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
tankabanditka [31]
3 years ago
8

Sally has 20 coins in her piggy bank, all dimes and quarters. The total amount of money is $3.05 If d = the number of dimes and

q = the number of quarters Sally has, one of the linear equations that could be used to model this situations is
Mathematics
1 answer:
mars1129 [50]3 years ago
4 0

Answer:

d + q = 20

0.25d + 0.10q = 3.05

Step-by-step explanation:

Given

Coins = 20

Value = $3.05

Required

Determine the equation that represent this

From the question, we have that

d = the number of dimes

q = the number of quarters

This implies that;

d + q = 20

Also;

1 d=\$0.25\ \ and\ \\1 q= \$0.10---------- Standard unit of conversion;

This implies that

0.25d + 0.10q = 3.05

Hence, the equations are:

d + q = 20

0.25d + 0.10q = 3.05

You might be interested in
You need 660 mL of a 40% alcohol solution. On hand, you have 35% alcohol mixture. You also have a 95% alcohol mixture. How much
ozzi

Answer:

A. 605 mL of the 35% solution

B. 55 mL of the 95% solution

Step-by-step explanation:

It is given that, you need 660 mL of a 40% alcohol solution. On hand, you have 35% alcohol mixture. You also have a 95% alcohol mixture.

Let x and y be the amount of 35% alcohol solution and 95% alcohol solution (in mL) respectively.

So,

Amount equation: x+y=660        ...(1)

Alcohol equation : 0.35x+0.95y=0.40(660)\Rightarrow 0.35x+0.95y=264     ...(2)

On solving (1) and (2), we get

0.35(660-y)+0.95y=264

231-0.35y+0.95y=264

0.6y=264-231

y=\dfrac{33}{0.6}

y=55

Now, substitute y=55 in (1).

x+55=660  

x=660-55  

x=605  

Therefore, we need 605 mL of the 35% solution  and 55 mL of the 95% solution.

4 0
3 years ago
A napkin is folded into an isosceles triangle, triangle ABC, and placed on a plate, as shown. The napkin has a perimeter of 38 c
gavmur [86]
The area of plate which is covered by the napkin is equal to the area of folded napkin.

Before finding the area of folded napkin, we should find the dimension of the napkin.
Find the length of the leg side, the two leg has similar length.
perimeter = 38
l + l + 8 = 38
2l + 8 = 38
2l = 30
  l = 15
Each leg is 15 cm long.

Find the area of folded napkin
area = 1/2 × s × s × sin of angle between the sides
area = 1/2 × 15 × 15 × sin 30°
area = 1/2 × 15 × 15 × 1/2
area = 225/4
area = 56.25
to the nearest whole number >> 56 cm²
The answer is third option
6 0
3 years ago
Read 2 more answers
Free brainliest and what is 21/7?
astraxan [27]

Answer:

if your dividing then 3 but if you want 21 sevenths as a mixed number then it would be 3.

Step-by-step explanation:

to find the quotient, you need to find out what multiplied by 7 gives you 21. (thats easy 3) so there is your answer. to find the mixed version of 21 sevenths you need to divide 21 by 7 ( literally what  i just showed...) and you get 3.

<u><em>HOPE THIS HELPS!!!</em></u>

5 0
3 years ago
Read 2 more answers
What is the absolute value how do you do this problem?<br> f(x)=|-4-3|
Rainbow [258]
You subtract normally inside the absolute value (the two bars):
-4-3 is -7
Since the negative is INSIDE the absolute, the answer will turn to a positive. Think of the bars as a jail cell for the negatives. Once the negatives are in there, only positive numbers will come out. So your answer is 7.
5 0
3 years ago
60 points
DIA [1.3K]

Answer:

2 is C. , 3 is C. , 4 is D.  

Step-by-step explanation:

2

Square roots are not polynomials

3

The highest degree of one term in the polynomial is 4

4

Terms are separated by (+) or (-) signs. If you count them up there are 4

7 0
3 years ago
Read 2 more answers
Other questions:
  • A machinist is allowed 1% tolerance on a shaft that measures 15 inches long. What is the amount of tolerance
    14·2 answers
  • Factor out the coefficient of the variable 1/2a-1/2
    13·1 answer
  • The legs are the sides that form the right angle in a right triangle true or false
    5·2 answers
  • Brianna's gross annual salary is $50,676. What is the recommended maximum monthly rent she should pay?
    8·1 answer
  • What is the product?
    6·1 answer
  • 0.11 as a fraction and in the simplest form
    15·2 answers
  • The sum of two numbers is 42. Their product is 360. What are the two numbers?
    14·2 answers
  • Is 10.3 an improper fraction? explain
    7·1 answer
  • Each individual letter in TENNESSEE is placed on
    6·2 answers
  • What is the factored form?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!