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MrRissso [65]
3 years ago
14

Three times a number, plus 6.4, is 13.9

Mathematics
1 answer:
yawa3891 [41]3 years ago
5 0
The unknown number equals to 2.5

3x+6.4=13.9
Subtract 6.4 from both sides
3x=7.5
Divide 3 on both sides
X=2.5
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2 and the square root of 81 + the square root of 64
Veseljchak [2.6K]

Answer:

74.5

Step-by-step explanation:

i did it on my calculator and it says it is 74.5.

5 0
3 years ago
Two parallel lines are crossed by a transversal.<br> What is the value of x? <br> ??!!!??!!!!!????
snow_tiger [21]
The answer for this problem: X = 12.
8 0
4 years ago
Read 2 more answers
Please help me, ill give brainliest
Rzqust [24]

Answer:

m∠RST = 20

Step-by-step explanation:

Sine the line SP bisects ∠RST, we know that the two angles that were formed are equal.  Set ∠RSP equal to ∠PST.

∠RSP = ∠PST

3x - 2 = 9x - 26

(3x - 2) + 2 = (9x - 26) + 2

3x = 9x - 24

3x - 9x = (9x - 24) - 9x

-6x = -24

(-6x)/-6 = -24/-6

x = 4

Now that you know the value of x, add ∠RSP and ∠PST.  This will give you m∠RST.

m∠RST = (3x - 2) + (9x - 26)

m∠RST = 3x - 2 + 9x - 26

m∠RST = 12x - 2 - 26

m∠RST = 12x - 28

m∠RST = 12(4) - 28

m∠RST = 48 - 28

m∠RST = 20

5 0
3 years ago
For water to be a liquid, its temperature must be within 50 Kelvin of 323 Kelvin. Which equation can be used to determine the mi
Hoochie [10]

Answer:

its 323 so you were right :) if 323 is your answer lol

Step-by-step explanation:

abs(T-50)=323 Where T is in degrees Kelvin.

abs () means absolute value.

So T=323 plus or minus 50

8 0
3 years ago
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igor_vitrenko [27]

Answer:

11.82 kilometers in Luis's journey in total

Step-by-step explanation:

As per the statement:

To visit his grandmother

Distance Luis takes a train 6.37 kilometers

Distance  Luis takes a car 5.45 kilometers.

We have to find the total distance.

\text{Total distance} = \text{distance by train}+\text{distance by car}

Substitute the given values we have;

\text{Total distance Lui's journey} = 6.37+5.45 = 11.82 km

Therefore, 11.82 kilometers in Luis's journey in total


4 0
3 years ago
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