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marusya05 [52]
3 years ago
12

Please help Thank you​

Mathematics
2 answers:
n200080 [17]3 years ago
6 0

Answer:

13/30

Step-by-step explanation:

2/5 + m = 5/6

m = 25/30 - 12/30

kondor19780726 [428]3 years ago
6 0

Answer is: -13/30

Step-by-step explanation:

if you subtract 2/5 by 5/6 it gives you -13/30

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What would this question look like after we change the mixed number to improper & use KCF to rewrite the question?
iris [78.8K]

Answer:

The question 3\frac{1}{2}\div\frac{1}{3} after change the mixed number to improper & using KCF will become : \mathbf{=\frac{7}{2}\times \frac{3}{1}}

Option B is correct option.

Step-by-step explanation:

We need to change the mixed number to improper & use KCF to rewrite the question.

The expression is: 3\frac{1}{2}\div\frac{1}{3}

First converting mixed fraction into improper fraction

Multiply whole number with the denominator i,e (3*2=6) now add the numerator i.e (6+1) = 7/2

Solving:

3\frac{1}{2}\div\frac{1}{3}\\=\frac{7}{2}\div\frac{1}{3}

Using KCF

KCF stands fro Keep it, Change it, Flip it.

It is used when division sign is converted to multiplication the term (1/3) is reversed to (3/1)

So, our expression will be

=\frac{7}{2}\times \frac{3}{1}

So, The question 3\frac{1}{2}\div\frac{1}{3} after change the mixed number to improper & using KCF will become : \mathbf{=\frac{7}{2}\times \frac{3}{1}}

Option B is correct option.

5 0
3 years ago
Help? Show work!<br> Triangle PQR ≅ Triangle XYZ<br> PQ = 3a + 4 and XY = 5a – 12. Find a and PQ.
Ivenika [448]

Given:

\Delta PQR\cong \Delta XYZ

PQ=3a+4

XY=5a-12

To find:

The value of a and PQ.

Solution:

We have,

\Delta PQR\cong \Delta XYZ

PQ\cong XY                            (CPCTC)

So,

PQ=XY

3a+4=5a-12

Isolating variable terms, we get

3a-5a=-4-12

-2a=-16

Divide both sides by -2.

a=\dfrac{-16}{-2}

a=8

Now,

PQ=3a+4

PQ=3(8)+4

PQ=24+4

PQ=28

Therefore, the value of a is 8 and the value of PQ is 28.

5 0
3 years ago
When a number is increased by 12, the results is equal to twice the number equation
Mila [183]

Let the number be x

x + 12 = 2(x + 12)

x + 12 = 2x + 24

x - 2x = 24 - 12

-x = 12

x = -12

The number is -12.

3 0
3 years ago
Determine which of the following equations are perpendicular to each other. I. y=-3x+2
iogann1982 [59]
Write each equation in y = mx + b form so that you can compare the slopes.
Perpendicular slopes are opposite reciprocals.
For example: 2/3 and - 3/2; 4/5 and -5/4; 1/2 and -2

I. y = -3x + 2                 m = -3
II. y = 3/2 x + 1/2          m = 3/2
III.  y = - 1/3x  + 1/3      m = -1/3
IV. y = 1/3x + 9             m = 1/3          (I assuming this one had a typo in it                                                                   since there is no equal sign.) 
LETTER B is the answer I & IV
4 0
4 years ago
PLS HELP! DUE TODAY
Ostrovityanka [42]

Answer:

3 I think not sure.........

6 0
3 years ago
Read 2 more answers
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