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saveliy_v [14]
3 years ago
8

A brother is two years older than his sister.In 10 years time the sum of their ages will be 48.Find their present ages​

Mathematics
1 answer:
defon3 years ago
7 0

Answer:

sister-13

brother-15

Step-by-step explanation:

make a simple equation using the information given:

(s+10)+(s+2+10)=48

simplify for s and you will find the sister's age. Add two for the brothers age.

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4 is the least the amount of sides the polygon can have
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Find x, y, and z. plsssssssssssssssssss
Alona [7]

Answer:

z= 104

y=76

x=76

Step-by-step explanation:

z+76= 180. solve for z

z=x

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3 0
2 years ago
EFV and EDW are straight lines.<br>Find the value of x and of y.​
Makovka662 [10]

Answers:

x = 72

y = 83

============================================================

Explanation:

Angle VFG is 50 degrees. The angle adjacent to this is angle EFG which is 180-50 = 130 degrees.

Angle HDW is 77 degrees. The supplementary angle adjacent to this is 180-77 = 103 degrees which is angle EDH.

Pentagon EFGHD has the following five interior angles

  • E = x
  • F = 130
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  • H = 65
  • D = 103

Note that angles F = 130 and D = 103 were angles EFG and EDH we calculated earlier.

For any pentagon, the interior angles always add to 180(n-2) = 180(5-2) = 180*3 = 540 degrees.

This means,

E+F+G+H+D = 540

x+130+170+65+103 = 540

x+468 = 540

x = 72

---------------------------------------

Now focus your attention on triangle THS

We see that the interior angles are

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The angle H is 65 degrees because it's paired with the other 65 degree angle shown. They are vertical angles.

For any triangle, the angles always add to 180

T+H+S = 180

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7 0
3 years ago
Find sin X, sin Z, cos X, and cos Z. Write each answer as a simplified fraction.
just olya [345]

Answer:

Find the answers below

Step-by-step explanation:

Using m<X as the reference angle

Opposite YZ = 7

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Hypotenuse XZ = √149

Using the SOH CAH TOA identity

sinX = opp/hyp

sinX =YZ/XZ

sinX = 7/√149

For cos X

cos X = adj/hyp

cos X =10/√149

Using m<Z as reference angle;

Opposite XY = 10

Adjacent  YZ = 7

Hypotenuse XZ = √149

Using the SOH CAH TOA identity

sinZ = opp/hyp

sinZ =10/√149

sinZ = 7/√149

For cos Z

cosZ = 7/√149

7 0
3 years ago
Mr.Reed harvested 941 ears of corn.He will group them into dozens and place them in sacks to sell at a market.what is the greate
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