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2 months ago

Guest #3092

2 months ago

Both chances to success are 1/4. If you want the first AND the second to be successful, you have to multiply the chances, so the answer is

1/4 * 1/4 = 1/16

1/4 * 1/4 = 1/16

Question

David and Brad are competing in a 20-mile bicycle race. David rides 6.2 miles in 1/4 hour. Brad rides 11.9 miles in 1/2 hour. If both riders continue at the same average speed, who will finish first? Explain how you know.

Solution 1

First, you calculate David's and Brad's unit rate.Â

David:

6.2 mi./1/4 hr. = 6.2 m./15 minutesÂ

In an hour, there's 60 minutes. 60 divided by 4 is 15. So 1/4 of an hour is 15 minutes.

Brad:

11.9 mi./1/2 hr. = 11.9 mi./30 minutes

Once again, there's 60 minutes in an hour, so 1/2 of an hour is 30 minutes.

Okay, observing both of the unit rates, David's speed is just about half of Brad's speed. As a result, you multiply David's unit rate twice to get the same amount of time as Brad. It's easier to solve if you think about fractions since unit rates and fractions are just about the same. Now, multiply both the numerator and denominator by 2:

6.2 x 2 = 12.4, and 15 x 2 = 30

Now that you've multiplied them by two, David and Brad are now continuing at the same average speed.

David: 12.4 mi./30 min.

Brad: 11.9 mi./30 min.

David will finish the bicycle race first since he's gone farther than Brad.

I reallyÂ hope I helped! :) There are so many other ways to solve this, but here's one way that I know best. If I didn't help, I'm sorry. I tried. :(

David:

6.2 mi./1/4 hr. = 6.2 m./15 minutesÂ

In an hour, there's 60 minutes. 60 divided by 4 is 15. So 1/4 of an hour is 15 minutes.

Brad:

11.9 mi./1/2 hr. = 11.9 mi./30 minutes

Once again, there's 60 minutes in an hour, so 1/2 of an hour is 30 minutes.

Okay, observing both of the unit rates, David's speed is just about half of Brad's speed. As a result, you multiply David's unit rate twice to get the same amount of time as Brad. It's easier to solve if you think about fractions since unit rates and fractions are just about the same. Now, multiply both the numerator and denominator by 2:

6.2 x 2 = 12.4, and 15 x 2 = 30

Now that you've multiplied them by two, David and Brad are now continuing at the same average speed.

David: 12.4 mi./30 min.

Brad: 11.9 mi./30 min.

David will finish the bicycle race first since he's gone farther than Brad.

I reallyÂ hope I helped! :) There are so many other ways to solve this, but here's one way that I know best. If I didn't help, I'm sorry. I tried. :(

Question

Jika f(x-1)=2x+5 dan g1(x-2)=4x+2 maka (gâ€¢f)1(0)

Solution 1

G (x) = x + 1 (fog) (x) = x 2 + 3x + 1 â‡’ (fog) (x) = x 2 + 3x + 1 â‡’ f (g (x)) = x 2 + 3x + 1 â‡’ f (x + 1) = x 2 + 3x + 1 Eg x + 1 = p, then x = p - 1. â‡’ f (p) = (p - 1) 2 + 3 ( p - 1) + 1 â‡’ f (p) = p 2 - 2p + 1 + 3p - 3 + 1 â‡’ f (p) = p 2 Â + p - 1 So f (x) = x 2 Â + x - 1 - ->Â

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ANSWER IS :Â x 2 + x - 1Â

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ANSWER IS :Â x 2 + x - 1Â

Question

Dana measured the height of her bedroom wall to be 3 yards tall.which of these is closest to the equivalent measurement? 0.6 kilometers,3.5 meters,274.3 centimeters,or 7834.7 millimeters

Solution 1

274.3 centimeters is closest to the equivalent

Question

explain why in any triangle the difference of the lengths of any two sides cannot be greater that the length of the third side.

Solution 1

Becuase then the 3 lines woul dnot connect

if you draw any 1 line of legnth w

then lets say you draw a line of legnth w/2 and (2/w)-1

then you would have 2 lines that are too short to connect

try it yourself

basically lets say we have sides legnth 3,6,10

10-6 is more than 3

if you draw a line that is 10 legnth and try to draw 1 line at each end, one which is 3 legnth and the other which is 6 legnth, you cannnot connect the 3 and 6 line becuase they are 1 unit too short, if they were 1 unit longer, then the triangle would be a line

if you draw any 1 line of legnth w

then lets say you draw a line of legnth w/2 and (2/w)-1

then you would have 2 lines that are too short to connect

try it yourself

basically lets say we have sides legnth 3,6,10

10-6 is more than 3

if you draw a line that is 10 legnth and try to draw 1 line at each end, one which is 3 legnth and the other which is 6 legnth, you cannnot connect the 3 and 6 line becuase they are 1 unit too short, if they were 1 unit longer, then the triangle would be a line

Question

Two cyclists leave town at the same time on the same road going in Â the same direction. Cyclist a is going 6 miles per hour faster than cyclist b. After 8 hours, cyclist a has traveled three times the distance as cyclist b. Use the equation 24x= 8(x+6) to find how fast cyclist b was traveling.

Solution 1

**Answer:**

**3 mph**

**Step-by-step explanation:**

Two cyclists leave town at the same time on the same road going in Â the same direction.

Cyclist A is going 6 mph faster than cyclist B

Let speed of cyclist B be x mph

Speed of cyclist A be (x+6) mph

Both cyclist leave town at the same time and traveled 8 hours. Â

- Distance covered by cyclist A in 8 hours= 8(x+6)

- Distance covered by cyclist B in 8 hours= 8x

After 8 hours cyclist A has traveled 3 times the distance as cyclist B

Therefore, 8(x+6) = 3(8x)

8x + 48 = 24x

24x - 8x = 48

Â Â Â Â 16x = 48

Â Â Â Â Â x = 3 mph

**Hence, The speed of cyclist B was 3 mph**

Solution 2

24x=8x+48

16x=48

/16Â /16

**x=3**

16x=48

/16Â /16

Question

one of the congruent angles of an isosceles triangle measures 40 degrees. what measures do the other angles have?

Solution 1

Isosolese triangle has 2 equal angles

3 interior angles of a triangle add upt o 180 so

since 1 of the 2 identical angles are 40 then

40+40+x=180

80+x=180

subtract 80

x=100

the ohter angle is 100

the answer is

angles=40,40,100

3 interior angles of a triangle add upt o 180 so

since 1 of the 2 identical angles are 40 then

40+40+x=180

80+x=180

subtract 80

x=100

the ohter angle is 100

the answer is

angles=40,40,100

Question

A professional basketball team must play a total of 85 came before the playoffs begin. The team has played 3/5 of the scheduled games, if the team plays 10 more games, what is the total number of games they will have played

Solution 1

They will have played a total number of 61 games.

85*3/5 is 51 and then 51+10=61.

85*3/5 is 51 and then 51+10=61.

Question

What is

Solution 1

Reason/Explanation:

Step 1:

Turn 3 into a fraction.

3/1

Step 2:

Multiply across

8 * 3 = 24

2 * 1 = 2

Answer: 24/2

Step 3:

Simplify

24 divided by 2 = 12

Answer = 12

-DustinBR

Question

What is the simplified version of square root 100x^36? A. 10x^18
B. 10x^6
C. 50x^18
D. 50x^6

Solution 1

Answer:

Nah itâ€™s actually a their wrong

Step-by-step explanation:

Solution 2

Your answer will be C because you just divide by 2

Question

The ratio of boys to girls at a day care center is 5 to 4. which of the following cannot be the total number of children at the center? (A) 27 children (B) 54 children (C) 60 children (D) 72 children please show work

Solution 1

C: 60 children because 60 cannont go into 9 which is the amount of children in the first ratio

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