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2 years ago

Which value is equivalent to x-7/7-x A) -7 B) -1 C) 1 D) 7

Mathematics

2 answers:

I am Lyosha [343]2 years ago

5 0

(x-7)/(7-x) if you factor out -1 from the numerator you get:

-(7-x)/(7-x) which is equal to:

-1

gtnhenbr [62]2 years ago

5 0

The answer is B, because x-7/7-x will equal the negative version of the number on each end, which divided to -1.

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The sides OP and RO of triangle POR are produced to points S and T respectively. If ∠SPR = 145° and ∠POT = 115° , find ∠PRO

Margarita [4]

Answer:

$\angle PRQ = 80$

Step-by-step explanation:

Given

$\angle SPR = 145^o$

$\angle POT = 115^o$

See attachment

Required

Find $\angle PRO$

First, calculate $\angle RPO$

$\angle RPO + \angle SPR = 180$ --- angle on a straight line

So, we have:

$\angle RPO + 145 = 180$

Collect like terms

$\angle RPO = 180 - 145$

$\angle RPO = 35$

Next, calculate PQR

$\angle POR + \angle POT = 180$

So, we have:

$\angle POR + 115 = 180$

Collect like terms

$\angle POR = 180-115$

$\angle POR = 65$

So, PRO is calculated as:

$\angle PRO + \angle POR + \angle RPO = 180$ --- angles in a triangle

So, we have:

$\angle PRO + 65 + 35= 180$

$\angle PRO + 100= 180$

Collect like terms

$\angle PRO = 180-100$

$\angle PRO = 80$

3 0

2 years ago

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irinina [24]

Answer:

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Step-by-step explanation:

first you rule out all positive numbers

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