Answer:
Step-by-step explanation:
8 must be the hypothenuse
4 and 7 are side
check Pythagorean Th. if works is a right triangle if not is not
8²=4²+7²
64 = 16+49
64 = 65 false
the lengths do NOT form a right triangle
To express any number as a decimal, just multiply it by 100 .
Often, an easy way to do that is to move the decimal point
two places to the right.
2.50 = <em>250%</em>
Answer:
12
Step-by-step explanation:
12
Answer:
3x + 10cm
Step-by-step explanation:
This is calculated as:
Length of Tom's pencil - Length is Ellen's pencil
Length of Tom's pencil: 5x+25cm long.
Length of Ellen's pencil : 2x+15cm long.
(5x + 25)cm - (2x + 15)cm
5x + 25 - 2x - 15
5x - 2x + 25 - 15
3x + 10 cm
Therefore, Tom's pencil is 3x + 10cm longer is than Ellen's.
