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
alexgriva [62]
3 years ago
14

Blake has some quarters and dimes. He has 20 coins worth a total of $2.90. How many of each type of coin does he have?

Mathematics
2 answers:
Veronika [31]3 years ago
6 0
Q=number of quarters
d=number of dimes

so the value of 1 quarter=0.25 and 1 dime=0.10 so therefor the total value would be
0.25q+0.1d=2.9

total number of coins=20
q+d=20

solve
we have
0.25q+0.1d=2.9 and
q+d=20
multiply the first equation by 10
2.5q+1d=29

so we have
q+d=20
2.5q+d=29

multiply first by -1 and add
-q-d=-20
<u>2.5q+d=29  +
</u>1.5q+0d=9
1.5q=9
multipliy both sides by 2
3q=18
divide by 3
q=6
subsitute
q+d=20
6+d=20
ubtract 6
d=14

14 dimes
6 quarters
<u />
Marysya12 [62]3 years ago
5 0
6 quarters
14 dimes
This took me 20 minutes to solve... :))
You might be interested in
Rewrite x^5+5r^3-9r+1 in the form q(x)+r(x)/b(x). What is q(x)?
Alex787 [66]

Answer:

a is the correct answer

Step-by-step explanation:


7 0
3 years ago
There are 7 red candies in a pack, 9 blue candies in a pack, and 12 pink candies in a pack. If your wonderful math teacher wants
pentagon [3]
Given:
7 red candies
9 blue candies
12 pink candies

Condition:
Number of bags that has equal number of candies.

We can do 7 bags with 1 colored candy each. There will be an excess of 2 blue candies and 5 pink candies.

We can do 4 bags with 1 red candy, 2 blue candies, 3 pink candies. There will be an excess of 3 red candies and 1 blue candy.

We can do 3 bags with 2 red candies, 3 blue candies, 4 pink candies. There will be an excess of 1 red candy.
5 0
3 years ago
A pile of cards contains 3 diamonds,
Shtirlitz [24]

Answer:G

Step-by-step explanation:

4/9 times 2/8= 1/9

6 0
2 years ago
Read 2 more answers
Help plzzzzzzzzzzzzzzzzzzzz
bulgar [2K]

Answer:

y = -4

Step-by-step explanation:

First, let's find the slope. Since the line is horizontal, it's slope has to be 0 (this is because slope = rise/run, there is no "rise" in a horizontal line therefore the slope is 0)

Now, we need to find the y-intercept. This is where the line intercepts the y-axis. Looking at the graph, the line intercepts the axis at (0,-4), therefore the y-intercept is -4.

The equation would be:

y=0x-4

y=-4

5 0
2 years ago
Collins is working.......
lesya [120]
Let n represent the amount Colin earned on Sunday.

On Sat. he earned n/2; on Sun. he earned n; and on Friday he earned (1/2)(n/2).

Then n/2  +  n  + n/4 = $70

Mult. all terms by 4 to eliminate fractions:

2n + 4n + n = $280

7n = $280  =>  n = $40

Colin earned n/2, or $20, on Saturday; n, or $40, on Sunday; and n/4, or $10, on Friday.

Note that $20 and $40 and $10 add up to $70, as they must.
4 0
3 years ago
Other questions:
  • a cookbook has dimensions 12cm by 16cm. what scale factor should be used to make an enlarged version that has dimensions 21cm by
    15·2 answers
  • Is |-x|=-|x| always, sometimes, or never true?
    10·1 answer
  • What is the negation of the following statement: "I exercise and I feel tired."
    9·2 answers
  • What is the degree measurement of five thirds of a right angle
    5·1 answer
  • Explain how to value of the 7 in 327,902 will change if you move it to the tens place
    5·2 answers
  • Use the distributive property to multiply 34x6 , 16x9 , 27x8
    13·1 answer
  • Please answer correctly !!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!
    8·1 answer
  • At Peyton's store, she sells blue shoes for $39.00 a pair and red shoes for $34.30 a pair. Peyton has already sold four pairs of
    6·1 answer
  • 1/3 + 1/9 need help fast help
    6·2 answers
  • jamie deposits $900 into a savings account that pays 2% interest. if he leaves the money in the account for 3 years, how much in
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!