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Naya [18.7K]
4 years ago
6

Solve the system of equations below.

Mathematics
1 answer:
trapecia [35]4 years ago
5 0

Answer:

A) x + y = 8

B) 3x + 2y = 21

We multiply A) by -2

A) -2x -2y  = -16 Then we add this to

B) 3x + 2y = 21

x = 5

y = 3

Second answer is correct

Step-by-step explanation:

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A pair of shoes is on sale for 15% off. With this discount, customers will save $9 if they buy the shoes .In this situation, wha
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Answer:

$9 is the part, 15% is the percent, and $60 is the whole.

Step-by-step explanation:

$9 is %15 of the whole. This means $9 is the part, 15% is the percent, and the whole is the total cost of the shoes after the discount. The total cost of the shoes after the discount is 60.

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3 years ago
Find the exact value of the trigonometric function
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Answer:

2  

Step-by-step explanation:

Step 1. <em>Find a coterminal angle that falls be 0 and 2π. </em>

Remember that cscθ is a periodic function. It repeats every 2π radians.

If n is an integer, cscθ = csc(θ ± 2πn)

csc(17π/6) = csc(12π/6 + 5π/6)

                = csc(2π + 5π/6)

                = csc(5π/6)

Step 2. <em>Use the unit circle to evaluate cscθ. </em>

cscθ = 1/sinθ

Let θ = 5π/6

In a unit circle (below), the sine of an angle is y.

sinθ = ½

cscθ = 1/sinθ

        = 1/(½)

        = 2

3 0
4 years ago
Pls help me but pls dont send me a link im begging u
Vesna [10]

Answer:

Step-by-step explanation:

24 + 3r >= 100 is the equation

3 0
3 years ago
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This graph shows the costs of purchasing two types of bird seed mix. Which statement is true? Seed Mix A is more expensive than
blondinia [14]

Answer:

seed Mix A is more expensive than Seed Mix B.

Step-by-step explanation:

The graph of Mix A is above the graph of Mix B.

Looking at the labels of the graphs, we see that the x-axis represents the number of bags bought and the y-axis represents the cost.

For every point along the x-axis, Mix A's cost is above Mix B's cost.  This means that Mix A is more expensive.Step-by-step explanation:

3 0
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Natali5045456 [20]

3(x - 3) + 8x = 5(2x + 1)

Expanding the terms,

3(x - 3) + 8x = 5(2x + 1) \\ 3x - 9 + 8x = 10x + 5

Collecting like terms,

3x - 9 - 8x = 10x + 5 \\ 3x - 8x - 10x = 5 + 9

Evaluating the terms,

3x - 8x - 10x = 5 + 9 \\  - 15x = 14

Divide both sides by -15,

- 15x = 14 \\ x =   - \frac{14}{15}

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