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Mathematics

1 answer:

Arisa [49]3 years ago

8 0

Answer: 63

Step-by-step explanation:

If she made a goal score of 33 and the ratio of goals and misses is 11:10 that means the answer is 30 because the actual amount of goals is 3 times the amount on the ratio. So you would just have to multiply it by 3.

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Alik [6]

The correct answer is that Hector placed Puppy 3 at -3.4 instead of at -0.75.
So A would be your correct answer. -3/4 is equivalent to -0.75. Think of it like money. 4 quarters equals $1.00. 3 quarters is 75 cents, or .75 which is this. Don’t forget the signs though. God bless you.

4 0

2 years ago

Read 2 more answers

a motorboat travels 305km in 5 hours going upstream and 651km in 7 hours going downstream. What is the rate of the boat in still

Ghella [55]

Recall your d = rt, distance = rate * time.

b = speed rate of the boat.

c = speed rate of the current.

keeping in mind that, as the boat goes Upstream, against the current, it's speed is not "b", but is really " b - c ", because the current is subtracting speed from it.

likewise, when the boat is going Downstream, because is going with the current, is really going faster at " b + c ".

$\bf \begin{array}{lccclll}
&\stackrel{km}{distance}&\stackrel{kmh}{rate}&\stackrel{hours}{time}\\
&------&------&------\\
Upstream&305&b-c&5\\
Downstream&651&b+c&7
\end{array}
\\\\\\
\begin{cases}
305=(b-c)(5)\implies 61=b-c\implies 61+c=\boxed{b}\\
651=(b+c)(7)\implies 93=b+c\\
----------------------\\
93=\boxed{61+c}+c
\end{cases}
\\\\\\
93=61+2c\implies 32=2c\implies \cfrac{32}{2}=c\implies 16=c$

what is the speed of the boat? well, 61 + c = b.

6 0

3 years ago

There are 20 students in your class. 35 of them pack a lunch.

bezimeni [28]

That doesn’t make sense. Did you mean 15?

6 0

2 years ago

The polynomial −2x3 − x2 + 13x in the last line is the result of

Marina86 [1]

Subtracting 3x^4+9x^3+3x^2 from the divided and bringing down 13x.

8 0

3 years ago