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4vir4ik [10]
3 years ago
7

How do you solve 7a+10=2a

Mathematics
2 answers:
amm18123 years ago
4 0
7a+10=2a -7a. -7a 10=-5a Divide by -5 and u get ur answer
sammy [17]3 years ago
3 0
Subtract 7a from both sides giving you 10=-5a and divide everything by 5. This gives you a=-2
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Can someone please help me-
puteri [66]

Answer:

can be expressed as decimal: 0.025

s= 1.025* $250

 = $256.25

after 8 years

s= $250* 1.025^8

 ~$304.6

earned $54.6

Step-by-step explanation:

2 and a half is equivilant to 2.5

because it is a % (out of 100) move the decimal 2 places down

2.5-->0.25-->0.025

so can be expressed as decimal: 0.025

interest after 1 year is:

original amount of money * (interest rate+1.0)

+1 because you are adding on to 100%. you already have 100%.  if it was just the interest rate, the amount of money would go down.

so

s= 1.025* $250

=1.025* 250

=256.25

interest after 8 years,

that means you have to take the original, and multiply it by the interest rate, then the new original multiply by intrest rate a total of 8 times

to do this use an exponent, because exponents base the total off the total before them. if that makes any sense srry

s= $250* 1.025^8

 ~$304.6  (I used calculator)

to get her earnings, subtract the new amount of money with her original amount of money

304.6-250

=54.6

$54.6

hope this helps

4 0
2 years ago
Read 2 more answers
A coffee shop sells bags of coffee for a regular price of $5 per bag. Ravi bought some bags and used a coupon for $20 off his en
Sliva [168]

Answer: He bought 7 bags

Step-by-step explanation: So if he bought 7 bags then the cost will be $35. And he used a $20 off coupon for his entire purchase, so $15.

Hope this helps and a brainliest would be appreciated

8 0
3 years ago
At the local farmers market, it costs $10 to rent a stand and $7 for every hour you stay. If you pay a total of $38, how many ho
zhenek [66]
4 hours

Step by step:
$38 - 10 = 28
28/7 = 4
7 0
3 years ago
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Neko [114]

Answer:

14.225 kilometers.

Step-by-step explanation:

Monday 3.6

Tuesday 4.705

Wednesday 5.92

By using the addition operation, the  total distance, in kilometers, that Andrea ran over the three days will be :

3.6 +4.705 +5.92=14.225

Hence, the total distance that Andrea ran over the three days = 14.225 kilometers.

5 0
3 years ago
Quickly please I have like 7 minutes of class
Vinvika [58]

Answer:

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Step-by-step explanation:

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