Answer:
-4 or 5
Step-by-step explanation:
let number be x
x²-x=20
Rearrange
x²-x-20=0
(x+4)(x-5)=0
Separate
x+4=0, x-5=0
x=-4 or 5
Answer:
$141.33
Step-by-step explanation:
He gave $100 to one fried and 158.67 to another
100+158.67=258.67
just fyi, if you spend x points on question, each user gets x/2 points (rounded up or down, I don't remember)
simple interest formula is
I=PRT
I=interest
P=principal
R=rate in decimal
T=time in years
assuming you mean that the principal is $2500 and not 2500 cents or 2500 of some other currency
interest=500
R=4%=0.04
I=PRT
500=(2500)(0.04)(T)
500=100T
divide both sides by 100
5=T
answer is 5 years
C is answer
The heat released or absorbed by a substance is calculated through the equation,
H = mcpdT
where H is teh heat,
m is the mass,
Cp is the specific heat, and
dT is the temperature difference
In this item, since both nails are identical, m and cp for both nails are equal such that the equation can be expressed as,
mcp(95 - x) = mcp(x - 15)
where x is the final temperature. Solving for the value of x from the equation derived above will give us a final answer of 55 degrees C.
Answer: 55°
Okay so start by finding the cost of the sandwich and the drink together. Once you have that number you need to find what 7% (or 0.07) or that number is. HINT it should be less than $0.50. Add this 7% to your sandwich-drink total and ta-da!!!
