3 years ago

Geometry !!! True or false question

Mathematics

1 answer:

lara [203]3 years ago

7 0

Rectangle
QT = RS
QR = TS

but QR = 25 and TS = 29.15
so it's false....

answer
FALSE

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Find the square roots of 119 + 120i algebraically.

blondinia [14]

Answer:

Step-by-step explanation:

Given

z=119+120 i

Let $\sqrt{119+120 i}=p+iq$

Squaring both sides

$119+120 i=p^2-q^2+2ipq$

Comparing real and imaginary part

Re(LHS)=Re(RHS)

$119=p^2-q^2$ -----------1

comparing Im(LHS)=Im(RHS)

120=2pq

$q=\frac{60}{p}$

Substitute q in 1

$119=p^2-(\frac{60}{p})^2$

$p^4-119p^2-(68)^2=0$

Let $x=p^2$

$x^2-119x-4624=0$

$x=\frac{119\pm \sqrt{119^2+4\times 4624}}{2}$

$x=\frac{119\pm 180.71}{2}$

we take only Positive value because $p^2=x$

x=149.85

$p^2=149.85$

thus $p=\pm 12.24$

$q=\mp 4.90$

thus $\sqrt{119+120 i}=\pm (12.24+i 4.90)$

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3 years ago

Kevin is 39 years old and Daniel is 3 years old. How many years will it take until kevin is only 4 times as old as Daniel?

dimaraw [331]

The correct answer is 9 years explanation is let y be the required number of years hope it helps :)

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3 years ago

What piece of information does C identity for the formula y=ax+bx+c

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Answer:

C is the y-intercept

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There are 90 new houses being built in a neighborhood. Last month, 2/5 of them were sold. This month, 2/3 of the remaining house

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Answer:

Step-by-step explanation:

2/5*90=36

90-36=54

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ddd [48]

Answer:

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Step-by-step explanation:

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