

substitute the value of r

$s=\frac{18}{2+\theta}\theta$

step 3

we know that

The area of complete circle is equal to

$A=\pi r^{2}$

The complete circle subtends a central angle of 2π radians

using proportion find the area of the sector by a central angle of angle theta

Let

A ---> the area of sector with central angle theta

$\frac{\pi r^{2} }{2\pi}=\frac{A}{\theta} \\\\A=\frac{r^2\theta}{2}$

substitute the value of r

$A=\frac{(\frac{18}{2+\theta})^2\theta}{2}$

$A=\frac{162 \theta}{(\theta+2)^2}$

Convert to function notation

$A(\theta)=\frac{162 \theta}{(\theta+2)^2}$

6 0

3 years ago

Is –22 + 9 positive or negative?

12345 [234]

Negative since the answer would be -13

7 0

3 years ago

Read 2 more answers

If the mesure of angle

NISA [10]

Answer:

where is the figure to denote angles??

5 0

2 years ago

Read 2 more answers

**please give me the steps to solve this, will mark brainlyest if leads to correct answer**

please give me the steps to solve this, will mark brainlyest if leads to correct answer