Transcript 90 - TeacherTube

OMG! Algebra is easy. First, an “expression” is just a number sentence.
For example, if you wanted to buy the Wii games and you didn’t know how
much these games cost you could show this “number expression” by
writing
3 x _________ . The blank is there because it’s what you don’t know, the
cost of each game. With algebra, instead of a blank you put a letter. It
could be any letter X, Z, G… Usually the letter is the first letter of the thing
you talking about. So to write an algebraic expression you would write:
3 x C.
3 because you want 3 games and C because you don’t know the Cost of
each game.
Mrs. Sweetland gives 3 bonus points for each extra-credit
problem correctly completed. If b stands for the number of
extra-credit problems correctly completed, which
expression is equal to the total number of bonus points?
• a. b x 3
• c.
b. b + 3
b ÷ 3 d. b - 3
• e. 3 > b
A because times usually all
wais goes first.
Find the value of y.
x-y=y
x = 10
•
•
•
•
•
A.
B.
C.
D.
E.
32
16
4
5
2
The answer is d
because 10 minus 5
equals 5.
You know how to find the sum of the angles of a polygon. The
sum of the angles for a triangle (3 sides) is 180. The sum of the
angles of a quadrilateral (4 sides) is 360. The sum of the angles
of a pentagon (5 sides) is 540. If “S” is the amount of sides,
which expression can be used to illustrate this way of finding the
sum of the angles of any polygon.
45
•
•
•
•
A. (S – 2) * 180
B. S + (2 + 180)
C. 180 * S
D. (360 x 2)
90
You add up the angles and the sum for
any triangle is 180
45
90
45
45
180
120
90
90
100
90
You add up the angles and
the sum for any square or
rectangle or 4 sided figure
and the sum is 380
90
90
90
90
360
100
90
110
110
You add up the angles and
the sum for any 5 sided figure
and the sum is 540
110
110
100
100
120
540
180
360
720
540
I know i am right because
first I gust guessed but
then I took seven twenty
divided by six and got one
twenty .then I took one
twenty times six and got
720 .first I started of with
this one to learn it because
is is a lot easy
100ft
First of all you should add all the numbers
that you do know so then once you get the
125ft question marks you can just add them to all
the other ones combined. the ones on the
top are 100 because you take 65 pulse
35.the to get this one you need to take
50 +75=125. then add it all up together to
get .
How much fencing is needed to
go around the perimeter of this
yard?
450ft
How much sod is needed to
cover this yard?
One angle of a RIGHT triangle is 30
degrees. Which expression shows how to
find the measure of the third angle?
???
30
90
A. 3* 180=A
B. 3 * 90 + 60=A
C. (360 / 3) - 90
D. 180 – 90 – 30=A
The answer is
Calvin’s little brother jumped up and down. “Here they come!”
shouted Calvin. Around the corner came the Thanksgiving
Day Parade. Half of the people were on floats; 25% were in
marching bands; clowns made up 1/8; TV stars made up 1/16;
and there were 10 city officials, or 1/16. How many people
were in the parade, and how many were in each group?
Thanksgiving
Parade
Fraction
Floats
Marching
Bands
Clowns
TV Stars
City
official
s
1\2
1\4
1\8
Decimal
Percent
Whole
Number/to
tal number
of people
.50 50%
.25 25%
1.25 12.5
%
1\16 .062 .025 10
5
%
1\16 .062 .025 10
5
%
1\2
1\8 clowns
Floats
1\16tv
stars
About how much of each hour does a radio program
schedule for weather?
A. 1/10
B. B. 2/10
C. C. 3/10
D. D. 5/10
E. E. 10/10
How many minutes of each hour does a radio program schedule for weather?