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AnnZ [28]
3 years ago
13

Use the elimination method to solve the system of equations. Choose the correct ordered pair. 5x - 2y = 9 3x + 4y = - 5 O A. (5,

- 5) O B. (1, - 2) OC. (7, 13) D. (3, 3)
Mathematics
1 answer:
marta [7]3 years ago
3 0

Answer:

Step-by-step explanation:

4(5x-2y=9)

-2(3x+4y=-5)

20-20x-8y=36

+6x-6x-8y=10

36-20x=10+6x-6x

36-36-20x-6x=10

-26x=10-36

-26x/-26=-26/-26

x=1

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Jane Martin-Smith and her husband deposited $500 in an account on their wedding day and each subsequent anniversary. The money w
PolarNik [594]

Answer:

On their 25th anniversary, their account will have $850

Step-by-step explanation:

7% per year for 25 years is 170%

170% of 500 is 850

I hope this helps!

8 0
3 years ago
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Given m ||n, find the value of x.<br> +<br> (8x-7)<br> m<br> (9X-28)
Korvikt [17]

Answer:

x = 21

General Formulas and Concepts:

<u>Geometry</u>

  • Corresponding Angles - Angles that are congruent to each other and occur with parallel lines

Step-by-step explanation:

<u>Step 1: Identify</u>

We see that the measures given are Corresponding Angles

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

  1. Set up equation:                         8x - 7 = 9x - 28
  2. Subtract 8x on both sides:         -7 = x - 28
  3. Add 28 on both sides:               21 = x
  4. Rewrite:                                       x = 21
5 0
3 years ago
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Write an expression for the sequence of operations described below.
Hatshy [7]

The expression for the sequence of operations described below is d/3 + 5

<h3>Expressions and equations:</h3>

  • Let the unknown value be "d"

  • d divided by 3 is expressed as d/3

Adding 5 to d/3 to get the expression below;

g(d) = d/3 + 5

Hence the expression for the sequence of operations described below is d/3 + 5

Learn more on expressions here: brainly.com/question/29114

3 0
3 years ago
Oil leaked from a tank at a rate of r(t) liters per hour. the rate decreased as time passed, and values of the rate at two hour
Galina-37 [17]
The given data is
t, h:            0     2     4     6     8   10
r(t), L/h:   8.6  7.9  6.8  6.4  5.7  5.3

The lower and upper estimates for the total amount that leaked may be computed as the Left and Right Riemann sums.

The shape of the graph of r versus will determine which of the two sums yields an upper or lower sum.
The plot of the graph is shown below.

The Left Riemann sum is
Sl = 2*(8.6+7.9+6.8+6.4+5.7) = 70.8 L

The Right Riemann sum is
Sr = 2*(7.9+6.8+6.4+5.7+5.3) = 64.2 L

Answer:
The lower estimate for oil leakage is 64.2 L
The upper estimate for oil leakage is 70.8 L

4 0
4 years ago
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How many times does 85 go into 221<br> Explain Thx!!
meriva
Just divide 221 by 85. The answer was 2.6, or 2 3/5
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3 years ago
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