i can type 19 words in 38 seconds
how many can i type in60 seconds?
A)25
B)30
C)40
D)50
Set up a proportion, cross-multiply, and solve for x.
19/38 = x/60
Nope.
How did you get those answers? Please show your work so that I can see what you don't understand.
19*38=722 i don't get it
Thanks.
Your proportion is:
19/38 = x/60
Cross multiply means to multiply the first and last terms together. Then multiply the middle terms together.
1140 = 38x
Use simple algebra to find the value of x. The equation means what unknown number when multiplied by 38 equals 1140?
1140 divided by 38 = 30
If you're still confused, please study the proportions part of this site carefully.
http://www.homeschoolmath.net/teaching/proportions.php