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
Sophie [7]
3 years ago
7

A jar contains n nickels and d dimes. There are 26 coins in a jar, and the total value of the coins is $2.00. How many nickels a

nd how many dimes are in the jar?
Mathematics
2 answers:
ludmilkaskok [199]3 years ago
7 0
So you want to make 2 equations like this:
n+d=26
0.05n+0.10d=2
Now, use substitution and get d=26-n
plug that into the next equation and get

0.05n+0.10(26-n)=2
Distribute and combine like terms
0.05n+2.6-0.10n=2
2.6-0.05n=2
subtract 2.6 from both sides and you get 

-0.05n=-0.6
Solve for n by dividing and you get
12 nickels.
Now, plug that into the first equation and you get
12+d=26
d=14

14 Dimes and 12 Nickels

Hope this helped!
Andrej [43]3 years ago
3 0
There are 24 nickels and 2 dimes
You might be interested in
What is the value of x in the solution to this system of equations?<br> 5y + 2x = -7<br> y = -2x + 5
alex41 [277]
-2 because of -2xhbhh
3 0
2 years ago
Please help ! ASAP step by step explanation please ​
fredd [130]

Answer:

0

Step-by-step explanation:

→ First find inverse cosine 1/2

60°

→ Now multiply this answer by 3 because then if you substitute it in you get 0.5

∝ = 180°

→ Now find sine of 180°

0

3 0
2 years ago
Isabel purchased bananas and apples at a grocery store. She spent a total of $9.90 on 3 pounds of apples and 2 pounds of bananas
fenix001 [56]

Answer:

C. $2.70

If one pound of apples cost 3 times the amount of a pound of bananas, then a pound of apples costs; $2.70.

7 0
3 years ago
Read 2 more answers
How do you add vectors? Add the vector &lt;3,4&gt; to the vector that goes 7 units at an angle of 2π/3.
telo118 [61]

The sum of two vectors is (- 0.5, 10.1)

<u>Explanation:</u>

To add two vectors, add the corresponding components.

Let u =⟨u1,u2⟩ and v =⟨v1,v2⟩ be two vectors.

Then, the sum of u and v is the vector

u +v =⟨u1+v1, u2+v2⟩

(b)

Two vectors = ( 3, 4 )

angle 2π/3 = 120°

In x axis, the vector is = 7 cos 120°

                                    = 7 X -\frac{1}{2} \\\\=- \frac{7}{2}

In y axis, the vector is = 7 sin 120°

                                   = 7 X 0.866

                                   = 6.062

The second vectors are ( -3.5, 6.062)

Sum of two vectors = [( 3 + (-3.5) ), (4 + 6.062)]

                               = (- 0.5, 10.1)

8 0
3 years ago
Trig questions above solve for x and round to the nearest tenth
Alik [6]

Answer:

x= 51.3

x=35.1

Step-by-step explanation:

10.)

For this one we have the adjacent side and the hypotonouse

Which means we'll use CAH

cos(x)=25/40

x= 51.31781255

(assuming that we have to round to the nearest tenth again)

x=51.3

12.)

For this one we have the adjacent and hyptonouse

we'll use CAH again

cos(x)=27/33

x= 35.09680123

x=35.1

7 0
3 years ago
Other questions:
  • Simplify (6 5x) (7x 3)
    13·1 answer
  • One half of a number p is at least 100
    14·2 answers
  • What is the slope of the line with equation y=-5x
    15·1 answer
  • Mike is planning a vacation.He has narrowed down his choices to types of vacations:coastal,rural and urban.He uses the a spinner
    12·2 answers
  • A homeowner estimates that it will take 11 days to roof his house. A professional roofer estimates that he could roof the house
    10·1 answer
  • Solve for x.3(3x - 1) + 2(3 - x) = 0
    5·2 answers
  • Help pls!!!!!!!!!!!!! trigonometry is it cos sin or tan
    11·1 answer
  • Help please<br><br> Geometry test
    6·1 answer
  • Let A = { 1 , 2 , 3 , 6 } and {x | x is an even whole number less than 9}, find A ∩ B .
    10·1 answer
  • 2. Simplify the expression. (x3)(x7)²<br> 1<br> x18<br> x14<br> x126
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!