Follow the directions to solve the system of equations by elimination. 8x + 7y = 39 4x – 14y = –68 Multiply the first equation t
2 answers:
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The equations which are sums of perfect cubes are as follows;
<h3>Perfect cubes;</h3>
Perfect cubes are the numbers that are the triple product of the same number.
We have to determine
Which are sums of perfect cubes?
1. The given equation is .
The equation can be written as;
All the terms in the expression are can be represented as perfect cubes.
2. The given equation is .
The equation can be written as;
In this, all the terms are not perfect cubes, some of them are squares.
3. The given equation is .
The equation can be written as;
All the terms in the expression are perfect cubes.
4. The given equation is .
The equation can be written as;
All the terms in the expression are perfect cubes.
5. The given equation is .
The equation can be written as;
In this, all the terms are not perfect cubes, some of them are squares too.
To know more about perfect cubes click the link given below.
Answer:
Option 2:
Step-by-step explanation:
Given:
From the triangle shown below;
A triangle QRS with angle QRS = 90°, ∠QSR = 30°.
Side QR = 5, SQ = 10 and RS = 5√3
Now, we know from trigonometric ratio that,
Here, opposite side of angle QSR is QR and Hypotenuse is the side opposite angle QRS which is SQ. Therefore,
Therefore, the value of sine of 30° is one-half. So, second option is correct.
