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Dahasolnce [82]
3 years ago
14

Jana is training for a triathlon. If Jana biked at a constant rate, how many miles did she bike in the first 15 minutes?

Mathematics
1 answer:
Harman [31]3 years ago
7 0

In order to answer, I would first need to know Jana's speed, not that she biked at a constant rate.

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Why are halves a good choice for benchmark fractions for 1 1/3
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Answer and explanation:

Benchmark fractions are fractions that are used as references in measuring other fractions. They are easily estimated and so can be used in measuring more "specific" fractions such as 1/5, 7/9, 3/7, 1/3 etc. If I wanted to measure 1 1/3cm for instance using a calibrated ruler, having centimeter measurements, I would first find 1cm on the ruler and then find half of one centimeter. Seeing that half is bigger than 1/3 but close, I could then estimate 1/3 to be somewhere less than 1/2 but a bit close to it

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Sanjaya is making punch. He uses 1/3 c of pineapple juice for every 3/4 c of orange juice.How many cups of pineapple juice does
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Answer:

1/4

Step-by-step explanation:

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They are about 50 cents per plant!!
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3 years ago
A quantity b varies jointly with c and d and inversely with eWhen b is 18, c is 4, d is 9, and e is 6What is the constant of var
777dan777 [17]

Answer:

constant of variation = 3

Step-by-step explanation:

we know that b varies jointly with c and d

so:

b∝c∝d

and b varies inversely with e, so

b∝\frac{1}{e}

and i will call the constant of variation k, this way we can make an equation for b in the following form:

b=k\frac{cd}{e}

this satisfy that b varies jointly with c and d (if b increases, c and d also increase) and inversely with e (if b increases, e decreases)

we know that when b is 18, c is 4, d is 9, and e is 6:

b=18\\c=4\\d=9\\e=6

substituting this in our equation for b:

b=k\frac{cd}{e}\\ 18=k\frac{(4)(9)}{6}

and we solve operations and clear for the constant of variation k:

18=k\frac{36}{6}\\ 18=6k\\\frac{18}{6}=k\\ 3=k

the constant of variation is 3.

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3 years ago
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What is the surface area?
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