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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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Evaluate 1/4c+3d when c=6 and d=7
labwork [276]

\dfrac{1}{4}c+3d

Put the values of c = 6 and d = 7 to the expression:

\dfrac{1}{4}\cdot6+3\cdot7=\dfrac{1}{2}\cdot3+21=1.5+21=22.5

5 0
3 years ago
I need help with number 3 please and thank you
murzikaleks [220]
So here we're dealing with equivalent fractions.
It's really simple to find the answer, so I'll try to explain the best I can.

2 dogs / 5 cats is really just 2/5.
If we want to find an equivalent fraction, we have to multiply the numerator and the denominator by the same number.

Currently the number of cats is 5, and we need it to be 140. What we need to do is find the number it has to be multiplied by to equal 140, which is 140 divided by 5. 140 divided by 5 is 28, so 5 x 28 = 140!

We need to multiply the denominator (5) by 28, so that we can get 140. What we have now is ?/140.

Like I said, to find an equivalent fraction, we need to multiply the numerator by the same number as we did the denominator, which is 28!

2 x 28 = 56.

So 2/5 is the same as 56/140.

The answer is D) 56 Dogs/140 Cats.

Hope this helps!
If you're confused about anything leave me a reply and I'll try to explain the best that I can!
3 0
3 years ago
I have $1000 invested in a coin worth $43000. If the coin reaches $100000 how much will I have invested?
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Step-by-step explanation:

I have $1000 invested in a coin worth $43000. If the coin reaches $100000 how much will I have invested?

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