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
nataly862011 [7]
2 years ago
6

Remi has $8.40 in a jar that contains only nickels and dimes. There are 108 coins in the jar. How many nickles are in the jar

Mathematics
2 answers:
Ivanshal [37]2 years ago
5 0
There are 21 nickles
Anit [1.1K]2 years ago
4 0
There are 21 nickles in the jar.
You might be interested in
A rectangular piece of metal is 20 in longer than it is wide. Squares with sides 4 in long are cut from the four corners and the
Misha Larkins [42]

Answer:

Step-by-step explanation:

This is good!  The length of the metal is 20 inches longer than the width.  But we fold up 4-inch flaps on each side, so the height of the box is 4 inches, and the length and width will each decrease by 8 inches (4 inches on each side).  Since the length and width decrease by the same amount, the length will still be 20 inches longer than the width.  So the equations would be:

l = w + 20

vol = l x w x h = 1716 in3

1716 = (w + 20)(w)(4)

1716 = 4w2 + 80w

4w2 + 80w - 1716 = 0

4(w2 + 20w - 429) = 0

4(w + 33)(w - 13) = 0

w + 33 = 0, so w = -33

w - 13 = 0, so w = 13

Since the width can't be negative, the width of the box is 13 and the length is 33 (13 + 20).

But remember, the length and width of the piece of metal are each 8 inches longer than the box, so it was 41 inches by 21 inches.

7 0
3 years ago
There are 2.54 centimeters in an inch how many inches are in 51.78 centimeters round to the nearest tenths
erik [133]
2.54 cm in 1 inch......how many inches in 51.78 cm...

51.78 / 2.54 = 20.4 inches <==

or this way...
2.54 / 1 = 51.78 / x....2.54 cm to 1 in = 51.78 cm to x inches
cross multiply
(2.54)(x) = 51.78)(1)
2.54x = 51.78
x = 51.78 / 2.54
x = 20.4 inches <==
3 0
3 years ago
A student says that if 5x2 = 20, then x must be
lutik1710 [3]

Answer:

I agree with the student's answer. "x" cannot be -2 because then it would make -20 which is not equal to 20:

5(-2)(2) = ?

-10 x 2 = ?

? = -20

-20 ≠ 20

Step-by-step explanation:

Justificaiton:

5(x)(2) = 20

10(x) = 20

10/10(x) = 20/10

x = 2

Second Justification:

5(x)(2) = 20

5/5(x)(2) = 20/5

2x = 4

2x/2 = 4/2

x = 2

4 0
2 years ago
6+9=?<img src="https://tex.z-dn.net/?f=6x%5E%7B2%7D%20%2B7x-9%3D" id="TexFormula1" title="6x^{2} +7x-9=" alt="6x^{2} +7x-9=" ali
ELEN [110]

Answer:

are u sure thet write the question right?

4 0
2 years ago
15 more than the absolute value of a number. Someone help please
Scrat [10]
The Expression:

|n| + 15
3 0
2 years ago
Other questions:
  • A sales representative was paid a base salary of $77 per week. He was also paid a commission of 11 percent on everything he sold
    14·1 answer
  • A 5-card hand is dealt from a deck of 52 cards. what is the probability that 4 are hearts
    5·1 answer
  • You borrow $350 from a friend the first week and pay the friend back $25 week thereafter
    7·2 answers
  • Cars are made in a factory at a rate of 39 cars every 3hours at this rate, how many cars can be made on the factory in 7 hours
    8·1 answer
  • A dripping faucet loses about 2.5×10^−4 litres of water each minute. There are approximately 3×10^5 minutes in a month.
    6·2 answers
  • What is the geometric mean of 5 and 18?
    11·2 answers
  • Plz help me with this
    5·1 answer
  • Alexa is saving to buy a new bike that costs $265. So far she has saved $45. If she is able to save $11 each week, how many week
    11·1 answer
  • Please help <br> What is x=
    15·1 answer
  • The coordinates for one vertex of a rectangle are (1. 25,1). The length of the rectangle is 2. 5 units, and the width of the rec
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!