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
Amiraneli [1.4K]
3 years ago
12

There are 7 more quarters than nickels. If there is a total of $ 2.65 in coins, how many quarters are there?

Mathematics
1 answer:
Solnce55 [7]3 years ago
5 0

o=nickel

O=quarter

O O O O O O O O O O + o o o =2.65

(2.50+.15=2.65)

there are 10 quarters total, and 3 nickels

You might be interested in
Work out the difference between 77.5 and 2.27​
Nadusha1986 [10]

77.5-2.27 is equal to 75.23

hope it helps

7 0
3 years ago
Read 2 more answers
Which is a statement accepted without proof?
Anastaziya [24]

Answer:

Postulate

Step-by-step explanation:

An axiom or postulate is a statement that is accepted without proof and regarded as fundamental to a subject.

5 0
3 years ago
A pharmacist wants to mix a 30% saline solution with a 10% saline solution to get 200 mL of a 12% saline solution. How much of e
Bess [88]

Answer:

30% constituents=20 mL

10% constituents=180 mL

Step-by-step explanation:

x= 30% volume

y=10% volume

For our first equation, we know the total volume is 200 mL and is the sum

x+y=200

y=200-x (1)

For our second equation, we do a mass balance for 200 mL of final solution.

12% w/v = 0.12 g/mL

This means that in 1 mL of solution, we have 0.12 g of NaCl.

For any solution, concentration multiplied by volume will give the mass of NaCl:

Mass in x mL= C*V (g/mL) (mL)

So in 200 mL, we have

0.12*200 (g/mL) (mL)

=24g of NaCl

Cx*Vx + Cy*Vy=24

0.3x+0.1y=24 (2)

Substitute y=200-x into (2)

0.3x+0.1(200-x)=24

0.3x+20-0.1x=24

0.2x=24-20

0.2x=4

Divide both sides by 0.2

0.2x/0.2=4/0.2

x=20

Substitute x=20 into (1)

y=200-x

y=200-20

y=180

30% constituents=20 mL

10% constituents=180 mL

6 0
3 years ago
Find the x and y intercepts for 3x-3y=12
Viktor [21]

\huge \boxed{\sf C}\\\\\\\displaystyle \sf Substituting\ x=0 \\\\3(0)-3y=12\\\\-3y=12\\\\Dividing\ each\ side\ by\ -3 \\\\\frac{-3y}{-3} =\frac{12}{-3} \\\\y=-4 \\\\\\Substituting\ y=0 \\\\3x-3(0)=12\\\\3x=12\\\\Dividing\ each\ side\ by\ 3 \\\\\frac{3x}{3} =\frac{12}{3} \\\\x=4

7 0
1 year ago
The Rumpart family is building a new room onto their house. The width of the new room will be 16 feet. The length of the room wi
QveST [7]

Answer:

\text{The length of new room}=16.64\text{ feet}

\text{Area of the new room}=266.24\text{ feet}^2

Step-by-step explanation:

We have been given that the Rumpart family is building a new room onto their house. The width of the new room will be 16 feet.

The length of the room will be 4% greater than the width. This means that length of new room will be 16 feet plus 4% of 16.

\text{The length of new room}=16+(\frac{4}{100}*16)

\text{The length of new room}=16+(0.04*16)

\text{The length of new room}=16+0.64

\text{The length of new room}=16.64

Therefore, the expression 16+(0.04*16) represents the length of new room and the length of new room is 16.64 feet.

Since we know that area of a rectangular shape is width times length.

\text{Area of rectangle}=\text{Length*Width}

\text{Area of the new room}=16\text{ feet}\times 16.64\text{ feet}

\text{Area of the new room}=266.24\text{ feet}^2

Therefore, the area of the new room will be 266.24 square feet.

5 0
3 years ago
Other questions:
  • A city is designing a new trail system that will be 6 1/8 miles long. They plan on placing 49 mileage signs to show the distance
    11·2 answers
  • Raj encoded a secret phrase using matrix multiplication. Using A = 1, B = 2, C = 3, and so on, he multiplied the clear text code
    9·2 answers
  • If the number 36,000,000 is written in scientific notation, the numerical value of the exponent is
    7·1 answer
  • Round each decimal to the nearest whole number 6.7
    7·2 answers
  • Which system of inequalities has a solution set that is a line?
    9·2 answers
  • What is the midline equation of y=-8cos(3pi/2 x +1)
    10·1 answer
  • (n – p)^2; use n=5, and p= 3<br>​
    6·2 answers
  • For the function h(x)=4x-6 find the following: a. f(0) b. f(3) c. f(1/4)
    12·2 answers
  • 50 POINTS
    11·2 answers
  • What is the volume of a rectangular prism that has a length of 18 inches, a width of 1 foot, and a height of 14 inches?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!