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
MAVERICK [17]
3 years ago
5

every evening jenna empties her pockets and puts her change in a jar. At the end of the week she counts her money. One week she

had 40 coins, all of them dimes and quarters. when she added them up, she had a total of $7.75. how many dimes did jenna have
Mathematics
1 answer:
Darya [45]3 years ago
8 0
Let Q= the number of quarters and D= the number of dimes.
Q+D= 40 coins
0.25Q+0.1D= $7.75
Rewrite equation 1 as: D = 40-Q and substitute into equation 2
0.25Q+0.1(40-Q)= 7.75 Simplify the left side
0.25Q+4-0.1Q= 7.75 Subtract 4 from both sides
0.25Q-0.1Q= 3.75 Convime like terms on left side
0.15Q= 7.75 Divide both sides by 0.15
Q=25 and D= 40-Q
D= 40-25 which is 15
So Jenna had 25 quarters and 15 dimes.
<span>To check multiply 25 x 25 and 15x10 which equals 625 and 150 this equals 775 so this is 7.75</span>
You might be interested in
Please help me on this work please !
belka [17]
The second one I beileve is the answer to your question
5 0
3 years ago
3. A jump rope is 9 feet long. How long is the jump 4<br> rope in yards?
Inessa05 [86]
The answer is 3 yards.

There are 3 feet in a yard, so if we divide 9 (the length of the rope in feet) by 3, then we get the amount of yards in the rope: 9/3=3.
8 0
3 years ago
Read 2 more answers
Andrew McCutchen hit 18 homeruns in 9 baseball games. At this rate, how many homeruns will he have hit
Feliz [49]

Answer:

if it's 18 home runs in 9 baseball games

then you're dividing 18 by 9 which is 2 home runs for every 9 baseball games

to prove if you're right (9×2=18)

if it's 11 baseball games then 11×2=22

Hope It Helps ☺️

6 0
3 years ago
What is the solution for <br> -8(8x-4)+10(-7x-6)
77julia77 [94]
<span>-8(8x-4)+10(-7x-6) 
=-64x + 32 - 70x - 60
= -134x -28

hope it helps</span>
5 0
3 years ago
Together a ruler and a pen cost $3.00. The pen cost $1.80 more than the ruler. How much does each item cost?
Svetach [21]

Answer:

2.20

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • How to find the interquartile range of an even number of data points?
    9·1 answer
  • How do you find the answer
    12·1 answer
  • Factor tree for number 119
    5·1 answer
  • A computer programmer worked for 10 hours and earned $70, which is a of $__ per hour
    13·1 answer
  • Please heeelp !! <br> Missing triangles !!
    15·2 answers
  • Lily drew 6 hearts and 21 circles. What is the ratio of hearts to all shapes? ​
    15·1 answer
  • Which mixed number is equivalent to 606/100
    11·1 answer
  • Please Help me pleaseeeeee
    6·1 answer
  • The linear equation y = −5x − 18 is written in which form?
    8·1 answer
  • 6 O
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!