∣2x+7∣ for x=-4
Use the substitution method
∣2*-4+7∣
Mutiply first then add +7
∣2*-4∣= -8
∣-8+7∣= -1
Whenever there is a negative number for absolute value , the number becomes a + positive number.
∣-1∣= 1
Answer:
1
See attachment for your answer:
Answer:
Step-by-step explanation:
x² = 19x + 12
⇔ x² - 19x - 12 = 0
Calculating the discriminant :
b² - 4ac = (-19)² - 4×1×(-12) = 409
The discriminant is positive ,then the equation has two solutions.
Answer:
x=7/3
Step-by-step explanation:
3(x-4)=-5
3x-12=-5
3x=7
x=7/3
Answer:
C= 1/(2ax+2aw)
Step-by-step explanation:
C=1/2x(a+w)
Multiply a and w by 2x. Take note of the sign.
C= 1/(2ax+2aw)
when writing your answer, you don't need the brakets. I just put them so you'd understand that all those characters in the bracket are the denominator.
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