bob

6 Questions
11 Answers

0

862

3

+46

math compitition

An object that is 260 lbs and 4 ft away from the fulcrum is exactly balance with a ballerina that is 80 lbs. how far away is the ballerina from the fulcrum

bob Feb 5, 2014

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968

2

+46

help plz

Which of the following statements is false?
choices
a. A conditional statement and its converse must have the same truth value.
b. A conditional statement and its contrapositive must have the same truth value.
c. A conditional statement’s read more ..

bob Jan 10, 2014

0

739

1

+46

help

What is the center of the circle with an equation of (x – 4)2 + (y + 1)2 = 9?
choices
a. (4, -1)
b. (-4, 1)
c. (4, 9) d. (-1, 9)

bob Jan 9, 2014

0

777

2

+46

help

Solve the system:
y = 2x2 - 4x - 4
x + y = -5
the choices are
a. {-6, 1} b. no real solution c. {(1, -6) and (0.5,-5.5)} d. [{1,6}, {-1,-6}]

bob Jan 9, 2014

0

1192

1

+46

probability

You entered a contest at a local restaurant. There are 3 grand prizes, 10 second prizes, and 40 third place prizes. If there are 200 entries, what is the probability that you will win second prize?
a. 1/20
b. 1/5
c. 1/12
d. 3/10 Im read more ..

bob Jan 7, 2014

0

731

2

+46

question in geometry

The volume of a rectangular prism is 115 cm3. If the length is doubled, the width is tripled, and the height is cut in half, what is the volume of the new prism?
answers
a. 115 cm3
b. 690 cm3
c. 230 cm3 d. 345 cm3

bob Jan 7, 2014

+46

0

3 into 2629
3 cant go into 2 but can go into 26
you get 8
then 22
you get 7
then you get 19
and you get 6
then you get 1 and it would be 876 and 1/3

bobFeb 5, 2014

+46

0

ok got it its 23 ft away

bobFeb 5, 2014

+46

0

you need to find all 2 digit #s with a 3 first

13; 23; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 43; 53; 63; 73; 83; 93
now determine if it is prime or not
13 prime
23 prime
30 not
31 prime
32 not
33 not
34 not
35 not
36 not
37 prime
38 not
39 not
43 prime
53 prime
63 not
73 prime
83 prime
93 not
8 2 digit #s with a 3 are prime

bobFeb 5, 2014

+46

0

you can divide 15 15/15 is 1 and 75/15 is 5
so it equals 1/5

bobJan 9, 2014

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0

4 2/3 +1 1/6 /1 1/4 + 1 7/8

5 5/6
---------
3 1/8

28/15
or 1 13/15

bobJan 9, 2014

+46

0

1. what is 976+959
2. what is 876-497
3.what is 678 times 32
4. 844532 times 99

1. 1935
2. 379
3. 21696
4. 83608668
is this suppose to be hard
Dude I'm in geometry and in 8th grade

bobJan 9, 2014

+46

0

d/7=14 original
d*1/7=14 same as original
*7 *7 Inverse of 1/7
d=91

bobJan 9, 2014

+46

0

what is it suppose to =??

it would be 28/3 though

bobJan 9, 2014

+46

0

ok????????????
what does this have to do with math

bobJan 7, 2014

+46

0

2/3 -3/5

first you balance the denominators

common denominator = 15

then you find what you multiplied to make it that denominator

5/5 x 2/3 3/3 x 3/5

10/15 -9/15

10/15 = 2/3 and 9/15 = 3/5
10/15 - 9/15 = 1/15

the answer is 1/15

bobJan 7, 2014

+46

0

the answer would be x= .5 or 1/2 because in the equation
3x-y =2
y=x-1
the next step would be to substitute the y for x-1.
so it would be 3x - (x-1) = 2
then the distributive property.
3x-x +1 = 2
2x+1=2
-1 -1
2x=1
--------
2
x=.5 or 1/2

bobJan 7, 2014