This is a simultaneous system of two linear equations with two unknowns, as the number of unknowns equals the number of equations, we can solve it:
y = 5x + 21
y = -7x - 15
we can equate both equations, given the fact that both are equal to y:
y = y
5x + 21 = -7x - <span>15
</span>and solving for x:
5x + 7x = -15 - 21
12x = -36
x = -36/12
x = -3
then we substitute this result in the original equation:
y = 5x + <span>21
</span>y = 5(-3) + <span>21
</span>y = -15 + 21
y = 6
hence the solution is x = -3 and y = 6
Answer:
The answer should be 64.21 or 64
Step-by-step explanation:
Help this Helped
Answer:
That sounds like an awesome book idea; then you go on to explain the adventures in the library.
Step-by-step explanation:
The sum of 7 to the 9th power and y is expressed as 7⁹ + y
This statement will result in an exponential equation since we will have a base and an exponent
- 7 raise to the 9th power is expressed as 7⁹
- Taking the sum of the result and y;
- The final expression will be 7⁹ + y
Hence the sum of 7 to the 9th power and y is expressed as 7⁹ + y
Learn more here: brainly.com/question/11610038
