Answer:
-9
Step-by-step explanation:
2(-x)² - 5 = 157
2x² - 5 = 157
add 5 to each side of the equation:
2x² = 162
divide both sides by 2:
x² = 81
√81 = 9 or -9
Answer:
It would be nice to have the equation and/or picture, however I am giving a list of common pillow sizes for reference.
Step-by-step explanation:
Pillow size: Metric Measurements (cm) Imperial Measurements
Standard (51 x 66 cm) 20" x 26"
Queen (51 x 76 cm) 20" x 30"
King (51 x 92 cm) 20" x 36"
European square (66 x 66 cm) 26" x 26"
To find how many cm are in a ft, you have to use the method of unit rate:
so we know that 12 in. equals a ft. so,
1 ft
------
12 in.
and 2.25 cm equals an in. so,
1 in.
-------
2.54cm
then we put the rates together and get:
1ft 1 in.
---- X -------................we cancel out the in. units and get:
12 in. 2.54 cm
Solve and get 1 ft = 30.48 cm
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