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melisa1 [442]
3 years ago
14

Is negative 19 a solution for 75 + 4x = 3?

Mathematics
1 answer:
Artemon [7]3 years ago
6 0

Answer:

x=-5.143 or -\frac{72}{14}

Step-by-step explanation:

Subtract 75 from 3 and you get -72

-72=4x

x=-5.143

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Which are the solutions of the quadratic equation x^2=-5x-3
frutty [35]
The correct answer would be \frac{-5 +/-  \sqrt{13} }{2}

In order to solve for this you must first get the equation equal to 0. 

<span>x^2=-5x-3 ----> add 5x to both sides. 
x^2 + 5x = -3 ----> add 3 to both sides.
x^2 + 5x + 3 = 0

Now knowing this we can use the coefficients of each one in descending order of power as a, b and c. 

a = 1 (because it is the coefficient to x^2)
b = 5</span> (because it is the coefficient to x)
c = 3 (because it is the end number)

Now we can plug these values into the quadratic equation. 

\frac{-b +/-  \sqrt{b^{2} - 4ac } }{2a}

\frac{-5 +/- \sqrt{5^{2} - 4(3)(1) } }{2(1)}

\frac{-5 +/- \sqrt{13} }{2}

And those would be your two answers.
5 0
3 years ago
find the measures of an angle between 0°and 360° coterminal with an angle of -271° in standard position
alisha [4.7K]

We are given angle in standard position as

\theta=-271

we know that one complete rotation is 360

so, to find angle between 0 and 360

so, we will add 360 to get co-terminal angle

so, co-terminal angle is

=\theta +360

now, we can plug value

co-terminal angle is

=-271 +360

=89.............Answer


3 0
3 years ago
Reposted:<br> thanks for the help!<br> have a nice day ;)
Marina CMI [18]

Answer:

a) 11

c) 18

d) -25

Step-by-step explanation:

a)

Substitute: 3|-2| + 5|-1|

Absolute value is positive: 3(2)+5(1)

Simplify: 6+5

Simplify: 11

c)

Substitute: 4|-2| +8-(-2)

Absolute value is positive: 4(2)+8-(-2)

Simplify: 8+8+2

Simplify: 18

d)

Substitute: -3|-5|+2(-5)

Absolute value is positive: -3(5)+2(-5)

Simplify: -15-10

Simplify: -25

7 0
3 years ago
Read 2 more answers
What class interval is appropriate for the measurement values reported as 4.1 cm?
jekas [21]
4.1 is a measure to the nearest tenth.

The value preceding it is 4.0 while the value following it is 4.2

The midvalue of 4.0 and 4.1 is 4.05 while the midvalue of 4.1 and 4.2 is 4.15

Therefore, the class interval of a <span>measurement values reported as 4.1 cm is 4.05 to 4.14 cm</span>
4 0
3 years ago
!!!!!!! Why isn't A the correct answer? I am having trouble to reason why A is wrong so please help if can!
docker41 [41]

Answer:

d.  x = -3

Step-by-step explanation:

<u />\sqrt{(x + 3)}÷ (x+8)(x-2) = 0

f(x) / g(x) = 0

Variable x cannot be equal to any of the values −8,2 since division by zero is not defined. Multiply both sides of the equation by (x−2)(x+8).

<u />\sqrt{(x + 3)} = 0 ------ square both sides

x + 3 = 0

solve for x:

x = -3

4 0
4 years ago
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