Answer:
Which of the following is a common sign that a chemical change has occurred?
Step-by-step explanation:
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Answer:
5 minutes
Step-by-step explanation:
hope it helps
I = PRT
21 = 200 * 0.035 * T
21 = 7T
3 years = T
Answer:
length = 22
width = 13
Step-by-step explanation:
Perimeter of a rectangle is given by the formula
P =2(l+w)
we know the length is x
width is x-9
P =70
Substituting this into the equation
70 = 2(x+x-9)
Combining like terms
70=2(2x-9)
Distributing the 2
70 = 4x-18
Adding 18 to each side
70+18 = 4x-18+18
88 = 4x
Divide by 4
88/4 = 4x/4
22= x
we know the length is x
length = 22
width is x-9
width = 22-9= 13
Answer:
11x-2
Step-by-step explanation:
4x-3+7x+1
then
4x+7x-3+1
goes to
4x+7x-2
Answer: 11x-2
