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2 years ago

Please help! math! (17 points was max) PICTURE ATTACHED

Mathematics

1 answer:

mario62 [17]2 years ago

6 0

Step-by-step explanation:

angle A and Angle D are congruent. as are Angle C and Angle F.

because you have two pairs of congruent angles this proves the triangles are similar using AA Theorem.

I couldn't read the 3rd question. if you post as a comment I can look at it better.

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HI I need help please <br> Its in the pictures

Brut [27]

1.

$r=32\,\text{units}\\\\
A=\pi\cdot r^2=\pi\cdot32^2=1024\pi\,\,\text{units}^2$

Answer D.

2.
From secant theorem, we know, that:

$|AE|\cdot|BE|=|DE|\cdot|CE|$

and from picture:

$|BE|=x+1\\\\|CE|=x+4\\\\|AE|=11+x+1=x+12\\\\|DE|=1+x+4=x+5$

So we can calculate:

$|AE|\cdot|BE|=|DE|\cdot|CE|\\\\(x+12)\cdot(x+1)=(x+5)\cdot(x+4)\\\\
x^2+12x+x+12=x^2+5x+4x+20\\\\
x^2+13x+12=x^2+9x+20\quad|-x^2\\\\13x+12=9x+20\quad|-9x\\\\4x+12=20\quad|-12\\\\4x=8\quad|:4\\\\\boxed{x=2}$

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3 years ago

A coat costs £56 in the sale after a 20% discount. What was the original price?

Arturiano [62]

Answer:

£70

Step-by-step explanation:

y×0.8=56

56/0.8= 70

70×0.8=56

you're just reversing the discount :)

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Answer:

Step-by-step explanation:

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3 years ago

Work out m and c for the line: y = 4 x − 1

vaieri [72.5K]

Answer:

m=4 and c=-1

Step-by-step explanation:

I'm assuming that m is the slope and c is the y-intercept. (If this is not the case, please tell me and I'll fix my answer).

The equation is already in the form y=mx+c so you just take the numbers from the problem y=4x-1.

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vlada-n [284]

Answer:

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Step-by-step explanation:

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