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3 years ago

Simplify 3(2x-2)-2(x-2) A.3x-3 B.3x-4 C.4x-2 D.4x-4

Mathematics

2 answers:

Black_prince [1.1K]3 years ago

5 0

The answer is c 4x-2

Artemon [7]3 years ago

4 0

C 4x-2 that’s the answer

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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

3 years ago

Need help with this problem

Romashka-Z-Leto [24]

3x = 4x + 2

-4x -4x

-1x = 2

---- -----

-1 -1

x = -2

Check:

3(-2) = 4(-2) + 2

-6 = -8 + 2

-6 = -6

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Dafna11 [192]

Answer:

Step-by-step explanation:

288 divided by 6 is 48 and how you get mph is todal miles in 1 hr

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2 years ago

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galina1969 [7]

14 over 4509 would be an equvilent fraction

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3 years ago

Read 2 more answers