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Dimas [21]
3 years ago
15

Solve the problem n-6=21

Mathematics
2 answers:
yuradex [85]3 years ago
7 0

Answer:

n=27

Step-by-step explanation:

sammy [17]3 years ago
4 0

Answer:

27

Step-by-step explanation:

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19

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Which graph shows the solution to the inequality -3x-7<20
Anestetic [448]

Answer:

-9 < x

Step-by-step explanation:

-3x - 7 < 20

+ 7 + 7

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The above answer is written in reverse, which is the exact same result.

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3 years ago
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In the right triangle ?ABC, leg AC=6 cm and leg BC=8 cm. Point M and N belong to AB so that AM:MN:NB=1:2.5:1.5. Find area of ?MN
Licemer1 [7]

Given : In Right triangle ABC, AC=6 cm, BC=8 cm.Point M and N belong to AB so that AM:MN:NB=1:2.5:1.5.

To find : Area (ΔMNC)

Solution: In Δ ABC, right angled at C,

AC= 6 cm, BC= 8 cm

Using pythagoras theorem

AB² =AC²+ BC²

      =6²+8²

     = 36 + 64

→AB²  =100

→AB²  =10²

 →AB  =10

Also, AM:MN:NB=1:2.5:1.5

Then AM, MN, NB are k, 2.5 k, 1.5 k.

→2.5 k + k+1.5 k= 10

→ 5 k =10

Dividing both sides by 2, we get

→ k =2

MN=2.5×2=5 cm, NB=1.5×2=3 cm, AM=2 cm

As Δ ACB and ΔMNC are similar by SAS.

So when triangles are similar , their sides are proportional and ratio of their areas is equal to square of their corresponding sides.

\frac{Ar(ACB)}{Ar(MNC)}=[\frac{10}{5}]^{2}

\frac{Ar(ACB)}{Ar(MNC)}=4

But Area (ΔACB)=1/2×6×8= 24 cm²[ACB is a right angled triangle]

\frac{24}{Ar(MNC)}=4

→ Area(ΔMNC)=24÷4

→Area(ΔMNC)=6 cm²

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3 years ago
What does x value <br><br> 4x-2=3
Vaselesa [24]

Answer: 1.25

Step-by-step explanation:

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Determine the number of significant digits in the measurement 3.08 cm​
BabaBlast [244]
<h3>The measurement of 3.08 cm has 3 significant digits in it .</h3>

We say this because a measurement is considered significant if it has non zero numbers in it , which 3.08 cm has . And a measurement is considered a significant digit if it has zero between it's non zero digits . Hence we say that 3.08 cm has 3 significant digits .

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3 years ago
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