1answer.
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
Leona [35]
3 years ago
7

The jar only contains nickels and dimes altogether there are 10 coins total of the value is 90 cents how many nickels and how ma

ny dimes are there in the jar
Mathematics
1 answer:
lilavasa [31]3 years ago
3 0
Write a system of equations and solve.

x + y = 10
5x + 10y = 90

Multiply and combine equations

-5x - 5y = -50
5x + 10y = 90
------------------
5y = 40
y = 8
x = 2

There are 2 nickels and 8 dimes in the jar. Hope this helps! :)
You might be interested in
g Nationwide, a certain disease occurs only a small proportion of people (.000215). A certain town has 74,000 residents. Use the
Andrei [34K]

Answer:

The probability that the town has 30 or fewer residents with the illness = 0.00052.

Step-by-step explanation:

So, we have the following set of data or information or parameters given from the question above and they are; the number of people living in that particular society/community/town = 74,000 residents and the proportion of people that the diseases affected = .000215.

The first step to do is to determine the expected number of people with disease. Thus, the expected number of people with disease = 74,000 × .000215 = 15.91.

Hence, the probability that the town has 30 or fewer residents with the illness = 1.23 × 10^-7 × 15.91^30/ 2.65253 × 10^-32 = 0.00052.

Note the formula used in the calculating the probability that the town has 30 or fewer residents with the illness =  e^-λ × λ^x/ x!

8 0
3 years ago
* WILL GIVE BRAINIEST*
k0ka [10]

Answer:

B: 280

Step-by-step explanation:

The regression line predicts that when x equals 5:

log_{10}(y) = 2.447

In order to find the value for y, one must simply apply the following logarithmic property:

if : log_{b}(a) = c

then: b^c = a

Applying it to this particular problem:

log_{10}(y) = 2.2447\\10^{2.447}= y\\y=280

Therefore, the regression line predicts y will equal 280 when x equals 5.

3 0
3 years ago
Drag the slider to 2 inches. How many centimeters are in 2 inches? There are centimeters in 2 inches.
choli [55]

Answer: 5


Step-by-step explanation: There are 2.5 cm per in, so its just 2.5*2


4 0
3 years ago
Read 2 more answers
There are 8 pencils in a package. How many packages will be needed for 28 children if each child gets 4 pencils?
Verizon [17]
28*4=112
112/8=14 Packages
8 0
3 years ago
What is the solution of the inequality y ≤ x - 1 ?
Crazy boy [7]

Answer:

no i cant help

Step-by-step explanation:

i just need points

7 0
3 years ago
Other questions:
  • Please help me with this question
    7·1 answer
  • Factor the equation <br> 5x^2+60x+160
    6·1 answer
  • What is the long division Answer for 8639 ÷ 5?
    8·1 answer
  • What is the probability of randomly selecting an odd number from the numbers 1 -15?
    11·2 answers
  • What is the slope of the line containing the points (-6,1) and (5,3)
    6·1 answer
  • Find m<br> A. 12<br><br> B. 22 <br><br> C. 52<br><br> D. 38
    8·1 answer
  • Which graph represents the equation y − 6 = -(x − 4)?
    9·2 answers
  • Solve for x: x/3 = -48
    8·2 answers
  • In his free time, Gary spends 7 hours per week on the Internet and 8 hours per week playing video games. If Gary has five hours
    15·1 answer
  • 4 times 2 1/8 mixed number in simpileest form
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!