Answer:
$40
Step-by-step explanation:
substitute numbers:
20 + (10x3)
20+30= 40.
Answer:
b
Step-by-step explanation:
just add 3 until you get to the nineteenth one thats the hard way tho there is probably an easier way
Answer:
x = 2.4
Step-by-step explanation:
x*15 = 9 * 4
15x = 9 * 4
15x = 36
x = 2.4
Gruop x terms
(x²-8x)+3=0
take 1/2 of linear coefient and square it
-8/2=-4, (-4)^2=16
add negative and positive inside
(x²-8x+16-16)+3=0
factor perfect square
((x-4)²-16)+3=0
expand
(x-4)²-16+3=0
(x-4)²-13=0
add 13 both sides
(x-4)²=13
answer is C
