F(x)=5x^3-2x^2+3
=5 2^3 - 2 2^2 +3
=5 (8) - 2 (4) +3
= 40 - 8 + 3
= 35
answer is A.35
The length of the altitude AD is 12 units.
<h3>How to find the height of a triangle?</h3>
The height of the triangle can be found as follows:
We have to find an angle using cosine law before we can find the height.
Therefore,
20² = 13² + 21² - 2 × 21 × 13 cos B
400 = 169 + 441 - 546 cos B
400 - 610 = - 546 cos B
-210 = - 546 cos B
cos B = -210 / -546
cos B = 0.38461538461
B = cos⁻¹ 0.38461538461
B = 67.3810899783
B = 67.38°
Hence,
sin 67.38° = opposite / hypotenuse
sin 67.38° = AD / 13
cross multiply
AD = 13 sin 67.38°
AD = 11.9999882145
AD = 12 units
learn more on triangle here: brainly.com/question/13387814
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1/5(25-5a)=4-a
⇔5-a=4-a
NO SOLUTION
Answer:
30 to 50 more feet
Step-by-step explanation:
Add up all the sides to find the perimeter of the shape for the pen:
18 + 22.5 + 5 + 4.5 = 50
Since 50 is less than 80 to 100, then Annie has 30 to 50 more feet she can use for the pen.
Answer: 2/3 as 4/5 is smaller amount than 2/3.
