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defon
3 years ago
12

Please help me with this..

Mathematics
1 answer:
AleksandrR [38]3 years ago
6 0

Answer:

f = 1

Step-by-step explanation:

Use the method of cross- multiplication

\frac{a}{b} = \frac{c}{d} ⇒ ad = bc, thus

20f = 5(f + 3) ← distribute

20f = 5f + 15 ( subtract 5f from both sides )

15f = 15 ( divide both sides by 15 )

f = 1

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Step-by-step explanation:

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3 years ago
A triangle has a height of 15 in. and a area of 120 in. What is the length of it's base?
jek_recluse [69]

Answer:

b=16

Step-by-step explanation:

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(you can substitute the value to check-i've done it below)

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7 0
3 years ago
What is the measure of the third angle?
SCORPION-xisa [38]
The total amount of degrees in a triangle is 180. All three angles should add up to 180˚

We know that 40+60 = 100

The next step is to do 180-100 to get the other angle.
180-100 = 80

So the measure of the third angle is 80˚

Hope this helps!

(Also if you want to do this in one equation, you would do 40+60+x = 180
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100+x = 180 (combine like terms)
x = 80 (Subtract 100 from both sides)
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4 years ago
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