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Veseljchak [2.6K]
2 years ago
10

Angles E and Fare in ration 2:5. If the sum of E+F=70, What are the

Mathematics
2 answers:
mixas84 [53]2 years ago
4 0

Answer:

m\angle E = 20\degree \\m\angle F = 50\degree

Step-by-step explanation:

Let the common multiplier of the given ratios be x.

\therefore m\angle E = 2x\\\&  \: m\angle F = 5x \\\because m\angle E + m\angle F = 70\degree \\\therefore 2x + 5x = 70\degree \\\therefore 7x = 70\degree \\\therefore x = \frac{70\degree}{7}\\\therefore x = 10\degree \\\implies m\angle E = 2x= 2\times 10\degree = 20\degree \\\& \:  m\angle F = 5x=5\times 10\degree = 50\degree \\

LenKa [72]2 years ago
3 0

Answer:

E is equal to 20 and F is equal to 50. 20(E)+50(F)=70

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mamaluj [8]

Divide 1440 by 6 to get 240 packs.

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Please help! A chemist has 100ml of 25% acid solution. How much of the solution does she need to drain and replace with 70% acid
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3 years ago
a can of pinapple juice is a cylinder with a radius of 2.4 in. and a height of 11. what is the are odf the label around the can
pshichka [43]
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A≈202.07
hopes that helps


8 0
2 years ago
Please give real answers with an explaination. I will follow + I will give the brainliest. No Docs/No Files/No Links only answer
Norma-Jean [14]

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129 = x

Step-by-step explanation:

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47+82 = x

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6 0
2 years ago
Read 2 more answers
Find the value of x³+ y³ + z³ – 3xyz if x² + y² + z² = 83 and x + y + z = 15​
raketka [301]

identity used is

x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx).

then use

(x+y+z)² = x²+y²+z²+2(xy+yz+xz)

225= 83 + 2(xy+yz+xz)

xy+yz+xz = (225-83)/2

xy+yz+xz= 142/2

xy+yz+xz= 71

ok

now use identity

x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx).

now

x³ + y³+ z³– 3xyz = 15 (83 – xy – yz – zx).

= 15[83 - (71)]

= 15×12

=180

4 0
3 years ago
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