What is the value of the expression –12 – 3 + 9?

Mathematics

1 answer:

yKpoI14uk [10]2 years ago

5 0

–12 – 3 + 9
(-12 - 3) + 9
-15 + 9
-6

You might be interested in

One-third times the difference of a number and 5 is -2/3

fomenos

The answer is 3. 1/3(x-5)= -2/3. Multiply by 3 on both sides. Add five and you get 3

3 0

2 years ago

HELP!!!!

Andrei [34K]

Answer: 90° , 60° and 30° .

Step-by-step explanation:

Given : In a right triangle with a leg of 4 units and a hypotenuse of 8 units.

One angle should be 90°. (A right triangle has a 90° angle.)

Let the given leg is the side opposite to the angle $\theta$ in the triangle.

Then by trigonometry , we have

$\sin\theta=\dfrac{4}{8}=\dfrac{1}{2}$ [Sine of an angle is the ration of the side opposite to the angle and the hypotenuse of a right triangle.]

Also , $\sin 30^{\circ}=\dfrac{1}{2}$

$\Rightarrow\ \theta = 30^{\circ}$

Let x be the measure of the third angle.

BY Angle sum property of triangle , we have

$90^{\circ}+30^{\circ}+x= 180^{\circ}\\\\ 120^{\circ}+x= 180^{\circ}\\\\ x=180^{\circ}-120^{\circ}\\\\ x= 60^{\circ}$

Therefore , the measures of all angles in the triangle : 90° , 60° and 30° .

4 0

2 years ago

Need answer asap algebra 2

DerKrebs [107]

Answer:

Step-by-step explanation:

The vertex is at (2,1) The two is the important feature to start with. That means that the point is 2 away from the y axis. That goes to the left to get to the y axis.

The get the mirror image of that 2, you have to go two to the right to get to the point that mirrors (0,4). The y value has to be the same as the y intercept. So x must be 4 and y needs to be 4.

The answer is (4,4)

In case you are interested, the graph (given below) is y = 0.75 (x - 2)^2 + 1

The y intercept is 0,4 and the vertex is 2,1