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Jlenok [28]
3 years ago
9

The work of a student to solve a set of equations is shown below:

Mathematics
2 answers:
Zolol [24]3 years ago
3 0
He made erron in step 3. He forgot add 4. it should be  
-4m + 4m = -32 - 8n + 4n +4

Greeting
marusya05 [52]3 years ago
3 0
The error is found in step 3.

Here is what he did:

-4m + 4m = -32 - 8n + 4n <<<<<<<<<<<< What happened to +4???

0 = -32 - 4n

n = -8.

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2. SALES TAX Olivia purchases a DVD movie priced
Nataly_w [17]

Answer:

$23.42

Step-by-step explanation:

  • To find the sales tax, you need to 6.5% of $21.99
  • To do this you have to times need to turn 6.5% into a decimal, which is 0.065 (i moved decimal point 2 numbers to the left)
  • then you do 0.065 × 21.99 which equals 1.42935
  • now you have to add 21.99 with 1.42935 = 23.41935
  • because of the context of the question, you need the answer needs to be rounded up to the nearest hundredth.
  • making the answer $23.42 total
8 0
3 years ago
3. 24 +13
Elodia [21]

Answer:

37

Step-by-step explanation:

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5 0
3 years ago
PLEASE HELP due soon!I forgot how to do it omg
Flura [38]

Answer:

(3, -3) is correct

Step-by-step explanation:

-4 × 3 = -12. -12 + 9 = -3

8 0
3 years ago
Oscar has received a $4,000 gift and is looking for a bank to start a savings account. Which option would be the best for him at
Brut [27]

Here is the complete question

A nominal interest rate of 5%

A real interest rate of 5%

A real interest rate of 3%

A nominal interest rate of 3%

Answer:

A real interest rate of 5%

Step-by-step explanation:

A real interest rate of 5% is the best option for oscar. The nominal rate of interest is a type of interest rate that shows the increase in in percentage of money without the depreciation discount that is usually caused by inflation or the payment of tax.

The real rate of interest shows the real increase in the money that has been paid for an investment. This is after inflation has been discounted and all forms of taxes have been paid.

So oscar should invest his $4000 on a savings account whose real interest rate is 5% per year

6 0
3 years ago
0.36(18)+0.04x=0.12(24+x)
zhuklara [117]

Answer:

x = 45

Step-by-step explanation:

0.36(18) + 0.04x = 0.12(24 + x)

6.48 + 0.04x = 2.88 + 0.12x

0.04x - 0.12x = 2.88 - 6.48

-0.08x = -3.6

0.08x = 3.6

x = 3.6/0.08

x = 45

3 0
2 years ago
Read 2 more answers
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