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Arturiano [62]
2 years ago
13

Please answer this I will give brainliest if you answer right first.

Mathematics
1 answer:
Vesnalui [34]2 years ago
3 0

Answer:

<u>k = 5; y = 5x</u>

Step-by-step explanation:

The constant of proportionality is the value of y/x. Picking a random value on the graph, such as (2, 10), we can substitute this into the formula for k = y/x. 10/2 = 5. This satisfies one portion of the answer. Now, if we take the value of x from the same point, (2, 10), which is 2, and multiply it by 5, as illustrated in y = 5x, we get 10 for y. This suits the equation as mentioned and we can check other points with the same process to ensure that this answer is correct.

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The speed of a stream is 2 mph. A boat travels 4 miles upstream in the same time it takes to travel 8 miles downstream. What is
Amanda [17]
4 = (r-2) t

8 = (r+2) t

4 = (r-2) * [8/(r+2)]

4 = (8r-16)/ (r+2)  . . .multiply by 2


4r + 8 = 8r - 16

4r = 24

r = 6

hope this helps
7 0
3 years ago
What is the piecewise-defined function that expresses the cost of the order, C(x), in terms of the number of photos ordered, x?
Murljashka [212]

Answer:

See below

Step-by-step explanation:

The values in the table change by $3.80 from one line to the next. Since each change from line to line changes in number of photos by 20, the average cost per photo is $3.80/20 = $0.19. There is apparently a $5.80 -3.80 = $2.00 shipping charge for numbers of photos in the range shown in the table.

Thus, the piecewise function has 3 pieces:

for x < 100: $2.00 + 0.19x

for x < 200: $4.50 + 0.17x

for x ≥ 200: $0.15x

This could be written as ...

C(x)=\left\{\begin{array}{rcl}\$2.00+0.19x&\text{for}&0\le x

8 0
3 years ago
Aysha got a dress that was on 20% off of the original price of $25.40. How much did she get the dress for?​
notka56 [123]

Answer:

20.32$

Step-by-step explanation:

25.40×.20 = 5.08

25.40- 5.08 = 20.32

so the answer would be 20.32$

3 0
3 years ago
-7(2-3x) help solve please
nadezda [96]

Answer:

-14+21x

Step-by-step explanation:

Distrubute

-7 times 2= -14

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4 0
3 years ago
Read 2 more answers
Csc0sin20-sec0=cos20sec0​
Mkey [24]

Answer:0

Step-by-step explanation:

(0)0.342-0=0.9397(0)

0=0

sin 20= 0.342

cos 20=0.9397

3 0
2 years ago
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