Answer: 25% chance
Step-by-step explanation:
4 cards total with only one having number 7 on it so choosing one card...
1/4=.25 or 25%
Have a 1 in 4 chance.
I think the most simple way to solve this is by writing out a few general expressions;
$40 - $10 = $30
$30 - 4x = y
$10 + y = z
X = Amount of Smoothies
Y = Total Amount left
Z = Total + the $10
For question 6
Make x for first one subject of formulae
then it becomes
x=-2y
Substitution means replace your answer in the second part
since x=-2y
3(-2y) +4y = 4
-6y+4y=4
-2y=4
y= 4/-2
y=-2
Now to find x,replace the answer for y in one in the equation
so i replace y=-2 in the first part
x=-2y
x= -2(-2)
x=4
Therefore x=4 and y=-2
To check your answer replace x and y by the values you got and check if you get same answer.
Answer:
$2.5
Step-by-step explanation:
10% in decimal form is 0.1 which is multiplied by 25 to find 10%.