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Mashutka [201]
1 year ago
12

A customer buys three packets of cookies that

Mathematics
2 answers:
MArishka [77]1 year ago
7 0
11.43 hope you have a good day
shtirl [24]1 year ago
3 0
.55x3=1.65 then add 6.92+1.65=8.57 then 20-8.57=11.43 she receives $11.42 as change
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One student can paint a wall in 16 minutes. Another student can paint the same wall in 24 minutes. Working together, about how l
Mazyrski [523]
Let's look at work rates per minute.

Together they can paint the wall in x minutes.
Working together, in 1 minute, they do 1/x of the job.

The student who paints the wall in 16 minutes does 1/16 of the job in 1 minute.
The student who paints the wall in 24 minutes does 1/24 of the job in 1 minute.
Together, they do 1/16 + 1/24 of the job in 1 minute, but from above, we see that together, they do 1/x of the job in 1 minute, so 1/16 + 1/24 must equal 1/x. That gives us our equation.

1/16 + 1/24 = 1/x

1/16 * 3/3 + 1/24 * 2/2 = 1/x

3/48 + 2/48 = 1/x

5/48 = 1/x

x = 48/5 = 9.6

Answer: It takes them 9.6 minutes, or about 10 minutes to do the job together.


5 0
3 years ago
I need help with 8-13 I have 0 clue how to do it and I need to graduate soon
Darya [45]

Answer:-5

Step-by-step explanation:

4 0
2 years ago
The sum of the measures of the interior angles in a convex polygon is 1,260°. How many sides does the polygon have?
gavmur [86]
The formula for working out the total interior is:

180(n-2) = 1260

So let’s rearrange by dividing both sides by 180 and find what n is:

n-2 = 7

Then let’s add 2 to both sides to find what n is:

n=9

Each interior angle is 1260/9 = 140°.
The sum of the interior angle and its corresponding exterior angle is 180°.

Therefore, the polygon has 9 sides. :)

3 0
1 year ago
Xy = –16. What is the constant of variation for this relationship?
olganol [36]
Direct variation is y=kx and inverse variation is y=k/x, in this case:

y=-16/x

So this is an inverse variation with a constant of -16
6 0
3 years ago
An apartment cost $875 per month to rent the owner raises the price by 20% and then gives a discount of 8% to renters who signed
USPshnik [31]

Answer: $84

Step-by-step explanation: 20% of 875=175; 175+875=1050; 8% of 1050=84, so your final answer would be $84.

7 0
3 years ago
Read 2 more answers
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