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tigry1 [53]
2 years ago
13

Find the value of X.

Mathematics
2 answers:
ASHA 777 [7]2 years ago
8 0
The value of x is 15
zhuklara [117]2 years ago
6 0

Answer:

15

Step-by-step explanation:

use pathagorean theorem

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Which quadratic equation has roots –2 and 1/5?
AysviL [449]

Answer:

The equation 5x^2\:+\:9x\:-\:2\:=\:0 has roots –2 and 1/5.

Hence, the option 'a' is the correct answer.

Step-by-step explanation:

Checking the equation

5x^2\:+\:9x\:-\:2\:=\:0

putting x = -2 in the equation

5\left(-2\right)^2\:+\:9\left(-2\right)-\:2\:=\:0\:

2^2\cdot \:\:5-9\cdot \:\:2-2=0

2^2\cdot \:5-18-2=0

20-20=0

0=0

L.H.S=R.H.S

putting x = 1/5 in the equation

5\left(\frac{1}{5}\right)^2\:+\:9\left(\frac{1}{5}\right)-\:2\:=\:0\:

5\left(\frac{1}{5}\right)^2+9\cdot \:\frac{1}{5}-2=0

\frac{1}{5}+\frac{9}{5}-2=0

2-2=0

0=0

L.H.S=R.H.S

As putting x = -2 and x = 1/5 satisfy the equation.

Therefore, the equation 5x^2\:+\:9x\:-\:2\:=\:0 has roots –2 and 1/5.

Hence, the option 'a' is the correct answer.

4 0
2 years ago
Solve 6y2-5y-6 = 0 using the quadratic formula.
sergejj [24]

Answer:

Ay=3 over 2 or y=-2 over 3

Step-by-step explanation:

the quadratic formula: y={-b±√(b²-4ac)}/2a

In the equation 6y²-5y-6= 0, a=6, b=-5, c= -6

Substituting for the values in the formula we get:

{-(-5)±√[(-5²)-4(6)(-6)}/2(6)

{5±√169}12

={5±13}/12

(5+13)/12=3/2 or (5-13)/12= -2/3

4 0
3 years ago
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Write a 2-digit number using digits 2,9,4 draw a quick picture to show the value of your number
larisa [96]
Get the app “Quizlet” search up your question and it will give you an answer!
3 0
3 years ago
HELP ME PLEASE!!!!!
son4ous [18]

Answer:

I think the answer (-2, 6)

8 0
3 years ago
There are 11.5 ounces of cereal in a container. Additional cereal is poured into the container at a rate of 2.25 ounces per seco
KatRina [158]

Answer:

13.........

Step-by-step explanation:


5 0
3 years ago
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