Ask question

Ask question

All categories

2 years ago

7

Which expression gives the same result as shown problem?

1 answer:

sineoko [7]2 years ago

8 0

The first choice gives you the same result. The factor of 5 can be removed to the outside of the summation symbol.

$5\sum\limits_{i=0}^{4}{\left(\dfrac{1}{3}\right)^{i}}$

You might be interested in

Dana has 4 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the ra

Sedaia [141]

Answer:

2hrs 40 minutes

Step-by-step explanation:

The formula for distance is expressed as:

$d=st, s=speed, t=time$

#The time taken to run:

$d=st\\\\t=d/s\\\\t_r=d/8$

#The time taken to walk:

$d=st\\\\t=d/s\\\\t_w=d/2$

#Since the distances are the same:

$d_r=8t_r,d_w=2t_w\\\\8t_r=2t_w\\\\t_r+t_w=4->t_w=4-t_r\\\\\therefore8t_r=2(4-t_r)\\\\8t_r=8-2t_r\\\\t_r=1\frac{1}{3} \hrs\\\\t_w=4-1\frac{1}{3}=2\frac{2}{3}\ hrs$

Hence, Dana spends 2hrs 40 minutes walking back

8 0

3 years ago

Please help me solve my problem!!!

Vera_Pavlovna [14]

Answer:

The answer to this problem is True.

7 0

2 years ago

40 cm equals how many mm

Lilit [14]

Answer:

40 cm equals 400 millimeters

I hope this helps you

7 0

2 years ago

Read 2 more answers

Two trains leave stations 456 miles apart at the same time and travel toward each other. One train travels at 105 miles per hour

love history [14]

Answer:

let x=distance 105 mph train traveled

(456-x)=distance 85 mph train traveled

Travel time = distance/speed (equal in both directions)

x/105=(456-x)/85

85x=105*456-105x

190x=105*456

x=105*456/190=252 miles

travel time=252/105=2.4 hrs

ans:

The two trains will meet in 2.4 hrs

Step-by-step explanation:

there brainliest pls

6 0

2 years ago

What is the scale drawing?<br> What is the scale of the new drawing? Explain.

natulia [17]

6 = 18
—. ——
3. 9
This is for a
__

5 0

2 years ago

Read 2 more answers