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Goshia [24]
3 years ago
7

I need to know this quickly please

Mathematics
1 answer:
Pie3 years ago
7 0

Answer:

Step-by-step explanation:

b is the answer

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X + 9 = 7 <br> How do you move the constant to the right side and change it’s sign
Otrada [13]

Step-by-step explanation:

X + 9= 7

get x by itself you -9 on both sides

X + 9 = 7

- 9. -9

X = -2

8 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP!!!
barxatty [35]

Answers:

  • <u>24000 dollars</u> invested at 4%
  • <u>18000 dollars</u> was invested at 7%

======================================================

Work Shown:

x = amount invested at 4%

If she invests x dollars at 4%, then the rest (42000-x) must be invested at the other rate of 7%

She earns 0.04x dollars from that first account and 0.07(42000-x) dollars from the second account

This means we have

0.04x+0.07(42000-x)

0.04x+0.07*42000-0.07x

0.04x+2940-0.07x

-0.03x+2940

This represents the total amount of money earned after 1 year.

We're told the amount earned in interest is $2220, so we can say,

-0.03x+2940 = 2220

-0.03x = 2220-2940

-0.03x = -720

x = -720/(-0.03)

x = 24000 dollars is the amount invested at 4%

42000-x = 42000-24000 = 18000 dollars was invested at 7%

----------------------

As a check, we can see that

18000+24000 = 42000

and also

0.04x = 0.04*24000 = 960 earned from the first account

0.07*18000 = 1260 earned from the second account

1260+960 = 2220 is the total interest earned from both accounts combined

This confirms our answers.

7 0
3 years ago
Write the sentence as an equation z and 40 more is the same as 344
KengaRu [80]
Your answer z+40=344
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2 years ago
Evaluate j/k -0.2k when j =25 and k = 5
denis-greek [22]
When you have an equation that has variables and you know the value of those variables, just plug it it. So plugging the vaules we get
\frac{25}{5}-\frac{1}{5}5
Just evaluating we get 4
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3 years ago
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Write an equation in slope intercept form for the graph of the line.
zhannawk [14.2K]
Y = 2x - 3

Hope this helps!!!!!
8 0
3 years ago
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