He must get a 65 as a minimum grade on his third test to get an average of 70.
Equation is
85 + 60 + x
------------------- greater than or equal to 70
3
Answer:
$196
Step-by-step explanation:
Lets assume,
cost of a belt = 'x'
cost of a pair of pants = 'y'
Now, According to the question;
- x + y = 490;
- cost of a bag = twice the cost of belt = 2x;
- cost of a pair of pants = twice the cost of bag
⇒ y = 2×2x ⇔ 4x
hence, by subtituting the values in equation' we get;
⇒ x + 4x = 490
⇒ 5x = 490
⇒ x = 98
So, the difference between the cost of the pair of pants and the bag ;
⇒ y - 2x
⇒ 4x - 2x
⇒ 2x = 2×98 = 196.
N+n+2+n+4=54
3n+6=54
3n=48
n=16
16, 18, 20
Answer:
56m cubed
Step-by-step explanation:
7m×2m×4m=56m
Move all to one side, make other side zero, and I like x^2 term to be positive
5-11x^2=-8x
add -5+11x^2 to both sides
0=11x^2-8x-5
4+3x=-x^2+2
add x^2-2 to both sides
x^2+3x+4+2=0
x^2+3x+6=0
x(x+2)=-5
add 5 to both sides
x(x+2)+5=0
x^2+2x+5=0
(2x-1)^2=1
expand
(2x-1)(2x-1)=1
4x^2-2x-2x+1=1
minus 1 from both sides
4x^2-4x=0
