3 years ago

I need help with these three questions

Mathematics

1 answer:

dusya [7]3 years ago

3 0

0.55 per pound
90 miles per day
16 oz for 3.19

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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

Rename the number 4 thousand 7 hundreds

Brrunno [24]

The number would be written numerically like so:

4,700

4 0

3 years ago

Read 2 more answers

You are looking at your power bill for the month, you pay 12 cents per kilowatt-hour. Your power bill came out to $76.49 how man

Rudiy27

I’m no mathematical but I think I can help you with that

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2 years ago

Refer to the picture, including the ratios. What is the theorem that allows you to state that triangle def ~ triangle ghj ?

Slav-nsk [51]

Answer:

It’s D

Step-by-step explanation:

Because you have two sides that are congruent and an angle giving you SAS

3 0

3 years ago

State the property that is demonstrated: (3)(8) = (8)(3).

bagirrra123 [75]

<span>(3)(8) = (8)(3)

answer is </span><span>A. Commutative</span>

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3 years ago