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VashaNatasha [74]
3 years ago
12

In​ March, a family starts saving for a vacation they are planning for the end of August. The family expects the vacation to cos

t ​$=1419. They start with ​$130. At the beginning of each month they plan to deposit 20​% more than the previous month. Will they have enough money for their​ trip? If​ not, how much more do they​ need?
Mathematics
1 answer:
dedylja [7]3 years ago
4 0
I think they will have enough...
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7. Jerry has 23 coins in nickels, n, and dimes, d. He
aliya0001 [1]

Answer:

17 nickles !

Step-by-step explanation:

First, identify the variables:

n = amount of nickels

d = amount of dimes

Next, setup the equations based on what you know.  The first equation is:

n + d = 28

For the second equation, we know that a dime is worth 10¢ and a nickel is 5¢, so it should be:

0.05n + 0.10d = 1.95

This a three-step answer:

In one formula (you can use any of them; most people use the simplest one), single out the variable on one side

Apply the first formula into the second formula, and solve it to get the value of one variable

Apply the answer from the second formula into the first formula, and solve it to get the value of the other variable

======

Step One:

n + d = 28

n + d - d = 28 - d

n = 28 - d

Step Two:

0.05n + 0.10d = 1.95

(0.05 * (28 - d)) + 0.10d = 1.95

1.40 - 0.05d + 0.10d = 1.95

1.40 + 0.05d = 1.95

1.40 - 1.40 + 0.05d = 1.95 - 1.40

0.05d = 0.55

d = 11

Step Three:

n = 28 - d

n = 28 - 11

n = 17

======

Your answer should be 17 nickels and 11 dimes.

You can double check by applying the variables into both formulas.

n + d = 28

17 + 11 = 28

28 = 28

0.05n + 0.10d = 1.95

(0.05 * 17) + (0.10 * 11) = 1.95

0.85 + 1.10 = 1.95

1.95 = 1.95

I hope this helped.

7 0
2 years ago
Which two ratios represent quantities that are proportional?
Anna35 [415]
Answer=A

22/33 and 14/21
3 0
3 years ago
If angle A in the diagram equals 45 degrees and angle B is 4x + 5 degrees, determine the value of x.
Novosadov [1.4K]
With the information given it should be 10.

4x+ 5= 45
-5. -5
4x=40
x=10
3 0
3 years ago
PLEASE HELP ME I WILL GIVE BRAINLEST
Gala2k [10]
What is this it’s so hard
6 0
2 years ago
What % of $9,000,000 = $900,000
timurjin [86]

Answer:

the 000,000 part but at the end leave a 9

4 0
2 years ago
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