Question

help!

Answer 1

@Michele_Laino

Answer 2

Remo needs to buy a countertop for a bathroom. He calculated the area as 10 square feet. The actual area is 9.5 square feet. What is Remo's percentage error?

0.5%
0.95%
5%
5.26%

Answer 3

by definition, the percentage error, is:
\[\large \frac{{10 - 9.5}}{{9.5}} \cdot 100 = ...?\]

Answer 4

90

Answer 5

I'm sorry, it is wrong

Answer 6

5.26315789474

Answer 7

D?

Answer 8

correct!
5.26%

Answer 9

here is the general definition, for percentage error \epsilon:
\[\Large \varepsilon = \frac{{{\text{measured value}} - {\text{actual value}}}}{{{\text{actual}}\;{\text{value}}}} \cdot 100\]

Answer 10

the requested unit rate is:
space/time, namely:
\[\huge r = \frac{{3/8}}{{3/5}} = \frac{3}{8} \cdot \frac{5}{3} = ...?\]

Answer 11

15 / 24

Answer 12

you can simplify your fraction please

Answer 13

5/8

Answer 14

correct!

Answer 15

A?

Answer 16

yes!

Answer 17

A package of pencils cost $6.25 per set at an office supply store. Which equation can be used to determine the price, P, of n sets of these pencils?

n = 6.25P
P = 6.25n
n equals 6.25 over P
P equals 6.25 over n

Answer 18

total cost for n set is:
cost for one set multiplied by the number of set

Answer 19

b?

Answer 20

correct!

Answer 21

An oil company fills 1 over 12 of a tank in 1 over 4 hour with gasoline. At this rate, which expression can be used to determine how long will it take for the tank to fill completely?

1 over 4 ⋅ 1 over 12
1 over 12 ⋅ 4
1 over 4 ⋅ 12
12 ⋅ 4
@Michele_Laino

Answer 22

the filling rate r is:
\[\Large r = \frac{{1/12}}{{1/4}} = \frac{1}{{12}} \cdot \frac{4}{1} = ...?\]

Answer 23

4/12 which can be simplified to 1/4

Answer 24

4/12 which can be simplified to 1/3

Answer 25

oh sorry its 1/3

Answer 26

that means I am able to fill 1 tank every 3 hours, right?

Answer 27

right

Answer 28

so what is the right option?

Answer 29

c?

Answer 30

correct!

Answer 31

Which unit rate is equivalent to 19 miles per gallon?

three gallons over fifty seven miles
fifty seven miles over three gallons
thirty seven miles over four gallons
four gallons over thirty seven miles

Answer 32

hint:
\[\Large \frac{{19}}{1} = \frac{{19 \times 3}}{{1 \times 3}} = ...?\]

Answer 33

57/3

Answer 34

@Michele_Laino

Answer 35

b?

Answer 36

correct!

Answer 37

b?

Answer 38

correct!

Answer 39

true?

Answer 40

hint:
\[\Large \begin{gathered}
8 = 2 \cdot 4 \hfill \\
12 = 3 \cdot 4 \hfill \\
16 = 4 \cdot 4 \hfill \\
20 = 5 \cdot 4 \hfill \\
\end{gathered} \]

Answer 41

8
12
16
20

Answer 42

I know, lol

Answer 43

oh ok

Answer 44

are those numbers proportional each to others?

Answer 45

yes

Answer 46

so, what is the right option?

Answer 47

true

Answer 48

that's right!

Answer 49

hint:
(0,0) means that 0 fine is due if the DVD is returned by the due date

Answer 50

c?

Answer 51

yes!

Answer 52

Silva set up a dog-walking business. He earned $60 in June. He is projected to earn 110% more in July. How much is Silva projected to make in July?

$126
$170
$176
$660

Answer 53

it is simple, the requested amount of money is:
\[\Large 60 + \left( {\frac{{110}}{{100}} \cdot 60} \right) = ...?\]

Answer 54

i got A

Answer 55

that's right!