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Oksanka [162]
3 years ago
10

Solve b 3b / 7-1 = 5

Mathematics
1 answer:
ruslelena [56]3 years ago
7 0

Answer:

b= 2 over 7

Step-by-step explanation:

exact form b= 2 over 7

decimal form b= 0.285714

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Cant find the answer
dedylja [7]

Answer:

Carter family = 25 hours

Davis family = 31 hours

Step-by-step explanation:

Let's say the number of hours the Carter family used their sprinkler is x and the number of hours the Davis family used their sprinkler for is y.

So combined:

x + y = 45 hours

and we are also told that:

40x + 15y = 1300 L

So we can do simultaneous equations to solve the problem.

With some rearranging, we can figure out that:

y= 45 - x

and by substituting that into the second equation:

40x + 15 (45 -x) = 40x + 675 - 15x = 1300L

25x = 1300 - 675

25x = 625

x = 25 = hours that the Carter family used their sprinkler

and we can substitute that back into the original equation to find how many hours the Davis family used their sprinkler so:

25 + y = 56

y = 31

The Davis family used their sprinkler for 31 hours whilst the Carter family used their sprinkler for 25 hours.

7 0
1 year ago
Megan picks a card from a deck of cards numbered 1-10 and rolls a number cube. What is the probability she chooses a card with a
ehidna [41]

Answer:

1/20 if there is only those 10 cards in a deck and 1/26 if there is 52 cards in the deck.

Step-by-step explanation:

There is 3/6 chances to roll a die with an even number, aka 1/2. If there are only 10 cards in the deck and only one of them has the number 5, it's 1/10. To find the probability of both these things happening, multiply the probabilities. 1/10 x 1/2 is equal to 1/20. However, since the question doesn't specify if there is 52 cards like a normal deck and 4 5's etc, there can be a different answer because if there's 52 cards in a deck, 4 of them 5's, the chance of getting a 5 is 4/52 or 1/13 and then you multiply that by 1/2 to get 1/26

4 0
3 years ago
Read 2 more answers
The sum of two numbers is 52 . The larger number is 6 more than the smaller number. What are the numbers?
tester [92]

Answer:

the answer is 2

Step-by-step explanation:

52÷2=26

26÷2=13

3 0
3 years ago
6th grade math help me pleaseeee
Gnoma [55]

Answer:

1.4

Step-by-step explanation:

9.5+0.9t

=9.5+0.9(-9)

=9.5+-8.1

=1.4

3 0
2 years ago
Read 2 more answers
PLEASE HELP!!!!
bekas [8.4K]
.09 chance that <span>the land has oil and the test predicts that there is no oil.</span>
5 0
2 years ago
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