Answer:
x = √11
Step-by-step explanation:
2x² - 1 = 21
add 1 to both sides
2x² - 1 + 1 = 21 + 1
simplify
2x² = 22
x² = 22 / 2
x = √11
Answer:
- 7040 yards
- zeros are place holders
Step-by-step explanation:
Each mile is 1760 yards, so 4 of them is ...
4 × 1760 yards = 7040 yards
__
This number is written as a decimal number in a "place value" system, so the position of the digit in the number tells its value.
In order for the 7 to indicate 7 thousand, it needs to be in the "thousands" place in the number. The 0s in the hundreds and units places are called "place holders" because they ensure the other digits appear in their proper places in the number.
__
If it were written in Roman Numerals, it would be 
. In this system, the letter tells its value (and "place" comes into account in XL, which means X is subtracted from L). The system of Roman Numerals has no zeros, and doesn't need them.
The answer is 45, now go... answer that question before your time is up!
Answer: B. quadrilateral
Step-by-step explanation:
A quadrilateral is used to describe polygons with four sides. Polygons are two dimensional shapes that are closed. and have sides that are straight.
Parallelograms, rectangles, rhombuses, trapezoids are all four sided polygons as they are closed and have straight sides and so fall under the umbrella term for shapes with four sides, Quadrilateral.
58.4 rad. The clock shows up to 12. Divide 360/12 to get degrees per 5 mins. Then multiply it by five and convert to rad
