answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
klemol [59]
1 year ago
7

When Jeremy made 8 black and white copies and 2 color copies at a copy shop, the cost was $1.20. When he made 10 black and white

copies and 10 color copies, the cost was $3.00. How much do black and white copies cost?
A. $0.10
B. $0.15
C. $0.20
D. $0.30 ​
Mathematics
1 answer:
marshall27 [118]1 year ago
5 0
I think it’s A and it’s B at the most but still...A
You might be interested in
500 grams of tomatoes cost £1.76 how much will 1.75kg cost??
ValentinkaMS [17]
500 grams equals 0.50 kg so multiply 1.76 3 times to get 5.28, then divide 1.76 by 2 to get .88 add the two together to get 6.16
3 0
1 year ago
A test is conducted to compare the tread wear of certain type of tires on highways paved with asphalt and highways paved with co
zimovet [89]

Answer:

Yes it does

Step-by-step explanation:

We can use two sample t-test to draw the conclusuion. However, by looking at the information of mileage of tyres on asphalt and concrete-paved highways, we can say that since mean milege of tyres on concrete is lesser, tyres wear faster on concrete-paved highways.

4 0
1 year ago
You work two jobs. You earn $11.90 per hour as a salesperson and $10.50 per hour stocking shelves. Your combined earnings this m
Delicious77 [7]
178.50 = 11.90y + 10.50x ⇒ equation in standard form.

4 0
2 years ago
An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. In an earlier s
anyanavicka [17]

Answer:

1,496 new car buyers

Step-by-step explanation:

The sample size n in Simple Random Sampling is given by

\bf n=\frac{z^2p(1-p)}{e^2}

where  

z = 1.645 is the critical value for a 90% confidence level (*)

p= 0.33 is the population proportion.

e = 0.02 is the margin of error

so  

\bf n=\frac{(1.645)^20.33*0.67}{0.02^2}=1,495.76\approx 1,496

<em>(*)</em><em>This is a point z such that the area under the Normal curve N(0,1) inside the interval [-z, z] equals 90% = 0.9</em>

It can be obtained in Excel or OpenOffice Calc with

<em>NORMSINV(0.95)</em>

6 0
1 year ago
Tasha has eight more fish than Oscar, who has twice as many fish as Cecilia. If altogether they have 148 fish, how many fish do
Viefleur [7K]

Answer:

They each have 64

Step-by-step explanation:

let C = number of fish that Cecilia has --- then, O = 2C, where O = number of fish that Oscar has --- and T = O + 8 = 2C + 8, where T = number of fish that Tasha has --- then, C + O + T = C + 2C + (2C + 8) = 148 --- or, 5C + 8 = 148 --- or, 5C = 140 --- or, C = 140/5 = 28 --- and, O = 2C = 2(28) = 56 --- and, T = O + 8 = 56 + 8 = 64

7 0
2 years ago
Other questions:
  • A cooking teacher needs to give each student in his class three eggs to use in a recipe. There are 44 students in the class. How
    11·2 answers
  • Which identity could be used to rewrite the expression x^4-100?
    7·2 answers
  • Monique planted seeds to grow pansies, Snapdragons, and petunias. After several weeks, 18 out of 40 pansy seeds, 21 out of 50 sn
    7·2 answers
  • An object is launched into the air. The projectile motion of the object can be modeled using the function h(t) = –16t2 + 72t + 5
    6·1 answer
  • The submarine dove 150 feet from periscope height to an elevation of 200 feet below sea level. Which point is a representation o
    5·2 answers
  • A candlestick contains 5 pounds of silver. Suppose silver is worth $15 per ounce.
    12·1 answer
  • Rewrite in simplest radical form x 5/6 x 1/6
    10·1 answer
  • The aquarium at Sea Critters Depot contains 140 fish. Eighty of these fish are green swordtails (44 female and 36 male) and 60 a
    9·1 answer
  • Which rules of exponents will be used to evaluate this expression? Check all that apply. StartFraction left-brace (negative 8) S
    12·1 answer
  • Which of the following completes the proof?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!