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juliopejfuhrf7336
13.10.2019 •
Mathematics
What is the x-intercept h=-16t^2+20t+6?
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Ответ:
see explanation
Step-by-step explanation:
To find the intercepts equate h to zero, that is
- 16t² + 20t + 6 = 0 ← divide all terms by 2
- 8t² + 10t + 3 = 0 ← multiply through by - 1
8t² - 10t - 3 = 0 ← factor the quadratic
Consider the factors of the product of the coefficient of the t² term and the constant term which sum to give the coefficient of the t- term
product = 8 × - 3 = - 24 , sum = - 10
Factors are - 12 and + 2
Use these factors to split the middle term
8t² - 12t + 2t - 3 = 0 ( factor the first/second and third/fourth terms )
4t(2t - 3) + 1(2t - 3) = 0 ← factor out (2t - 3)
(2t - 3)(4t + 1) = 0
Equate each factor to zero and solve for t
2t - 3 = 0 ⇒ 2t = 3 ⇒ t =![\frac{3}{2}](/tpl/images/0314/8687/dbf42.png)
4t + 1 = 0 ⇒ 4t = - 1 ⇒ t = -![\frac{1}{4}](/tpl/images/0314/8687/0d86b.png)
Intercepts are (-
, 0) abd (
, 0)
Ответ:
7, and 7√2
Step-by-step explanation:
The angle ratios are 1.5 : 1.5 : 3, so there are
1.5 + 1.5 + 3 = 6 total parts. There are 180° in a triangle, so we have
6x = 180
x = 30
Each part is 30°,
1.5 becomes 45° (30 plus half of 30)
3 becomes 90°
There are 2 angles with a ratio of 1.5, so we have a 45° - 45° - 90° triangle.
The side opposite the smallest angle is 7, there are angels with the least measure, so there are 2 sides that are 7.
The hypotenuse of a 45° - 45° - 90° triangle is larger than the legs by a factor of √2, so the hypotenuse is 7√2