lesson 1
What is an integer?
is a positive and a negative numbers.
What is the proportion equation?
are questions that represent equal rations
diego starts a 12 hour roud trip with his phone battery charge at 75% given his normal usage will his phone last the whole trip
750/100/15=x/15/ 15
11.25 = X
75%of 15 is 11.25 hours
an automatic dog feeder dispenses 2/5 cups of dog food each day.what expression can the dog owner use to determine the amount of food left in the feeder after d days
draw a bar diagram to represent the amount of food remaining in the feeder after d days
10(g+3.50)
(10.g)+(10.3.50)
75 for both
What is a terminating decimal?
Its a decimal that ends in zero
What are the constants of proportionality?
Is the constant multiple that relates proportional quantities x and y is the value of the ratio of y and x
many sztates have meal tatx that is proportional to total specnt on food and beverages in one state the meal tax is 8.44% how much tax will a customer pay if food and beverages total 54$
part=precent=whole
tax=precent.bill
T=4.5576
the customer will pay $4.56 intax
the student country has spent $300 on the supplies needed to spend a dance concert fundraiser three country members wrote the following expenses represent the total amount raised for the t tickets sold can they all be correct in explaining
6t-300 6(t-50) -300+6t
t-7.5>-12.5
t-7.5+7.5>-12.5
t>-5
-5f
What is a repeating decimal?
It has a decimal expansion that repeats the same digit or blocks of digits without ends.
Evie is 2 year old Josh is 6 years old
how many times older is josh
josh is 3 time old as evie
victoria opens a savings account with a deposit of 300$ she will earn 1.6% simple interest each year on her money how much will she earn in 5 years
an interest rate is a percentage used to calculate interest on the principle
interest amount= interest rate ' principle
s=0.016.300
s=4.80
write an equivalent expression
-3(7+5g)
(x+7)+3y
2/5-1/5 . x
5x+27=122
5x+27-27=122-27
x=19
What are additve inverses?
Two numbers that have a sum of zero or opposites.
what is a random sample
a sample at random
a full set of adult teeth includes 160% as many teeth as a full set of baby teeth how many teeth are there in a full set of adult teeth
160 on 100= t20
160 on 100 .20 t on 20.20
32=t
a full set of adult teeth includes 32 teeth
which expression is equivalent to t+4=3-2t?
t+7
-t+4+3y
6t
10t
4x-12=
16
what is generalized?
A rule for multiplication of integers or anything
what is a valid inference
its a valid guess
a present is one way to represent the relationship between two quantities generally that of a part to the whole
is 60 on 100
and x on 15
the diegram shows p+0.25p 25%
p+0.25p
its (1)p+0.25p=1.25p
25% more the 100% is the same as 125%
38+p<50
38+p-38<50-38
p<12