Answer:
A and E
Step-by-step explanation:
x²+3x-28=0
x²+7x-4x-28=0
x(x+7)-4(x+7)=0
(x-4)(x+7)=0
x=4, x= -7
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Answer:
Step-by-step explanation:
Equation 2x+15=x+15
x=2x+x ST = 15+15 = 30
Answer:
Step-by-step explanation:
Let the numbers be x and y
<u>Three times the first number minus two times the second number equals -7:</u>
<u>The second number equals one less than negative three times the first number:</u>
<u>Substitute y in the first equation and solve for x:</u>
- 3x - 2(-3x - 1) = -7
- 3x + 6x + 2 = -7
- 9x = -9
- x = -1
<u>Find the value of y:</u>
- y = -3(-1) - 1
- y = 3 - 1
- y = 2
The numbers are -1 and 2
Answer:
f(x) = -18
Step-by-step explanation:
f(x) = 3x - 6
f(-4) = 3(-4) - 6
f(-4) = -12 -6
= -18
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Answer:
Step-by-step explanation:
We want to write the conjugate of the complex number:
Recall that the conjugate of a complex number in the form <em>a</em> + <em>b</em>i is <em>a</em> - <em>b</em>i, and vice versa.
We can rewrite our complex number as:
Hence, <em>a</em> = 0 and <em>b</em> = 6.
Then its conjugate will be:
