- 8(7k-5) + 7(7k-7) = 1 - 5k - k - 7
- 56k + 40 + 49k - 49 = 1 - 6k - 7
13k = 3
k = 3/13
i am a mathematics teacher. if anything to ask please pm me
12x + 5 - 4x + 2x² =
= 2x² + 12x - 4x + 5 = <u>2x²</u><u> </u><u>+</u><u> </u><u>8x</u><u> </u><u>+</u><u> </u><u>5</u>
Answer:
Alloy = 12.6 lbs.
Step-by-step explanation:
( 2/7 ) = ( Nickel /4.9)
Nickel = 1.4 lbs.
Ratio of Copper to Zinc:
( 9/7 ) = ( Copper /4.9)
Copper = 6.3 lbs.
Alloy = Zinc + Nickel + Copper
Alloy = 4.9 lbs. + 1.4 lbs. + 6.3 lbs.
Alloy = 12.6 lbs.
The correct answer is c (x-1)^2=8
Answer:
5 and -4
Step-by-step explanation:
if we multiply 5 and -4 we are given the product of -20. When we add the two, we get 5-4= 1. Therefore, our answer is 5 and -4
