Answer:
60 push-ups
Step-by-step explanation:
Set up a ratio to represent the problem:
Molly : Liza
10 : 15
40 : ?
How did we get from 10 to 40?
You multiply by 4. Therefore, multiply by 4 on both sides of the ratio.
10 : 15
x4 x4
40 : 60
So, Liza does 60 push-ups while Molly does 40.
If the 5 of them weigh 1/4 of a ton
then 1 of them weigh x
5/1 = 1/4//x Do you see what happens? Just by writing down the givens you get a proportion. It will work better for you if you change the 1/4 to 0.25
5/1 = 0.25/x Now it looks like an ordinary proportion. Cross multiply
5x = 0.25*1 divide by 5
x = 0.25/5
x = 0.05 tons. We better change this to pounds.
1 ton = 2000 pounds
0.05 ton = x
1/0.05 = 2000/x Cross multiply
x = 2000 * 0.05
x = 100 pounds.
Answer:
D ( x -2i sqrt(2)) ( x+ 2i sqrt(2))
Step-by-step explanation:
x^2 + 8
We want to factor so rewrite as squares
x^2 + (2sqrt(2))^2
Rewrite with a subtraction sign i^2 = -1
x^2 - (2*i*sqrt(2))^2
This is the difference of squares
a^2 - b^2 = ( a-b) (a+b)
( x -2i sqrt(2)) ( x+ 2i sqrt(2))
3 / 8 % = ( 3 / 8 ) / 100 = ( 3 / 8 ) * ( 1 / 100 ) = 3 / 800 ;
Answer:
1.3
Step-by-step explanation:
The square root of 1.69 is 1.3.
