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dimulka [17.4K]
3 years ago
10

Help me with mathhs .

Mathematics
2 answers:
jeka57 [31]3 years ago
3 0

Step-by-step explanation:

a-b

a=1/4

b= -2,15 -215/100 semplification -43/20

1/4-(-43/20)

1/4+43/20 minimum comune multiple

5+43/20=

48/20=12/5

Anna71 [15]3 years ago
3 0

Answer:

3.4

\frac{17}{5}

3\frac{2}{5}

Step-by-step explanation:

a-b=1\frac{1}{4}-(-2.15)

=\frac{5}{4} +2.15

=1.25+2.15

=3.4

In fraction

3.4=\frac{34}{10} =\frac{17}{5}

mixed number

\frac{17}{5} =3\frac{2}{5}

I hope this help you

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.. 56 +8x = 40 +10x . . . . . multiply by 100, eliminate parentheses
.. 16 = 2x . . . . . . . . . . . . . . add -40-8x, then divide by 2
.. 8 = x

8 liters of 8% lemonade should be added to make the mixture 10% lemon juice.
4 0
3 years ago
S is inversely proportional to t.<br>When s<br>0.4, t = 4<br>Work out s when t = 0.8​
Yuliya22 [10]
S = 2

0.4x4 = 1.6
1.6/0.8 = 2
3 0
3 years ago
Last week a candle store received $515.90 for selling 30 candles. Small candles sell for $11.25 and large candles sell for $22.4
alex41 [277]

Answer:

16

Step-by-step explanation:

x+y=30  solve for x   x=30-y

substitute x with 30-y and solve

11.25x+22.4y=515.9

11.25(30-y)+22.4y=515.9

337.5+11.15y=515.9

11.15y=178.4

y=16

since we're solving for just large candles it's 16

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8 0
3 years ago
3(5j+2)=2(3j-6) how do i do this
ohaa [14]

3(5j+2)=2(3j-6) do distributed to remove parenthesis  15j+6=6j-3 . Then move all j to left side and the second term to right side 15j-6j=-3-6. Now solve both sides  9j= -9. Now divide both sides by 9 to get j alone to j =  -1

5 0
3 years ago
Read 2 more answers
How many terms are there in a geometric series if the first term is 3, the common ratio is 4, and the sum of the series is 1,023
tatiyna
In Geometric Progression, we know S(n) = a.(rⁿ - 1 ) / r - 1
Here, a = 3, r = 4 a(n) = 1,023
1023 = 3 (4ⁿ - 1) / (4 - 1)
3(4ⁿ - 1) = 1023 * 3
4ⁿ - 1 = 3069 / 3
4ⁿ = 1023 + 1
4ⁿ = 1024
4⁵ = 1024

In short, Your Answer would be 5 Terms

Hope this helps!



6 0
3 years ago
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