We have two of the three angles in terms of x while the third angle is not given directly. Since it is a right-angled triangle, one of the angles equals 90°.

So the angles of the triangle are $3x,$ $4x-1,$ and $90.$

Step 2:

Now, we substitute all the angles to a sum of 180 to determine the value of x.

$3x + 4x - 1 + 90 = 180.$

$7x = 91, x = \frac{91}{7} = 13.$

So x = 13°. The angles are

$3x = 3 (13) = 39, 4x-1 = 4(13) - 1 = 51.$

The angles of the triangle are 39°, 51°, and 90°.

7 0

3 years ago

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Which measurements most accurately describe the weight of a truck?

sergij07 [2.7K]

I would say b
hope it helped!

7 0

3 years ago

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What are the solutions of the quadratic equation (x + 3)2 = 49? A. O x = 2 and x = - 10 B.O.x = 4 and x = -10 C.O x=-2 and x = -

tatyana61 [14]

Answer:

B. x = 4 and x = -10

Step-by-step explanation:

First, expand the equation

(x + 3)² = 49

(x + 3)(x + 3) = 49

x² + 6x + 9 = 49

Subtract 49 from both sides

x² + 6x -40 = 0

Factor

(x + 10)(x - 4) = 0

Solve

x + 10 = 0

x = -10

x - 4 = 0

x = 4

So, the correct answer is B. x = 4 and x = -10

8 0

3 years ago