Your answer should be 57 .7 I think its right
1/5(25-5a)=4-a
⇔5-a=4-a
NO SOLUTION
Answer:
$1.5 per gallon
Step-by-step explanation:
Unit rate is rate per gallon
$15/10gallons = $1.5 per gallon
Answer:
y = (x+4)^2 -19
Step-by-step explanation:
y = x^2 + 8x + 16 – 3 – 16
You are almost done with completing the square
y = (x^2 + 8x + 16) – 19
= (x+4)^2 -19
This is in vertex form y= a(x-h)^2 +k where (h,k) is the vertex
Answer:
D. 76.5
Step-by-step explanation:
The summation sign means that it is the sum of the expression for all values of n upto 6.
n = 2 below the summation sign means that n starts from 2.
∑(n-1)!/2 from n= 2 to n=6
= (2-1)!/2 + (3-1)!/2 + (4-1)!/2 + (5-1)!/2 + (6-1)!/2
= 1!/2 + 2!/2 + 3!/2 + 4!/2 + 5!/2
= 1/2 + 2*1/2 + 3*2/2 + 4*3*2/2 + 5*4*3*2/2
= 1/2 + 2/2 + 6/2 + 24/2 + 120/2
= 0.5 + 1 + 3 + 12 + 60
= 76.5
