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grandymaker [24]
3 years ago
13

Elimination method 2x-7y=0 4x+9y=0

Mathematics
1 answer:
Molodets [167]3 years ago
5 0

Answer:

The answer to the question

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Sue receives a monthly salary of $500. She also receives a sales commision of
artcher [175]

Answer:

2000 because you got to subtract

5 0
3 years ago
Sally invests £8000 in a savings account. The account pays 2.8% compound interest per year work out the value of her investment
Alborosie

Answer: the value of her investment after 4 years is £8934.3

Step-by-step explanation:

The formula for determining compound interest is expressed as

A = P(1+r/n)^nt

Where

A = total amount in the account at the end of t years

r represents the interest rate.

n represents the periodic interval at which it was compounded.

P represents the principal or initial amount invested.

t represents the duration of the investment in years.

From the information given,

P = 8000

r = 2.8% = 2.8/100 = 0.028

n = 1 because it was compounded once in a year.

t = 4 years

Therefore,

A = 8000(1+0.028/1)^1 × 4

A = 8000(1+0.028)^4

A = 8000(1.028)^4

A = £8934.3 to the the nearest penny

6 0
4 years ago
If x^2=y^2+z^2<br><br> what does x equal?
Zepler [3.9K]

Answer:

\displaystyle x = \sqrt{y^2 + z^2}

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Equality Property

<u>Algebra i</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

\displaystyle x^2 = y^2 + z^2

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. [Equality Property] Square root both sides:                                                    \displaystyle x = \sqrt{y^2 + z^2}
3 0
3 years ago
Bruce retiled his kitchen. Originally, he bought three boxes of tile with the same number of tiles in each. He ran out of tile a
ella [17]

Answer:

Step-by-step explanation:

Is it possible for Bruce and Felicia to have used the same number of tiles? Use complete sentences to explain your reasoning.

No

5x + 2 ≠ 5x + 5

because

       2 ≠ 5

If they each used the same number of tiles, how many tiles were in each box?

6x + 2 = 5x + 17

6x - 5x + 2 - 2 = 5x - 5x + 17 - 2

        x = 15 tiles

8 0
3 years ago
You are asked to tutor a friend in algebra with adding and subtracting trinomials. Create an example of how to add two trinomial
vesna_86 [32]
Addign trinomials (2x+4xy+8z)+(8x+5xy+23z) all you have to do is combine the like terms 2x and 8x= 10x, 4xy+5xy=9xy, and 8z+23z=31z. so the simplified answer to adding the trinomials would be 10x+9xy+31z. 

Subtacting trinomials (4x+9y+3) - (-1+3x-2y) . 
When doing subtracting you still combine like terms but this time you change the sign before every term. If that is confusing, just pretend there is a negative 1 infront of parenthases and multiply that before you subtracts the two trinomials. so...
4x - 3x= x, 9y+2y=11y and 3+1=4. so simplified answer of the subtraction would be x+11y+4 

I hope this helped :) Good luck !

4 0
3 years ago
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