There will be 23 layers of brick, because 7500/321 = 23 with 117 leftover.
Answer:
-(7x + 4)(3x - 2)
Step-by-step explanation:
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Answer:
20√3 cm
Step-by-step explanation:
Altitude of an equilateral triangle splits it into 2 equal right triangles, it bisects the base and the angle opposite to the base.
<u>Let the altitude be x. Then as per Pythagorean theorem:</u>
- x² = 40² - (40/2)²
- x²= 1600 -400
- x²= 1200
- x= √1200
- x= 20√3 cm
<u>Correct choice is</u> the second one
The angle to the left of angle 1 is 70, so angle 1 is equal to 180 - 70 - 70 which is 40,
