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navik [9.2K]
3 years ago
15

-0.5(x + 0.3) – 0.2x = 4.1

Mathematics
1 answer:
lys-0071 [83]3 years ago
3 0

Answer:

x=-8

Step-by-step explanation:

I always change the decimals into whole numbers by multiplying them by 10.  If you do this, it is much easier to solve.  All you do is multiply every term by 10.

the equation changes to

-5(x+3)-2x=41

-5x-15-2x=41

combine like terms

-7x-15=41

bring the 15 over to the 41

-7x=56

divide everything by 7

-x=8

change x to a positive

x=-8

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{x | x ∈ N and x is greater than 13}
denis23 [38]

Answer:

x = (14,15,16,,,,,,n)

Step-by-step explanation:

Here,x belongs to set of natural number N

and Condition given for set is " x is greater than 13 "

Now, N=(1,2,3,4,5,6,,,,n) and given that x > 13.

thus, x = (14,15,16,,,,,,n)

7 0
3 years ago
Divide 450 grams into ratio 7:2
ser-zykov [4K]
Let us assume the common ratio = x
Then from the given question we can write
7x + 2x = 450
9x = 450
x = 450/9
   = 50
Then the quantity 450 grams can be divided in the ratio of 7 : 2 by = 7x:2x
                                                                                                          = (7 * 50) : (2 * 50)
                                                                                                          = 350:100
I hope this is the answer you were looking for and the procedure for finding the answer is also absolutely clear to you.
6 0
4 years ago
I'm trying to do this problem, but I have no idea how to even start it:
zhannawk [14.2K]

Answer given in the picture above.

3 0
4 years ago
For which values is the graph decreasing? Check all
Alexeev081 [22]

Answer:

between x=-1.5 and x = 0

between x = 0 and x = 1.5

Step-by-step explanation:

For the interval -1.5 < x < 1.5, we can see that the slope is negative (i.e from top left to bottom right). Hence it can be said that the graph is decreasing during this interval.

For the other parts of the graph (as shown) the slope is positive (i.e from bottom left to top right). in those areas, the graph is increasing.

5 0
3 years ago
Read 2 more answers
12. Christine buys a calculator costing £5.95 a pencil case costing £1.62 a ruler costing 25p two pens costing 48p each She pays
KengaRu [80]

Answer:

£1.22

Step-by-step explanation:

Total cost: 5.95+1.62+0.25+2(0.48)=8.78

Change: 10-8.78=1.22

5 0
1 year ago
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