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WARRIOR [948]
3 years ago
10

tess has 100 dimes and quarters , if the total of the coins is $21.40 how many of each of the coins does she have ?? Using subst

itution or elimination find the answer
Mathematics
1 answer:
Zanzabum3 years ago
4 0

Answer: 24 and 76

Step-by-step explanation:

{

d

+

q

=

100

10

d

+

25

q

=

2140

From the first equation, we have  

d

=

100

−

q

Substituting that into the second equation, we have

10

(

100

−

q

)

+

25

q

=

2140

⇒

1000

−

10

q

+

25

q

=

2140

⇒

15

q

=

1140

⇒

q

=

1140

15

=

76

Knowing that  

q

=

76

we can substitute that value into the first equation to obtain

d

+

76

=

100

∴

d

=

24

Thus, Sue has  

24

dimes and  

76

quarters.

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Answer:

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I really need help please
Leokris [45]

Answer:

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6 0
2 years ago
11z > -33 help please
stich3 [128]
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3 years ago
If the sales tax rate is 8%, what is the tax on a $5.75 cent purchase?
lora16 [44]

Answer:

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Step-by-step explanation:

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Sales tax= 8%

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Multiply

5.75*0.08

3 0
2 years ago
You purchase a $220 Arline ticket. You have a discount code to receive 10% off. There is a 10.5% service charge added to the tot
antoniya [11.8K]
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7 0
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