So, we divide 1200 by 25 to find out how many words per minute he types. 1200 / 25 = 48 So, he types 48 words per minute. Now, we multiply this by 45 to find out how many words he can type in 45 minutes. 48 x 45 = 2,160 Joseph can type 2,160 words in 45 minutes!
Answer:
96 cm^2
Step-by-step explanation:
All faces of a cube are equal in area.
Therefore the Formula for SA of a cube is 6*s^2
SA = 6*4*4 = 96
15 mph 5280 ft 1 hr
----------- * ------------- * ------------ = 1320 feet per min.
1 1 mile 60 min
You might want to make use of the fact that 60 mph = 88 ft/sec.
Answer:
22¹/²
Step-by-step explanation:
y/36=15/24
cross multiply
y×24=36×15
24y=540
divide both sides by 24
y=540/24
y=22¹²/²⁴
break it down
y= 22¹/²
Now if
, then both
and
. Adding two positive numbers gives another positive number, so
. Why this is useful will be apparent shortly.
Back to the identity:
Factorizing the left hand side, we have
Now, any number squared will be positive, which means the right hand side is necessarily greater than 0.
We showed earlier that
. So we understand that we have
The only way to multiply a number by a positive number to get yet another positive number is to have the first number also be positive, which means
and from this it follows that
in the provided region.
