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A jar contains n nickels and d dimes. There are 19 coins in the jar, and the total value of the coins is $1.40.
How many nickels and how many dimes are in the jar? (Hint: Nickels are worth $0.05 and dimes are worth
$0.10.)
Answers
Answer:
The are 8 dimes and 12 nickels
Step-by-step explanation:
1.We set n+d=20 because 20 is the total number of dimes and nickels in the jar.We have $0.05 n because for ever nickel,we earn $0.05.Adding this to the value of dimes,represented similarly by $0.1,then we set this to the amount of money we have in total,which is $1.40.
2.Subtract d from both sides of the first equation to get it by itself.Substitute-d for n in the second equation.The divide both sides by 0.5 to obtain the answer.
3.Substitute 8 in for d to obtain the value or n.
Related Questions
The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so, they need to find out the fraction of people who appear on the list that are actually caught. In an earlier study, the population proportion was estimated to be 0.38. How large a sample would be required in order to estimate the fraction of people who are captured after appearing on the 10 Most Wanted list at the 90% confidence level with an error of at most 0.03
Answers
Someone else on brainly already answered this question-
Select the correct answer from the drop-down menu.
need help fast please!
Answers
Answer:
i think its the first one
Step-by-step explanation:
if u subtract it , then it shouldn't be given a + sign at all
it should stay subtraction
have a good day! :)
plz give me brainliest
Answer: -7x to the seventh power+ x
Step-by-step explanation:
Identify the set of numbers that makes up the domain in the relation ((-2,-2), (0, 2), (2, 4), (3, -6)).
0-2.0.2.3
0-2.0.3,4
0-6-2, 0.2.3.4
0-6-2, 2.4
Answers
Answer:
The first set, -2,0,2,3 are the domains of this relation.
Answer:
The correct answer is:
Option 1: -2,0,2,3
Step-by-step explanation:
When a relation is written in the form of ordered pairs.
In each ordered pair, the first element/coordinate is the input of the function and the second element//coordinate of ordered pair is the output.
The set of inputs is the domain of the relation.
Given relation is:
((-2,-2), (0, 2), (2, 4), (3, -6)).
The first element of each ordered pair is:
-2, 0, 2, 3
Hence,
The correct answer is:
Option 1: -2,0,2,3
At her birthday party, marcie's guests ate 2/3 of her birthday cake and her family ate 1/4 of the cake. How much cake was left after her party?
Answers
Answer:
1/12
Step-by-step explanation:
So you start with an equation. 2/3 plus 1/4= ?.
Step 1: Find a common donominator.
Count by each number until they meat up.
3 6 9 12
4 8 12
Step 2: Multiply.
Basically, make sure that if you do something to the bottom you do the same to the top. You have
[tex]\frac{2}{3}[/tex] = [tex]\frac{?}{12}[/tex]. 3 times 4 is 12. 2 times 4 is 8. Your new fraction is [tex]\frac{8}{12}[/tex].
[tex]\frac{1}{4}[/tex] = [tex]\frac{?}{12}[/tex]. 4 times 3 is 12. 1 times 3 is 3. Your new fraction is [tex]\frac{3}{12}[/tex].
Step 3: Just Add!
[tex]\frac{8}{12} + \frac{3}{12}= \frac{11}{12}[/tex]
Step 4: Answer the question! The question asks "How much cake is left. You know that a whole cake is [tex]\frac{12}{12}[/tex]. So, [tex]\frac{12}{12} -\frac{11}{12} = \frac{1}{12}[/tex]
can anybody help me and explain how to calculate it?
Answers
Answer:
[tex]\frac{\pi }{4}[/tex]
Step-by-step explanation:
1. note, that
[tex]arcsin\frac{1}{2}=\frac{\pi}{6};arcsin\frac{\sqrt{2}}{2}=\frac{\pi}{4};arcsin1=\frac{\pi }{2};arcsin\frac{\sqrt{3}}{2}=\frac{\pi}{3}[/tex]
2. after the substitution:
[tex]\frac{\pi}{6}+\frac{\pi }{4}- \frac{\pi }{2} + \frac{\pi }{3}=\frac{\pi }{4}.[/tex]
The clothing store marked down all their shirts by 30%. If a shirt originally cost $24, what is the sale price of the shirt?
Answers
Answer:
$16.80
Step-by-step explanation:
Since the shirts are marked down by 30%, you need to multiply the cost of the shirt by the percentage.
$24 × 0.3 = $7.20
Next, subtract the discount from the original price to find the discounted price.
$24 - $7.20 = $16.80
Expand and simplify
2(4x + 3) + 4(3x - 1)
Answers
[tex]2(4x + 3) + 4(3x - 1)[/tex]
[tex] = (8x + 6) + (12x - 4)[/tex]
[tex] = 8x + 6 + 12x - 4[/tex]
[tex] = (8x + 12x) + (6 - 4)[/tex]
[tex] = 20x + 2[/tex]
Answer:
8x+6+12x-4= 0
20x+2= 0
20x=-2
20x/20= -2/20
x= -1/10
What is the equation of this line
Answers
1
Which is equivalent to 64?
O 2/4
4
O 16
O 16/4
Answers
Answer:
4
Step-by-step explanation:
Answer:Option (a) is correct.
Step-by-step explanation:
HELPPPPP MEEEEE PLEASEEEE
What is the denominator when 5/6 is multiplied by 7/8
Answers
Answer:48
Step-by-step explanation:
this is because 5x7 equals 35 and 6x8 equals 48 and the answer is 35/48
Answer:
the denominator would be 48
Step-by-step explanation:
8*6=48 which is done by multiplying the 2 denominators but the total fraction would be 35/48
Help plz 13. Mildred is flying a kite on a 30 m string. The angle of elevation of the kite measures 40 degrees,
and Mildred's hand is 2 m above the ground. About how high is the kite off the ground?
a. 21.3 m
c. 19.3 m
b. 25 m
d. 23 m
Answers
Answer: 21.3m
Step-by-step explanation:
The height of the kite of the ground would be calculated as:
We have to calculate the question using a right angled triangle that has angle ACB as 90° while angle CAB will be 40°.
Therefore, the height of the kite would be:
= 30 sin 40 + 2
= 30 (0.6428 ) + 2
= 19.284 + 2
= 21.284 m
= 21.3 m
Lacey is buying a new car. She can get a station wagon, a truck, a hatchback, or a convertible. The outside paint comes in yellow or green. The seats can be covered with white leather or gray fabric. Given these choices, how many different combinations does Lacey have to choose from?
Answers
Step-by-step explanation:
4 different vehicles,
2 different paints,
2 different seats.
Total number of combinations = 4 * 2 * 2 = 16.
does anyone know the answer ?
Answers
Answer:
your answer is D.
Step-by-step explanation:
when the square of r crosses over the square will become square-root
A= πr^2
r=√π/A
when A crosses over it has to be under.
carlos has 3 times as many colored pencil as Joe. Carlos has 36 colored pencil.
Answers
steps:
(joes pencils represent x)
36 = 3x
36/3 = 3x/3
12 = x
I need help on this onee pleasee
Answers
Answer:
1. 2nd row multiplied by the 3 columns : 7x³ , -35 x²,42
2. 3rd row multiplied by the 3 columns : -4x² , 20x ,-24
Step-by-step explanation:
The table requires you to perform multiplication of the terms
The product is as follows;
1. 2nd row multiplied by the 3 columns
7x * x² = 7x³
7x * -5x = -35 x²
7x * 6 = 42
2. 3rd row multiplied by the 3 columns
-4 * x² = -4x²
-4 * -5x = 20x
-4*6 = -24
Give the domain and range.
a. domain: {-2, 0, 2), range: {4, 6, 8}
b. domain: {0, 2), range: {6, 8}
c. domain: {4, 6, 8), range: (-2, 0, 2}
d. domain: {6, 8), range: {0, 2}
Answers
Answer:
a no is correct answer of the question
The area of a rectangle is 36 square meters. If the length of the rectangle is 3, what is the width?
a
12
b
15
c
108
d
9
Answers
So, 36/3 = 12
Width is 12
One of the Confederation's accomplishments was an arrangement for
{currency to be created}
{foreign troops}
{new states in the West}
{the military}
Answers
please answer it fast
Answers
Answer:
c
Step-by-step explanation:
Please help I can’t figure this out
Answers
Answer:
x+63=15x-21, 14x=84, x=6, based on that NMO=69 and LMO=69 because they must be =
Step-by-step explanation:
A teacher had 39 students in her classes. If each student completed 73 problems which expression shows about how many problems she'd have to grade?
Answers
For which equations is 8 a solution? Select the four correct answers.
Answers
X - 4 = 10
3x = 24
X/8 = 1
Those 4 are the correct answers
Answer:
x+2=10
x-4=4
3x=24
x/8=1
Step-by-step explanation:
Is y=4^2 an exponential function
Answers
Answer:
yes
Step-by-step explanation:
Yes, y = 4² is an exponential function.
What is exponential function?
" An exponential function is a mathematical function which can be expressed as y = [tex]a^{x}[/tex] where 'a' is any constant value not equals to 0 and 'x' is a variable which belongs to any real number."
According to the question,
y = 4²
If we compare with general form y = [tex]a^{x}[/tex] of exponential function we have,
a = 4
x = 2
Hence, we conclude that y = 4² is an exponential function.
Learn more about exponential function here
https://brainly.com/question/11487261
#SPJ2
2. 11d = 121
What is the algebraic equations
Answers
What is 5 x 9 ÷ 3 - 3²?
Answers
Answer:
6
Step-by-step explanation:
Using PEMDAS, you would first do the exponent which is equal to 9. the following it you would do 5x9 which is 45 and divide it by 3 which gives you 15. finally you subtract the 9 from 15 and get 6.
Answer:
6
Step-by-step explanation:
5 x 9 ÷ 3 - 3²
5 x 9 ÷ 3 - 9
45 ÷ 3 - 9
15 - 9
6
use PEMDAS for the order of operations.
what is equivalent too 4a + 10
Answers
If P(A or B) = 0.8, P(A) = 0.3, and P(A and B)= 0.15, find P(B).
P(B) =
(Simplify your answer. Type an integer or a decimal.)
Answers
9514 1404 393
Answer:
P(B) = 0.65
Step-by-step explanation:
The appropriate formula is ...
P(A or B) = P(A) +P(B) -P(A and B)
Then P(B) is ...
P(B) = P(A or B) +P(A and B) -P(A)
P(B) = 0.8 +0.15 -0.3
P(B) = 0.65
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPHEL
Answers
Answer:
15 degrees
Step-by-step explanation:
90-75= 15
........
if you dont know what 3x4= its 12
Answers
Answer:
thanks im not smart
Step-by-step explanation:
sn i knew that...
In the first 1/5 hour of a snowstorm 1/3 inches of snow fell in the snow continues at the same rate how much snow will fall in 4 1/5 hours
Answers
Answer:
70 (I think)
Step-by-step explanation:
1/3 is 3.33 (threes go on forever) but thats only for 1/5 of an hour, so you multiply 3.33 by 5 and get 16.66 (pretty sure the sixes also go on forever) and thats one full hour, so you multiply 16.66 by 4.20 (4 1/5 but in decimal form) and you get 70
Sorry if my answer is incorrect or doesn't make sense because I'm not 100% sure if I'm correct