chestercat
  • chestercat
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anonymous
  • anonymous
misty1212
  • misty1212
HI!!
anonymous
  • anonymous
hi

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misty1212
  • misty1212
a) add 9 b) divide by 4 c) take the square root
misty1212
  • misty1212
don't forget the \(\pm\)
Michele_Laino
  • Michele_Laino
if I add 9 to both sides, I get: \[\Large 4{r^2} - 9 + 9 = 91 + 9\] please simplify
anonymous
  • anonymous
4r^2=100
Michele_Laino
  • Michele_Laino
ok! now I diveide by 4, both sides, so I get: \[\Large {r^2} = \frac{{100}}{4}\]
Michele_Laino
  • Michele_Laino
please simplify
anonymous
  • anonymous
25
Michele_Laino
  • Michele_Laino
ok! now we have to take the square root of both sides, so we can write: \[\Large r = \pm \sqrt {25} = ...\]
anonymous
  • anonymous
so now just the square root of 25?
Michele_Laino
  • Michele_Laino
yes! please remember we have two values since we can write this: (-5)^2= 25 (+5)^2=25
Michele_Laino
  • Michele_Laino
so we can write: \[\Large r = \pm \sqrt {25} = \pm 5\]
anonymous
  • anonymous
so the answer is
anonymous
  • anonymous
@Michele_Laino is C correct?
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
yes! It is correct!
anonymous
  • anonymous
can u hrelp me with more please?
Michele_Laino
  • Michele_Laino
ok!
anonymous
  • anonymous
*help
anonymous
  • anonymous
lol
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
if we take the square root of both sides, we get: \[\Large z + 7 = \pm \sqrt 3 \]
Michele_Laino
  • Michele_Laino
now, I subtract 7 at both sides, so I get: \[\Large z + 7 - 7 = \pm \sqrt 3 - 7\] please simplify
anonymous
  • anonymous
z= 4
Michele_Laino
  • Michele_Laino
no, since at the right side we have not 7-3, the the simplified expression is: \[\Large z = - 7 \pm \sqrt 3 \]
anonymous
  • anonymous
so a?
Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
more?
anonymous
  • anonymous
please?
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
if we subtract 4 from both sides, I get: \[\Large {x^2} - 12x + 36 - 4 = 4 - 4\] please simplify
anonymous
  • anonymous
???
Michele_Laino
  • Michele_Laino
what is 36-4=...?
Michele_Laino
  • Michele_Laino
after that simplification, we can write this: \[\Large {x^2} - 12x + 32 = 0\]
anonymous
  • anonymous
ok so whats the answer
Michele_Laino
  • Michele_Laino
now we have to solve that equation. Do you know how to solve that quadratic equation?
anonymous
  • anonymous
nope
anonymous
  • anonymous
anonymous
  • anonymous
@Michele_Laino how do i?
Michele_Laino
  • Michele_Laino
then we have to apply another method
anonymous
  • anonymous
kk how?
Michele_Laino
  • Michele_Laino
we have to search for 2 numbers, such that their sum is 12 and their product is 32
anonymous
  • anonymous
8 4
Michele_Laino
  • Michele_Laino
that's right! so the requested factorization is: \[\Large {x^2} - 12x + 32 = \left( {x - 8} \right)\left( {x - 4} \right)\]
anonymous
  • anonymous
so C?
Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
using the rule of the square of a binomial, we can write this: \[\Large {y^2} + 14y + 49 = {\left( {y + 7} \right)^2}\]
Michele_Laino
  • Michele_Laino
now: for what values for y, we have \[\Large {\left( {y + 7} \right)^2}=0\]
Michele_Laino
  • Michele_Laino
if y= -7, what is (y+7)^2=...
anonymous
  • anonymous
Michele_Laino
  • Michele_Laino
ok! so what is the requested value of y?
anonymous
  • anonymous
answer A?
Michele_Laino
  • Michele_Laino
that value for y is y=-7, since (-7+7)^2=0 so what is the right option?
anonymous
  • anonymous
a or b
Michele_Laino
  • Michele_Laino
I think option d
anonymous
  • anonymous
u r right
Michele_Laino
  • Michele_Laino
thanks! :)
anonymous
  • anonymous
hey quick question r u good at english too?
Michele_Laino
  • Michele_Laino
I try, please keep in mind that I'm Italian
anonymous
  • anonymous
oh ok but you do know i mean grammar right?
Michele_Laino
  • Michele_Laino
yes!
anonymous
  • anonymous
lol im stuck on complements
Michele_Laino
  • Michele_Laino
ok! please post your question
anonymous
  • anonymous
Which describes the underlined word in the sentence? The boys were playing a GAME of chess. A. direct object B. indirect object C. predicate adjective D. predicate nominative
Michele_Laino
  • Michele_Laino
please wait I'm ponedering....
anonymous
  • anonymous
kk
Michele_Laino
  • Michele_Laino
I think direct object, namely option A
anonymous
  • anonymous
i htought the same thing... more?
Michele_Laino
  • Michele_Laino
ok!
anonymous
  • anonymous
more?
Michele_Laino
  • Michele_Laino
ok!
anonymous
  • anonymous
Which describes the underlined word in the sentence? The boys are (champions) at the game of chess. A. predicate nominative B. indirect object C. direct object D. predicate adjective
anonymous
  • anonymous
i think its A
Michele_Laino
  • Michele_Laino
I'm pondering...
anonymous
  • anonymous
kk
Michele_Laino
  • Michele_Laino
yes! that's right!
anonymous
  • anonymous
Which describes the underlined word in the sentence? Rosalie loaned CINDY a vase for the flowers. A.direct object B.predicate adjective C.predicate nominative D.indirect object
anonymous
  • anonymous
i think its D
Michele_Laino
  • Michele_Laino
yes! I think so!
anonymous
  • anonymous
Which describes the underlined word in the sentence? Along with the flowers, Sally gave me a packet of seeds. A. predicate nominative B. indirect object C. predicate adjective D. direct object I think its B
Michele_Laino
  • Michele_Laino
please, what is the underlined part?
anonymous
  • anonymous
me
Michele_Laino
  • Michele_Laino
yes! I confirm your option
anonymous
  • anonymous
Which describes the underlined word in the sentence? The principal's voice is the SOUND of authority. A. indirect object B. predicate nominative C. predicate adjective D. direct object i think it's either B or D
Michele_Laino
  • Michele_Laino
I think direct object, namely option D
Michele_Laino
  • Michele_Laino
please wait
Michele_Laino
  • Michele_Laino
I think that the right option is B, namely "predicate nominative"
anonymous
  • anonymous
Which word is the indirect object in this sentence? Since he hurt his foot, Corey gave her his skateboard to use. A. foot B. his C. Corey D. her
anonymous
  • anonymous
anonymous
  • anonymous
misty1212
  • misty1212
hi!
misty1212
  • misty1212
what do you need help with?
anonymous
  • anonymous
Which word is the indirect object in this sentence? Since he hurt his foot, Corey gave her his skateboard to use. A. foot B. his C. Corey D. her
anonymous
  • anonymous

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