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3 years ago

Which row of the input/output table is incorrect?

Mathematics

1 answer:

zaharov [31]3 years ago

8 0

Row A: x = 3

y = 2x - 3

y = 2(3) - 3 = 3 This is correct

Row B: x = 5

y = 2x - 3

y = 2(5) - 3 = 7 This is correct

Row C: x = 7

y = 2x - 3

y = 2(7) - 3 = 11 this is correct

Row D: x = 10

y = 2x - 3

y = 2(10) - 3 = 17 THIS IS INCORRECT, SO ROW D

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9/20

NISA [10]

For this case we must find the solution of the following quadratic equation:

$x ^ 2 + 5x + 7 = 0$

Where:

$a = 1\\b = 5\\c = 7$

Then, the solution is given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Substituting the values:

$x = \frac {-5 \pm \sqrt {5 ^ 2-4 (1) (7)}} {2 (1)}\\x = \frac {-5 \pm \sqrt {25-28}} {2}\\x = \frac {-5 \pm \sqrt {-3}} {2}$

By definition we have: $i ^ 2 = -1$

$x = \frac {-5 \pm \sqrt {3i ^ 2}} {2}\\x = \frac {-5 \pm i \sqrt {3}} {2}$

Thus, we have two complex roots.

Answer:

The equation has no real roots.

4 0

3 years ago

Graph from slope intercept form y=-1/3x+5

jolli1 [7]

Answer:

Attached image.

Slope = -1/3

y-intercept = (0,5)

8 0

2 years ago

Solve the inequality <br> 29-2(3-5w) 13

valentinak56 [21]

Answer:

29-2(2w)13

29-2(26w)

29-52w

w=52÷29

7 0

3 years ago

HOMEWORK HELP NEED TO KNOW

Thepotemich [5.8K]

5 is b because 3/6 is equivalent to 1/2
6 is a because 1/6 is less than half

5 0

3 years ago

Read 2 more answers

Work out the percentage change when 1.20 is increased to 1.80

exis [7]

Answer:

Step-by-step explanation:

PERCENT CHANGE

The percentage change from 1.20 to 1.80 is 50 %

Our percent calculator uses this formula:

((y2 - y1) / y1)*100 = your percentage change

(where y1=start value and y2=end value)

((1.80 - 1.20) / 1.20) * 100 = 50 %

8 0

3 years ago