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liubo4ka [24]
3 years ago
12

Materials

Mathematics
1 answer:
xeze [42]3 years ago
3 0

Answer:

d

Step-by-step explanation:

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If it takes 3 days for 10 workers to finish building one house, how many days will it take 15 workers to finish four houses?
Ksivusya [100]
-- It takes 10 workers 3 days to build 1 house.
so
-- It takes 10 workers 1 day to build  1/3  of a house.
so
-- It takes 1 worker 1 day to build  1/30  of a house.

You got 15 workers and you need 4 houses ?

Well, as we just calculated . . .

-- It takes 1 worker 1 day to build  1/30  of a house.
so
-- It takes 15 workers 1 day to build  15/30 = 1/2  of a house.
so
-- It takes 15 workers 2 days to build 1 whole house.
so
-- It takes 15 workers  8 days  to build 4 houses.


8 0
3 years ago
If f(x) varies directly with x and f(x) = 72 when x = 6, find the value of f(x) when x = 3.
yaroslaw [1]

Answer:

36

Step-by-step explanation:

Since f(x) varies directly with x, f(x) can be expressed alternatively as \[f(x) = k * x\] where k is a constant value.

Given that f(x) is 72 when the value of x is 6.

This implies, \[72 = k * 6\]

Simplifying and rearranging the equation to find the value of k:

k = \frac{72}{6}

Hence k = 12

Or, \[f(x) = 12 * x\]

When x = 3, \[f(x) = 12 *3 \]

Or in other words, the value of f(x) when x=3 is 36

6 0
4 years ago
Read 2 more answers
What if I replace-x with -3?<br> Y= -x +6
Sunny_sXe [5.5K]

Answer:

y=9

Step-by-step explanation:

replace the x only with -3

you get y = - -3 + 6

Two negatives= positive

+3+6=9

y=9

8 0
3 years ago
Read 2 more answers
Which graph shows a negative rate of change for the interval 0 to 2 on the axis?​
Nadusha1986 [10]

Answer:

the answer to your question is the fourth one listed on your multiple choice, where it shows it curving at the lowest point out of all the others , in the 4th quadrant

8 0
4 years ago
Please help me guysthank you this question is really hard
disa [49]
The answer is 18
I hope I helped! ♥
7 0
3 years ago
Read 2 more answers
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