5 and 25
Step-by-step explanation:
18 cookies because the cost was 5 and he sold 18 which makes 90 dollars
Answer:
<h3>
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Step-by-step explanation:
Distribute 6 through the parentheses
Add the numbers
Move constant to right hand side and change it's sign
Calculate
Divide both sides of the equation by -6
Calculate
Hope I helped!
Best regards!!
Answer:
Step-by-step explanation:
let : x The length and y the width you have this system :
xy =60....(1)
x = y+10...(2)
put the value for x in (1): (y+10)y =60
the quadratic equation is : y² +10y - 60 = 0
Δ =b² - 4ac a = 1 b= 10 c= - 60
Δ =10² - 4(1)(-60) = 324 =18²
y 1 = (-10-18)/2 negatif...... refused
y 2 = (-10+18)/2 =4
the width is 4
Answer:
= 5
Step-by-step explanation:
20 - 3(5)
20 - 15
= 5
