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
dalvyx [7]
3 years ago
9

Lily saved 16 coins. She saved ten-can and one-dollar coins only. If she had $5.20, how many ten-cent coins did she have?

Mathematics
1 answer:
Firlakuza [10]3 years ago
4 0

Answer:

  12

Step-by-step explanation:

Let d represent the number of dimes Lily saved. Then the value of her coins in cents is ...

  10d +100(16-d) = 520

  -90d +1600 = 520 . . . . . eliminate parentheses, collect terms

  -90d = -1080 . . . . . . . . . . subtract 1600

  d = -1080/-90 = 12 . . . . . divide by the coefficient of d

Lily has 12 ten-cent coins.

You might be interested in
If 2x+5=12 for some value of X,then what does 6x+20 equal
Arte-miy333 [17]
2x+5=12
2x=7
x=3.5
3.5*6=21
21+20=41

Hope this helps :)
4 0
3 years ago
Read 2 more answers
A kite with a string 100 feet long makes an angle of elevation of 50° with the ground, assuming the string is straight, how high
erik [133]
Sin(θ)=o/h
sin(50)=x/100
.76604*100=x=76.604
4 0
3 years ago
A politician claims that a proposal for a new traffic law is broadly supported by both political parties and that a person from
Mashutka [201]

Answer:

Based on the 95% confidence interval for the difference in population proportion, there is convincing statistical evidence that he is correct

Step-by-step explanation:

The proportion from the sample of people from his party that support the law = 70%

The number the members of the politicians political party that support the law = 550 people

The proportion from the sample of people from the other party that support the law = 65%

The number the members of the politicians political party that support the law = 420 people

The confidence level of the test = 95%

The given confidence interval for the difference in proportion, C.I. = (-0.010, 0.110)

Given that the 95% confidence interval for the difference in population proportion ranges from -0.010, to 0.110, it is 95% certain that 0 is among the likely difference in proportion between the two populations and therefore, there is sufficient statistical evidence to suggest that there is no difference in the proportion of the members of either political that support the proposed new traffic law.

4 0
2 years ago
If you are on a ship at sea navigating to a point that is 300 miles north and 400 miles west, find the distance from tour ship t
s344n2d4d5 [400]

Answer:

\huge \boxed{\mathrm{500 \ miles}}

Step-by-step explanation:

A right triangle is formed.

300 miles and 400 miles are the legs of the triangle.

We can apply Pythagorean theorem.

c=\sqrt{300^2 +400^2 }

c=\sqrt{90000 +160000}

c=\sqrt{250000}

c=500

8 0
2 years ago
What is 50 times 50<br> i realy need help on this and plz help me on this
Shalnov [3]

Hello There!

50*50 is 2,500

4 0
2 years ago
Read 2 more answers
Other questions:
  • Which postulate can be used to prove that the triangles are congruent?
    11·1 answer
  • A publishing company produces 15 books in 3 hours. How long would it take to produce 20 books at the same rate?
    14·2 answers
  • 300,000+5,000+80+8· 1/100 +9· 1/10,000
    10·2 answers
  • Marnie and Judy hit a total of 12 home runs this season. Judy hit 6 more than Marnie. How many home runs did Judy hit?
    6·1 answer
  • I need all the answers
    5·1 answer
  • Ellie practices piano 2/3 h per day, several days each week. She practiced piano 32 2/3 hours during the summer.
    8·1 answer
  • Can you form a right triangle with the three lengths given? Why or why not?
    10·1 answer
  • What's the solution to 3x – 6 &lt; 3x + 13? A) x &gt; 5 B) All real numbers C) There are no solutions. D) x &lt; –5
    6·1 answer
  • WILL MARK BRAINLIEST TO THE FIRST PERSON
    11·2 answers
  • Macy's department store just had a huge sale and now needs to increase the price of all retail by 13%. What will be the price of
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!