Question

I got the last 3 problems correct and then my mind went blank ...help please ?!?!?!?!

Daniel is 4 times as old as Jessica and is also 15 years older than Jessica.

How old is Jessica?

Answer 1

Daniel = d
Jessica = j
d=4j + 15

Answer 2

hi

Answer 3

I got that formula
d=4j+15 , but all of a sudden my mind went blank and i forgot what to do x_x

Answer 4

Is there any other information? Jessica could be any age with this information about the problem.

Answer 5

I got the answer I think

Answer 6

Or any answer choices?

Answer 7

no that is all the info given, the last three were the same and i figured those out

Answer 8

Could you post one of the other 3 with the answer to see if that helps me figure this out?

Answer 9

I got j=5 because if you multiply that by 4 you get twenty which is also. 15 years older

Answer 10

Sorry but I can't go back through the questions, this is on khanacademy.org so once you move on to the next question you cant go back

Answer 11

Syd is right. The formula should be D+15=4J

Answer 12

@SydtheKid913 yes !!! that is how I worked out the other ones, thank you soooo much xD

I have 1 left can yall help this one is much more complex ughh :(

Answer 13

so i had the info for the formula right, but the actual formula i was using was wrong darnnnn !!

Answer 14

I will try. \(\huge\ddot\smile\) Go ahead and post it.

Answer 15

Sure! Can you medal me? (Trying to boost smartscore):)

Answer 16

O nevermind:)

Answer 17

Christopher is 2 times as old as Vanessa. 35 years ago, Christopher was 7 times as old as Vanessa.

How old is Christopher now?

p.s I could use some medals too if you don't mind ...
p.s.s @sleepyjess how did you get that smiley face insert ? :O

Answer 18

C=2V
35 years ago
C-35=7V-35
Is what I am thinking for this one

Answer 19

\(\huge\ddot\smile\ )
without spaces @Bookworm14

Answer 20

\(\huge\ddot\smile\)

Answer 21

Hey it worked!

Answer 22

If you want to learn more I can teach you

Answer 23

Whoa! That's AWESOME

Answer 24

okay how about we finish the math problem first and then we learn those cool tricks !?!?!?

Answer 25

Ok \(\huge\color{#00bfff}{\ddot\smile}\)

Answer 26

Cool

Answer 27

What do you think of my equations @SydtheKid913

Answer 28

C=2V
35 years ago
C-35=7V-35

Answer 29

I think they look hard :P

Answer 30

Jk I'm still workin on it but I'm getting there

Answer 31

so here is what I got they might look a little different but im just guessing here

C=2V
(V-35)*7= C-35
Idk for sure though

Answer 32

@ganeshie8

Answer 33

C=2V
35 years ago
C-35=7V-35

Answer 34

Lets try a number for V and see what that does. Maybe 40?

Answer 35

@cody7744 @Cody17 @jakewoln @Faceomo @DangerousJesse @agent0smith @undeadknight26

okay sounds good @sleepyjess

Answer 36

That's what I've been doing

Answer 37

hi there

Answer 38

C=2(40)
c=80
80-35=(40-35)*7
45=5*7
45=35
V isnt 40

Answer 39

Maybe we should try a lower number? idk

Answer 40

@haleyelizabeth2017, @iambatman, @ParthKohli

Answer 41

So I know that V has to be greater 35 thats for sure

Answer 42

Yes

Answer 43

So look for multiples of 7 greater than. 35

Answer 44

C=2(37)
C=74
74-35=(37-35)*7
39=2*7
39=14
not 37

c=2(42)
c=84
84-35=(42-35)*7
49=7*7
49=49
YYYYYYAAAAAAAAYYYYYYY

Answer 45

No way I was just about to tell yall that I though the answer was 42 !!!!! now lets see if its right ...................

Answer 46

I just tested it up there lol

Answer 47

I got it!

Answer 48

I got the answer!

Answer 49

Christopher is 84 now.

Answer 50

what the heck i entered it and it was wrong, so i looked at how they worked it out and the answer isnt even a whole number??? im gonna post a pic of how they worked it out and see if it makes sense to yall ????

Answer 51

C=84 V=42
35 years ago V=7 and C=49

Answer 52

wait no the correct answer was 84 i forgot to multiply by 2 x_x great now i have to do five more of these (facepalms)

Answer 53

NOOOOOOO!!!!!!!! lol

Answer 54

I just posted the answer you didn't have to get it wrong :/

Answer 55

Im doomed I should pay more attention ughhhhhh

Answer 56

We will help you. Or at least I will. I don't know about @SydtheKid913

Answer 57

thank you @sleepyjess that means alot :') \(\huge\ddot\smile\)

Answer 58

okie dokie here we go ....

Gabriela is 30 years younger than Omar. For the last four years, Omar and Gabriela have been friends. Eighteen years ago, Omar was 4 times as old as Gabriela.

How old is Omar now?

Answer 59

Hey!! @sleepyjess I'll help too!

Answer 60

G=O-30
(G-18)*4=O-18

Answer 61

I didn't know if you were still available so I didn't want to commit you to helping lol @SydtheKid913

Answer 62

Lol XD

Answer 63

Someone has got to help me with my algebra1b when were done here though

Answer 64

okay so i got the same formula lets start substituting #'s , in this one we know that Gabriella is gonna have to be older than 18

@SydtheKid913 if I have time I will do my best to help you :)

Answer 65

Thanks! What math is this?

Answer 66

Lets see if Omar is 60
G=60-30
G=30
(30-18)*4=60-18
12*4=42
48=42
darn almost

Maybe he is 52?
G=52-30
G=22
(22-18)*4=52-18
4*4=34
16=34
nope

56?
G=56-30
G=26
(26-18)*4=56-18
8*4=38
32=38
grrrrr

58 it has to be
G=58-30
G=28
(28-18)*4=58-18
10*4=40
40=40
YYYYYYYYAAAAAAAYYYYYYY

Answer 67

Good job!

Answer 68

It is Algebra 1 and im so frustrated it just logged me out and then I clicked back on it and it gave me a dif problem >:( I can't stand technology sometimes !!

@sleepyjess I was almost there I was working out if he was 55 lol

Answer 69

I was just starting with a low and a high number and going from there

Answer 70

okay next problem: (thank you so much for helping meee ) :)
this one seems a little easier:

William is 4 times as old as Ashley and is also 27 years older than Ashley.

How old is William?

Answer 71

W=4A
OR
W-27=A

Answer 72

We know that William has to be at least 27

Answer 73

yep

Answer 74

Lets try A is 7
W=4(7)
W=28
nope

9?
W=4(9)
W=36
36-27=9

WHOOOOOO HOOOOO

Answer 75

Wow u r really good at these!

Answer 76

just trial and error \(\huge\color{goldenrod}{\ddot\smile}\)

Answer 77

math is usually my best subject but i just can't seen to work these out as fast as you holy cow !!! so isn't 9 how old ashley is?

Answer 78

Why are there so many people watching this question?

Answer 79

yes ashley is 9 but you want the age of william which is 36

Answer 80

okay fwew thats what i thought thank you !!

Answer 81

it was CORRECT !! wooohoooo lets keep going thank you thank you thank you !!!

Answer 82

YAY!!!!

Answer 83

brb

Answer 84

Umaima is 26 years old and Michael is 4 years old.

How many years will it take until Umaima is only 3 times as old as Michael?

@sleepyjess k see un in a min.

Answer 85

Hey I would love to help with the rest but I REALLY need help on my math so I'll post my question and come back when it's answered

Answer 86

ok thats fine !!

Answer 87

Ok i back

Answer 88

This one is really just trial and error. I don't know how to make a formula for this so lets just try numbers. I have already done up to Michael being 12 in my head.

Answer 89

\(\huge\ddot\smile\)

Answer 90

Wait let me try 11
m=11
11-4=7 years
26+7=33
11*3=33

YAY!

Answer 91

I think Michael would be 11 when Umaima was was 33 so that is what age they are when he is 3x as old, so 11-4= 7, so it took 7 years for umaima to be 3x as old as michael ,,, do you agree?

Answer 92

i submitted it and we ............ GOT IT RIGHT !!! WOOOO lol xD

Answer 93

ohhh no its another one of those hard ones xD (well kinda hard) :

Stephanie is 24 years younger than Kevin. Six years ago, Kevin was 4 times as old as Stephanie.

How old is Kevin now?

Answer 94

k-24=s
k-6= (s-6) * 4
I think thats the right formula?

Answer 95

S=K-24
S-6=(K-6)*4