Question

i need some help please

Answer 1

@Vocaloid

Answer 2

in general

% error = 100*(actual-predicted)/predicted

Answer 3

this can get a bit fuzzy because some teachers want you to report either positive or negative percentages while some want only positive percentages

Answer 4

uh...i'm confused still..

Answer 5

just start by plugging the numbers into this % error = 100*(actual-predicted)/predicted

Answer 6

so 100*(5 1/2)/ 6 7/8?

Answer 7

keep in mind the numerator is (actual - predicted) not just actual

Answer 8

\[\frac{ 5\frac{ 1 }{ 2 }-6\frac{ 7 }{ 8 } }{ 6\frac{ 7 }{ 8 } }*100\]

Answer 9

-20?

Answer 10

good

after doing a bit of research it seems like most people agree that percent error should be positive, so you would just take the absolute value of -20 to get 20 as the solution

Answer 11

so just 20

Answer 12

yes

Answer 13

says it's incorrect.

Answer 14

.. oh? does -20 work?

Answer 15

no..

Answer 16

...

Answer 17

hm :/ wouldn't know what it would be besides those two options

do they give you a different formula?

Answer 18

not at all, though i just simplified the equation

Answer 19

strange. I can ask for another opinion but it's probably an error with the system/answer key

if you have other questions I'd be happy to help

Answer 20

i do, but they might not be the ones you can answer

Answer 21

oh. well, it doesn't really hurt to post, either I or someone else might take a look

Answer 22

oh, I would just calculate 6.2% of 47,000 and 1.45% of 47,000 and then just add the results together, however i don't know if the problem is that simple

Answer 23

3595.5

Answer 24

yeah that's what I got as a tentative solution, I wouldn't try unless you have multiple attempts left

Answer 25

technically 0.075 rounds up to 0.08 not 0.07 so just change the last digit to an 8

Answer 26

now this one is just strange

Answer 27

the answer is 7 but...

Answer 28

it's possible that the source material for this question is outdated. hm.

Answer 29

i'm thinking it's eight

Answer 30

wait, it cant be since the source is from 2018

Answer 31

I wouldn't really know either way so go with your best instinct

Answer 32

I ***Believe*** you would just subtract 1377 minus the federal, state, and FICA tax

Answer 33

so just subtract 1337 with the taxes

Answer 34

yes

Answer 35

so it's 7.65% of this number?

Answer 36

so 83.82?

Answer 37

nah, the FICA tax is taken from the original income

so 1377 - 41.31 - 200 - (7.65/100)*1377

Answer 38

1030.34?

Answer 39

.35 after rounding but yes

Answer 40

it wants the least amount of tax, so you'd use the least income possible (24,000)

so just calculate (6.2 + 1.45)% of 24,000

Answer 41

actually yeah that's how you'd do it, proceed

Answer 42

1836

Answer 43

that it?

Answer 44

yea

Answer 45

good

Answer 46

quick google search tells me sales tax is considered regressive because it is a larger share of income at lower-income brackets

https://investinganswers.com/financial-dictionary/tax-center/sales-tax-1533

Answer 47

if your notes/textbook/whatever says its progressive then go with progressive

Answer 48

good

Answer 49

quick search tells me that should be good

Answer 50

order is important, "quotient of z and 9" means z/9 because z comes first

Answer 51

good attempt but it wants 2 consecutive odd integers

if you just add 1 to an odd integer you'll get an even integer

so to turn odd integer n into the next highest odd integer, you gotta add 2 to get n + 2

Answer 52

so bottom left

Answer 53

yes

Answer 54

following the logic from the previous problem

if an even integer is x, the next consecutive even integer is (x+2) not 2x

Answer 55

bottom right again?

Answer 56

there's no 2x term, it's just
first even integer = x
second even integer = x + 2

x + (x+2) = 42

Answer 57

well you'd want to somehow get "x" by itself, the first obstacle is the +10 standing in the way
so do the opposite of + 10

Answer 58

so subtract

Answer 59

exactly, you'd just subtract 10

Answer 60

let x be the original # of high school seniors

"1/12 of the seniors signed up for debate" so start with (1/12)x
"7 seniors quit" so subtract 7
"leaving 18"

so putting it all together

(1/12)x - 7 = 18
solve for x

Answer 61

300

Answer 62

good

Answer 63

might have made a mistake with your equation somewhere

let x = Jimmy's dollars
x + 7 = Tom's dollars

x + (x+7) = 71

it wants tom's dollars so solve for x, then find (x+7)

Answer 64

i subtracted 7 from the original and divided by 2

Answer 65

i got 64, and half that is 42

Answer 66

add 7 and that's 49

Answer 67

right?

Answer 68

71 - 7 = 64
64/2 = 32
32 + 7 = 39 not 49

Answer 69

i just realized my mistake,

Answer 70

20 won't work because 20 is not a multiple of 12

start listing out multiples of 12 and stop when you get a multiple that is divisible by both 2 and 5

Answer 71

60?

Answer 72

perfect, so 60 is your sol'n

Answer 73

good

Answer 74

we'll need two equations, one for the total # of coins and one for the total $$$

let p = num. of pennies and d = num. of dimes
"twice as many dimes as pennies" so d = 2p

"total value of 2.31"
so (0.01)p + (0.10)d = 2.31, since obv. a penny is 0.01 of a dollar and a dime is 0.10 of a dollar

Answer 75

since we know that d = 2p, we can replace "d" with "2p" in the second equation, therefore

(0.01)p + (0.10)d = 2.31
becomes
(0.01)p + (0.10)(2p) = 2.31
at this point you can solve for p

the question, however, asks for dimes, so you just have to double the number of pennies to get dimes

Answer 76

22?

Answer 77

good

Answer 78

well you have a -4, right? so what can you add to "eliminate" it?

Answer 79

positive 4?

Answer 80

wait or is it a negative?

Answer 81

well, if we subtracted -4 we would just get m-8=14 which doesn't help

but if we add 4 to both sides we get

m = 22 which solves the equation

so adding positive 4 is the best course of action here

Answer 82

notice you have

7 = -13 + d

if we "take away" the -13 we would just get d by itself on the right side

so you can subtract -13

Answer 83

3c = 9

we want "c" by itself, so we have to "undo" the multiplication by 3

the opposite of multiplication is, of course, division, so you can just divide both sides by 3 to get c by itself

Answer 84

would that still be 3 though?

Answer 85

good, 9/3 = 3

Answer 86

as a shortcut method if you have a situation like this you can switch the number on the left with the denominator

in other words, you can switch a and c and the equation still holds

Answer 87

bottom left?

Answer 88

good

Answer 89

P = 2L + 2W
you're given P= 26 and L = 12, plug in, solve for W

Answer 90

1?

Answer 91

good

Answer 92

good

Answer 93

good

Answer 94

good