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3 years ago

If 50 apples cost $25, then 75 apples would cost how much?

Mathematics

2 answers:

NikAS [45]3 years ago

4 0

Answer:

$37.5

Step-by-step explanation:

we can look at this problem using rates:

50=$25

25=$12.5

so we can add $12.5 to $25 because 50+25=75 so our answer, 12.5+25=37.5

$37.5

kvasek [131]3 years ago

3 0

Answer:

Step-by-step explanation:

Cost of 1apple = 25/50

Cost of 75 apples

$=\frac{25}{50}*75\\\\=\frac{1}{2}*75\\$

= $ 37.50

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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

4 years ago

How would I solve for x

Fed [463]

Answer:

x=10

Step-by-step explanation:

The 3 angles of a triangle add to 180

4x+60+80 = 180

Combine like terms

4x+140 =180

Subtract 140 from each side

4x+140-140=180-140

4x = 40

Divide by 4

4x/4 = 40/4

x = 10

5 0

4 years ago

Read 2 more answers

Which of the following equations represents a horizontal line? (A y=x) (B x=5) (C y=-12) (D y=-x+1)

boyakko [2]

The answer is (C y=-12) Due to the fact that the line would be on the y axis, below 12, straight across.

3 0

3 years ago

Find the missing value, answer and explain

Sonbull [250]

Answer:

-24

Step-by-step explanation:

to find the answer to this you must find out what would make the equation constant

everytime the x goes up by 3 the y goes down by 6

so every time the x goes up by 1 the y goes down by 2

you would subtract 5 * 2 (or 10) to -14

-14 - 10 = -24

8 0

2 years ago

12. What assumption might you be tempted to make about the graphs of y = x, y = x3 and y = x5 based on the values you found in t

ohaa [14]

Answer:

Sorry need the cred

Step-by-step explanation:

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3 years ago