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Rudik [331]
2 years ago
11

Dave has $3000 more in a passbook account than in a money market.

Mathematics
1 answer:
Goryan [66]2 years ago
4 0

The amount in the passbook account is $11,000 and the money in the money market account is $8000

Let:

a represent the unknown amount in the passbook account

b represent the unknown amount in the money market account

From the question, the following information can be gathered:

  • The money in the passbook account exceeds the amount in the money market account.

This information can be represented with this equation : a - b = 3000

  • The interest paid on the passbook account exceeds the interest paid on the money market account.

This information can be represented with this equation : 0.08a - 0.10b = 80

The two equations gotten above would be solved using simultaneous equation and the elimination method

a - b = 3000 equation 1

0.08a - 0.10b = 80 equation 2

Multiply equation 1 by 0.08

0.08 - 0.08b = 240 equation 3

Subtract equation 2 from 3

0.02b = 160

Divide both sides of the equation by 0.02

b = 8000

Substitute for b in equation 1

a - 8000 = 3000

Add 8000 to both sides

a = 11,000

To learn more about simultaneous equations, please check: brainly.com/question/23589883?referrer=searchResults

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When a number is decreased by 10% of​ itself, the result is 81, what is the number?
stira [4]

The number is 90.

<h3>What is the number?</h3>

Percentage can be described as the fraction of an amount that is expressed as a number out of hundred. The sign used to represent percentage is %. Percentages are a measure of frequency.

When the number is decreased, the number becomes smaller. This means that the original number is larger than 81.

The equation that can be used to represent the information in the question is:

(1 - percentage decrease) initial number = 81

(1 - 0.1)x = 81

0.9x = 81

x = 81 / 0.9

x = 90

To learn more about percentages, please check: brainly.com/question/25764815

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Annabelle owns a small business selling clothing. She knows that in the last week 56 customers paid cash, 26 customers used a de
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23/51

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The probability of the next customer paying with a debit or credit card is =23/51

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<h2>C</h2>

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HELLPPPPPPPPP WITH THE TOP THREE PLS
rodikova [14]

Answer:

9) Domain: 0≤x≤6

Range: -3≤y≤3

10) Domain: -∞≤x≤∞

Range: -∞≤y≤∞

11) Domain: -∞≤x≤∞

Range: y≥-2

13) Domain: -∞≤x≤∞

Range: -2≤y≤4

Step-by-step explanation:

9) Domain: 0≤x≤6

Range: -3≤y≤3

10) Domain: -∞<x<∞

Range: -∞<y<∞

11) Domain: -∞<x<∞

Range: y≥-2

13) I think you need to look at this one again.  It looks like:

Domain: -∞<x<∞

Range: -2≤y≤4

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3 years ago
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