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3 years ago

Help plz dont know the answer

Mathematics

1 answer:

stealth61 [152]3 years ago

6 0

Answer is B

How I got is because I had to first figure out what 40 seconds worth of heartbeats are equal to. 80 - 48 is 32 divided by 2 is 16. Next, I added 48 and 16 which got me 64. All I had to do next was to add 80 and 16 because the rate of heartbeats per 10 seconds is 16. 80+16=96 and thats how I figured that the answer is B

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three families are traveling the same route across country. the first family stops every 240 kilometers. the second family stops

kogti [31]

Answer:

<u>The three families will stop at the same place at 1,200 kilometers.</u>

Step-by-step explanation:

1. Let's check all the information given to answer the question:

Family A or 1 stops every 240 kilometers

Family B or 2 stops every 200 kilometers

Family C or 3 stops every 300 kilometers

2. After how many kilometers will they stop at the same place?

Family A or 1 will stop at 240, 480, 720, 960 and 1,200 kilometers.

Family B or 2 will stop at 200, 400, 600, 800. 1,000 and 1,200 kilometers.

Family C or 3 will stop at 300, 600, 900. and 1,200 kilometers.

<u>As we can check the first common stop will be at 1,200 kilometers.</u>

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3 years ago

Ned has 55 marbles in his collection he has twice as many white marbles as red marbles he has five more blue marbles than white

nika2105 [10]

Answer:

7 marble's

Step-by-step explanation:

55 marbles and twice as many white marbles as red marbles and he has 5 more blue marbles than white marble's

4 0

2 years ago

Your plan was to be on the road by 9 A.M. but you did not leave the garage until 10 A.M. You then drove with the cruise control

Wittaler [7]

Answer:

The average speed over the time interval from 9 A.M. to noon was of 33.33 mph.

Step-by-step explanation:

The average speed is given by the following equation:

$v = \frac{d}{t}$

From 10A.M. to noon.

You traveled at 50mph during 2 hours. So how long you traveled?

$50 = \frac{d}{2}$

$d = 50*2$

$d = 100$

You traveled 100 miles.

What was your average speed over the time interval from 9 A.M. to noon

From 9 A.M. to 10 A.M, you did not travel.

From 10 P.M. to noon, 100 miles.

So 100 miles during 3 hours.

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The average speed over the time interval from 9 A.M. to noon was of 33.33 mph.

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3 years ago

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Elan Coil [88]

1) 2x-1 or x=1/2
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3 years ago

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Oksana_A [137]

Answer:

Step-by-step explanation:

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6 0

2 years ago