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3 years ago

Basic compounds produce OH- ions when dissolved in water. true or false

Mathematics

1 answer:

Ket [755]3 years ago

4 0

Answer:

Step-by-step explanation:

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Simplify and write the trigonometric expression in terms of sine and cosine:

kicyunya [14]

Answer:

f(x) = + cosx or - cosx

Step-by-step explanation:

(2+tan^2x/sec^2x) -1 =(f(x))^2

=(( 1 + sec^2x)/sec^2x) -1

= 1 / sec^2x + 1 - 1

= 1 / sec^2x

= cos^2x

(f(x))^2 = cos^2x

f(x) = + cosx or - cosx

6 0

3 years ago

what is the equation in slope intercept form of the line that goes through (2,4) and is perpendicular to the line represented by

Andrej [43]

Answer:

$y = \frac{3x}{2}+1$

Step-by-step explanation:

The slope-intercept form of a straight line equation is y = mx + c, where m is the slope and c is the y-intercept of the line.

Now, we know that if two straight lines are perpendicular to each other then the product of their slopes will be -1.

So, the equation of a straight line which is perpendicular to the line $y = -\frac{2x}{3} +6$ will be $y= \frac{3x}{2}+ c'$ ....... (1), where c' is constant.

Given that the line (1) passes through (2,4) point.

Hence, $4 = \frac{3(2)}{2} +c'$

⇒ c' = 1.

Therefore, the final equation of the required straight line is $y = \frac{3x}{2}+1$ . (Answer)

5 0

3 years ago

Solve the following system. y = (1/2)x 2 + 2x - 1 and 3x - y = 1 The solutions are ( )and ( ) (remember to include the commas)

frozen [14]

$\begin{cases}y=\dfrac{1}{2}x+2x-1\\3x-y=1\end{cases}\\\\\\
\begin{cases}y=\dfrac{5}{2}x-1\3x-y=1\end{cases}\\\\\\
3x-\left(\dfrac{5}{2}x-1\right)=1\\\\3x-\dfrac{5}{2}x+1=1\\\\
3x-\dfrac{5}{2}x=0\\\\\dfrac{x}{2}=0\\\\x=0\\\\3\times0-y=1\\0-y=1\\y=-1\\\\\boxed{(x,y)=(0,-1)}$

<span>The solutions are (0) and (-1)</span>

8 0

2 years ago

Read 2 more answers

1) A furlong is 1/8 of a mile. What part of a mile is 6 furlongs?

Semmy [17]

Answer:

6/8 of a mile,

Step-by-step explanation:

if one furlong is 1/8 of a mile, the 6 shall be 1/8 added to itself 6 times, therefore it shall be 6/8.

5 0

3 years ago

Read 2 more answers

PLEASE ANWSER CORRECTLY!! I WILL MARK BRAINIEST!!

Pepsi [2]

Answer:

Since angle 1 = angle 3 (vert opp angles),

angle 1 = angle 3 = 180°-129° (adj angles on a str line)

= 51°

angle 4 = angle 2 = 129° (vert opp angles)

Hence,

angle 1 = 51°

angle 3 = 51°

angle 4 = 129°

8 0

3 years ago