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-BARSIC- [3]
3 years ago
6

Evaluating Expressions please help!!!

Mathematics
1 answer:
Ulleksa [173]3 years ago
8 0
-1 is the correct answer
Hope it helps
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Clare knows that Priya has a bunch of nickels and dimes in her pocket and that
enyata [817]

Answer:

a) 21 nickels and 2 dimes

b) 5x+10y=125

c) There are 13 nickels and 6 dimes

d) The point (13,6) a solution to the equation you wrote

Step-by-step explanation:

Let x be the number of nickels and y be the number of dimes in Priya's pocket.

1 nickel = 5 cents

x nickels = 5x cents

1 dime = 10 cents

y dimes = 10y cents

b. Total amount in nickels and dimes is 5x+10y cents that is $1.25. Convert $1.25 into cents:

\$1.25=125\ cents,

so the equation that describes the relationship between the number of dimes and number of nickels is

5x+10y=125

a. To find one possible solution, substitute an arbitrary value of y and find x. Let y = 2, then

5x+10\cdot 2=125\\ \\5x+20=125\\ \\5x=125-20\\ \\5x=105\\ \\x=21

21 nickels and 2 dimes

c. The point (13,6) means that there are 13 nickels and 6 dimes.

d. Substitute x = 13 and y = 6 intoe the equation and check whether it is true:

5\cdot 13+6\cdot 10=65+60=125

True, so the point (13,6) a solution to the equation you wrote

5 0
3 years ago
Sherri saves nickels and dimes in a coin purse for her daughter. The total value of the coins in the purse is $0.95. The number
forsale [732]
I’m guessing that this is for systems of equations?
n - nickels
d - dimes

These are the equations you start off with.
n = 5d-2
0.95 = 0.10d+0.05n

Substitute the top equation for n into the variable n in the bottom equation.
0.95 = 0.10d+0.05(5d-2)

Solve for d.
0.95 = 0.10d+0.25d-0.10
1.05 = 0.35d
3 = d

Substitute d into the top equation and solve for n.
n = 5(3)-2
n = 15-3
n = 12

There are 3 dimes and 12 nickels in the coin purse! Hope this helped <3

7 0
3 years ago
Read 2 more answers
Match the dependent variable to the correct linear function.
jonny [76]

Answer:

W = 5 + 13.50s

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
I need help with this question
umka21 [38]

Answer:

Tax~required~to~be~paid = 5.4%  (5) = \frac{5.4}{100}(5) = \frac{27}{100}~of~(5) = \frac{5.4}{100}(5) = \frac{27}{100} = 0.27~dollars

8 0
3 years ago
A water tank was 1/8 full of water
vekshin1

Answer:

16,800 Liters

Step-by-step explanation:

Convert 3/4 into eighths, because it was already 1/8 full before the 10,500 liters were added:

3/4= 6/8

Subtract 1/8 from that (because it was already 1/8 full):

6/8-1/8= 5/8

Divide 10,500 by the 5 (because you want how many liters each part is):

10,500/5= 2,100

You know can say that every eighth is 2,100 Liters of water.

Multiply that by the 8 total parts it can hold:

2,100x8= 16,800 Liters

8 0
4 years ago
Read 2 more answers
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