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adoni [48]
3 years ago
12

Lea and Marie are washing all the windows in their house. It would take Lea 80 minutes to wash the windows by herself, and it wo

uld take Marie 60 minutes to wash them by herself. Lea creates a table so she can find out how long it will take to wash the windows if they work together. What is the missing value in the table that represents the rate for Marie?
Mathematics
2 answers:
balandron [24]3 years ago
6 0

The answer to your question is 1/60t just took the test

kvv77 [185]3 years ago
5 0
The rate of the windows washed would be the amount of windows per minute. so the missing value is the amount of windows that she has washed
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Murtha has decided to start a pebble collection. She collects one pebble the first day and two pebbles on the second day. On eac
Musya8 [376]

Answer:

78

Step-by-step explanation:

Given that:

First day (a) = 1

1 more pebble every subsequent day than the previous day

Tn = a + (n - 1)d

d = common difference ; difference between pebbles in two successive days = 1

n = nth day

At the end of the 12th day;

Tn = a + (n - 1)d

T(12) = 1 + (12 - 1) 1

T(12) = 1 + 11

T(12) = 12

Appling the sun if arithmetic progression formula : Sum of AP:

n/2 (a + Tn)

n = number of terms

12/2 (1 + 12)

6(13)

= 78

4 0
3 years ago
Limit as x approaches 0 of csc3x/cotx
jolli1 [7]
Hello Meggieh821, to find the lim as x approaches 0 we can check this by inserting a number that is close to 0 that is coming from the left and from the right.

For instance, we can find the lim by using the number -.00001 for x and solve
<span>csc(3x) / cot(x)
</span>csc(3*-.00001) / cot(-.00001) = .333333... = 1 /3

We also need to check coming from the right. We will use the number .00001 for x
csc(3x) / cot(x)
csc(3*.00001) / cot(.00001) = .333333... = 1 /3

So since we are getting 1/3 from the left and right we can say as x approaches 0 the limit is 1/3

<span>\lim_{x\to 0} \frac{csc(3x)}{cot(x)} = \frac{1}{3}</span>

6 0
3 years ago
Please help!! i don’t understand how to do this
Arisa [49]

Answer: A is the right angle

Step-by-step explanation:

a. 20^2 + 15^2 = 25^2

400 + 225 = 625

625 = 625

hope this helps :)

8 0
3 years ago
Four brother each bought two hotdogs and a bag of chips at the football
jeyben [28]

Answer:

A-$1.65

Step-by-step explanation:

You multiply 1.25 by 4 because each brother bought a bag of chips. Then you subtract that by the total and get $13.20 you divide that by 8 hot dog because each brother got 2 hot dogs. By dividing 8 by the  left over amount from subtracting the chips you get how much each hot dog is worth.

8 0
2 years ago
Can someone help me with this
Serjik [45]

Answer:

1, 4, 9, 16,25, 36, 49, 64, 81, 100, 121, 144

Step-by-step explanation: hope it helps

8 0
2 years ago
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