Question

help!

Answer 1

@Loser66

Answer 2

Craig wants to use an elevator to carry identical packages having the same weight. Each package weighs 4 pounds and Craig weighs 90 pounds. If the elevator can carry a maximum of 330 pounds at a time, which inequality shows the maximum number of packages, n, that Craig can carry with himself in the elevator if he is the only passenger?

n ≥ 60
n ≤ 60
n ≤ 236
n ≥ 236

Answer 3

@Loser66

Answer 4

@Vocaloid

Answer 5

The maximum amount of weight allowed in the elevator is 330.
This means that
\[4x+90\le330\]
Where x is the amount of packages.
All you have to do is solve for x, and there's your answer!

Answer 6

x=60?

Answer 7

b?

Answer 8

Yes

Answer 9

@Vocaloid is b correct?

Answer 10

yes

Answer 11

ok :)

Answer 12

What is the first step needed to solve 3 over 4 multiplied by x minus 3 equals negative 18?

Add 3 to both sides
Subtract 18 from both sides
Multiply both sides by 3
Divide both sides by 4

Answer 13

a?

Answer 14

hmm,,,

(3/4)x - 3 = -18
I guess I would add 3 to both sides first to get x by itself

Answer 15

okay :)

Answer 16

Brent has two barcode printing machines. Each machine can print 25 barcodes per minute. On day 1, only the first machine was used, and it printed 95 barcodes. On the following day, the first machine printed for x minutes and the second machine printed for y minutes. Which expression shows the total number of barcodes printed by both machines during these two days?

95 + 25x + 25y
120x + 25y
25 + 95x + y
95x + 50y

Answer 17

A?

Answer 18

@Vocaloid

Answer 19

number of barcodes printed on day 1 + (number of barcodes per minute)x + (number of barcodes per minute)y

Answer 20

http://openstudy.com/study#/updates/55e3a8fce4b03567e11074e8

Answer 21

right A :)

Answer 22

Select True or False.

The expression 3x − 4(2x − 5) is equivalent to the expression 20 − 5x.

True
False

Answer 23

sorry but please click on the lnk below @Vocaloid http://openstudy.com/study#/updates/55e3a8fce4b03567e11074e8

Answer 24

well, start by distributing the 4

Answer 25

-5x + 20, so false ?

Answer 26

yup, that's correct, good job

Answer 27

Bruno bought 96 pounds of sugar for his bakery. Every day he used the same amount of sugar to make bakery items. After 10 days, Bruno was left with 15.2 pounds of sugar. On average, how many pounds of sugar did Bruno use each day?

5.60 pounds
8.08 pounds
11.12 pounds
18.46 pounds

Answer 28

well, he started off with 96 pounds and he had 15.2 left, how much did he use up?

Answer 29

80.8

Answer 30

b?

Answer 31

yup

Answer 32

The sum of three consecutive numbers is 84. What is the largest of these numbers?

26
27
28
29

Answer 33

"consecutive" means three numbers that increase by 1 each time, so we have

x
x + 1
x + 1 + 1

add them together, and set them equal to 84

x + x + 1 + x + 1 + 1 = 84

first step is to solve for x

Answer 34

x=27

Answer 35

right, now find x + 1 + 1

Answer 36

x + 2

Answer 37

now plug in your x value

Answer 38

x = 27, x + 2 = ?

Answer 39

um help me with this one

Answer 40

well, ok, you solved the equation I gave you and got x = 27. this means we can replace "x" with "27" whenever we see x

so, if x = 27, then x + 2 = ?

Answer 41

oh so...
27 = 27 and 27 + 2

Answer 42

yup, so x + 2 = 27 + 2 = 29, and 29 is your answer

Answer 43

oh i get it ..okie dokie :))

Answer 44

Lara has violet and blue pansies in groups of 5. She has x groups of violet pansies and y groups of blue pansies. Which expression shows the total number of pansies that Lara has?

5x + y
5x + 5y
x + 5y
x over 5 + y over 5

Answer 45

well, we'll use multiplication

there are 5 pansies in 1 group of pansies, so there are 5x pansies in 5 groups of pansies

Answer 46

ok

Answer 47

soo??

Answer 48

there are x groups of violet pansies, and y groups of blue pansies, and 5 pansies in each group, giving us 5x and 5y... now add them...

Answer 49

a?

Answer 50

nope, remember, 5x and 5y...

Answer 51

b

Answer 52

correct

Answer 53

Which unit rate is the lowest price per ounce?

Choice A: 6 ounces of raisins for $1.49
Choice B: 13 ounces of raisins for $3.59

Choice A
Choice B
The unit rates are equal.
The unit rates cannot be determined.

Answer 54

divide cost by number of ounces, then see whether choice A or B is bigger

Answer 55

A is bigger

Answer 56

oh wait, for the other problem, it wants the smaller one, so it would be choice B

Answer 57

oh okay! :)

Answer 58

anyway, for the graph problem, a proportional relationship just means it will be a straight line starting from (0,0)

Answer 59

c?

Answer 60

c?

Answer 61

yeah, c, sorry I got distracted a bit

Answer 62

its okay.. lol :)

Answer 63

@Vocaloid

Answer 64

for each of the rows, calculate how much 1 cupcake costs

if the cost is the same each time, then the relationship is proportional

Answer 65

how do i calculate

Answer 66

well, just look at row 1

if 3 cupcakes cost 12, then how much does 1 cost?

Answer 67

12

Answer 68

oh i mean $4

Answer 69

right, now keep going for each of the other rows in the table

Answer 70

they are all 4

Answer 71

good, that means the relationship is proportional, and the price of the cupcakes is 4 times the number of cupcakes

Answer 72

now look at the answer choices

Answer 73

A

Answer 74

nope, read carefully

Answer 75

the relationship is proportional, and the price of the cupcakes is 4 times the number of cupcakes

Answer 76

b

Answer 77

right

Answer 78

well, x-axis = number of tables and y-axis = number of chairs, so what do you think (1,4) means?

Answer 79

A?

Answer 80

correct

Answer 81

@Vocaloid

Answer 82

well, read the graph, and tell em how many cups of cherry juice there are for 1 cup of lime soda

Answer 83

c?

Answer 84

nope, just look at the graph and tell me how many cups of cherry juice for ONE cup of lime soda

Answer 85

4

Answer 86

read the graph carefully...

Answer 87

lemon-lime soda = 1
cherry juice = ?

Answer 88

i dont get it :(

Answer 89

read the graph carefully

when lemon-soda = 1, what does cherry juice = ?

Answer 90

lemon soda is the x, cherry juice is y...

Answer 91

5