Answer:
x=10 x=-4
Step-by-step explanation:
x^2 +6x = 40
subtract 40 from each side
x^2 +6x -40 = 0
what numbers multiply to -40 and add to 6
-10 *4 = -40 -10 +4 = 6
(x-10) (x+4) = 0
using the zero product property
x-10 = 0 x+4 =0
x=10 x=-4
Answer:
Mary is 7
Step-by-step explanation:
If their ages combined equals 21 and john is twice Mary’s age then johns age takes up 2/3 of 21. that would b 14. 14 is 2 x 7. and Mary is 7. 14+7=21. Mary is 7 years old
Copy an angle by creating acts with a compass
Answer:
The numbers are --> x = -4 + √21 i and x = -4 — √21 i
See the attachment for my step-by-step explanation
(solution is in red box)
X= (-40,0)
y= (0,15)
May God bless you and your family
