A bag contains 21 coins consisting of nickles and dimes. The total value of the coins is $1.70.
Write a system of equations that models this situation. How many nickels are in the bag?

Answers

Answer 1

Answer:

8

Step-by-step explanation:

x = nickles

y = dimes

0.05x + 0.10y = 1.70

x + y = 21

y = 21 - x

0.05x + 0.10 (21 - x) = 1.70

0.05x - 0.10x + 2.10 = 1.70

-0.05x + 2.10 = 1.70

-0.05x = -0.40

x = 8


Related Questions


4. Emily ate dinner at Geisha. Her total was $17.50. A 8% sales tax was
added to her bill. After, Emily added a 20% tip on the total after tax. What
was Emily's final total?
*

Answers

Answer: $22.68

Step-by-step explanation:

17.50 times 0.08 = 1.40

17.50 + 1.40 = 18.90

Now the tip:

18.90 times .2 = 3.78

18.90 + 3.78 = 22.68

please help me. i am so confused please

Answers

Answer:

what is the question above what you are showing in the picture ?

Step-by-step explanation:

it will help a lot

I need to see what the question is above it

how to write a fraction in interval notation

Answers

Answer:

So it's all real numbers except for that value okay now I want to show you guys how to write that in interval. Form because it we wrote all real numbers as negative infinity to infinity

Step-by-step explanation:

What is the slope of the line that passes through the points (-2,-5) and (-3,-6) write your answer in simplest form

Answers

Answer:

y = x - 3

Step-by-step explanation:

Please help me finish !
will give brainiest

Answers

Answer:

6. 60

7. 24.25

8. 28.00111604  or 28

Step-by-step explanation:

30 +90 =120 180-120=60

Sin A = a/c, so a = cSin A. Also Cos A = b/c, so b = cCos A so Sin30=14/c=28

Cos30=b/28 b=24.25

now 14^2+24.25^2=c^2 which gives 28.00111604 or 28

Sally puts $2,500 in a bank account. She takes it out 10 years later and with interest, now has $4,100. What is the percent change?

Answers

Answer:

The percentage increase is 64%

Step-by-step explanation:

Answer:The percentage increase is 64%

Step-by-step explanation:

Find the geometric mean between 4 and 20.

Answers

Answer:

4[tex]\sqrt{5}[/tex]  

Step-by-step explanation:

Geometric mean is when you multiply the two numbers 4 and 20 and then take the square root of the product.

So 4 x 20 = 80, and the [tex]\sqrt{80}[/tex] = 4[tex]\sqrt{5}[/tex]

However-- that's if you meant finding the geometric mean of 4 and 20 when you said "between"

Answer

4√5

Explanation

4 x 20 = 80
√80 = 4√5




Write these numbers in order of size, start with the
smallest number

60% 1/2 0.3 3/4 0.4

Answers

(Smallest to biggest) 0.3, 0.4, 1/2, 60%, 3/4
Turning all number to decimals
.3, .4, .5, .60, .75

cuál es el resultado de 1/3 entre 4/7?

A._ 4/21
B._ 7/12
C._ 12/7
D._ 21/4​

Answers

Answer:

La leche que sale del huevo

Jenny bought an item online for $180, and she was charged a $9 fee for shipping. What percent of the sale price was the shipping fee?

Answers

Answer:

Step-by-step explanation:

can u please help me with my english ?

What solid figure is shown below?

Answers

Answer:

froggy lookin kinda funky foo

6) A recipe serves 10 people and uses 3 cups of flour. How many cups of
flour is needed to serve 15 people? *

Answers

Answer:

4.5 cups

Step-by-step explanation:

I got the answer of 4.5 cups

PLZ HELP!!!! ILL GIVE BRAINLIEST

Answers

Answer:

0,0

Step-by-step explanation:

not 100% sure

Fiber one bran cereal boasts that it contains 57% of the Daily Value of fiber you need. If 1 serving contains 15 gram of fiber, how much fiber do you need in one day

Answers

Answer:

26.3 grams

Step-by-step explanation:

57% of fiber is 15 grams. To find 1% you would divide 15 by 57 which is 0.2631578947. Now multiply 1% by 100 to get 100% fiber. The amount of fiber needed per day is 26.31578947 (the rounded answer is 26.3)

The following histogram represents the number of hours students practice each week for band

How many hours did most students practice?

Answers

the answer is 5-6 :)

Answer:

Most Students practiced 5 to 6 hours

can someone please help ​

Answers

Answer:

x=3, y= - 2

Step-by-step explanation:

4x + 3y = 6

x-3y= 9

x=9+3y

4.(9+3y)+3y=6

36+12y+3y=6

15y = - 30

y = - 2

=> x= 9+3y

x= 9+ 3.(- 2)

x= 3

x-3y=9
x=3y+9
4(3y+9)-3y=9
12y-3y+36=9
9y=-27
y=-3
x-3(-3)=9
x+9=9
x=0
(0,-3)

Solve for x.

−1.5x−3.1<5.5

Drag and drop a number or symbol into each box to correctly complete the solution.

Answers

Answer:

x <-5.73

Step-by-step explanation:

Answer:

5.733333333...

Step-by-step explanation:

The answer is positive and has a repeating 3 at the end.

What shape will the vertical cross-section of
a cube be?

Answers

Answer:

a triangle;

Three faces of the cube meet to form the vertex, so the cross section is a two-dimensional figure with three sides

Step-by-step explanation:

Help me please...........

Answers

Answer:

6/19

Step-by-step explanation:

Answer:

6/19 subtracting 3 each time form the numerator

Step-by-step explanation:


Given the function g(x) = -3x + 4, compare and contrast g(-2) and g(4). Choose the statement that is true concerning these two values.

Answers

Answer: D

Step-by-step explanation:

Fill in the x's with -2 for the first time to get one answer then go back and fill in 4 for the second answer.

g(-2)= 10

g(4)=-8

Proving g(-2) is greater than g(4).

add 1/5 add 2/7 plz help

Answers

Answer:

17/35

Step-by-step explanation:

Answer:

17/35

Step-by-step explanation:

Math-way

(4) + (14 – 4i) =
Express your answer in the form (a + bi).

Answers

Answer:

I would recommend using photomath and math away for stuff like this :D

Step-by-step explanation:

use these apps save you lot of time

25 points please answer all 4 problems

Answers

Answer: The answers are in order

6(n-9)=54

5x=35

3x-6

1/2(y+12)=7

Step-by-step explanation:

mr rolando sold the house and that at 10, 500,000,000.00 if he will receive 4% commansion, how much his commansion? ​

Answers

Answer:

$420,000,000

Step-by-step explanation:

Multiply 10,500,000,000 by .04.

Hope this helps!

helppp meeee pleaseeee

Answers

Answer:

0.3907 I think hope this helps

Write an equation in point-slope form of the line that passes through the two given
points.
(4,7) and (5, 1)

Answers

Answer:

y-7=-6(x-4)

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(1-7)/(5-4)

m=-6/1=-6

y-y1=m(x-x1)

y-7=-6(x-4)

what were the two goals of the monroe doctrine? Americans wanted to stop european-

A. globilization, free enterprize
B. intervention colonization
C.colonization, ratification​

Answers

Answer:

I believe it is C, but i may be wrong.

Two streets form an intersection. C and D are supplementary
angles. If the measure of C is 140° and the measure of D is
two times the value of x, what is the value of x?

Answers

Answer:

20degrees

Step-by-step explanation:

The sum of angle C and D is 180 degrees since they are supplementary

Given

m<C = 140 degrees

m<D = 2x

Taking the sum and equating to 180

140 + 2x = 180

2x = 180-140

2x = 40

x = 40/2

x = 20 degrees

Hence the value of x is 20degrees

Hace 5 años la edad de un joven era 1/3 de la edad del papá y dentro

de 5 años la edad del joven será 1/2 de la edad del papá. Si x es la edad

actual del joven y si y es la edad actual del papá. ¿Cuál es la edad actual

de cada uno?
Ya está es mi última pregunta si me ayudan seria estupendo ​

Answers

Answer:

respuesta el joven tiene 15 y el padre 30

change 4x - 5y = 10 into slope intercept form and graph

Answers

Answer:

Slope intercept form: y = 4/5x - 2

Step-by-step explanation:

(subtract 4x from both sides) -5y = -4x + 10

(divide everything by -5) y = 4/5x - 2

To graph, place a point at (0,-2), and then travel up 4 and over right 5 (or down 4 and to the left 5) to place the next point, then draw a line through the points

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