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3 years ago

Don’t know if I am right.

Mathematics

1 answer:

ExtremeBDS [4]3 years ago

4 0

The answer is 14 centimeters

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-16t^2+20t+65 Quadratic Formula

Shalnov [3]

The value of T is

$\frac{-5+\sqrt{285} }{8}$ OR $\frac{-5-\sqrt{285} }{8}$

Step-by-step explanation:

Assumption: find the values of t

1. Equation is $-16t^{2}$ +20t+65

2. Identify values of a, b and c

a = -16
b = 20
c = 65

3. Write the quadratic formula

t = $\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

4. Substitute the values of a, b and c in the formula

t = $\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

t = $\frac{-20±\sqrt{20^{2}-4(-16)(65) } }{2(-16}$

5. Solve to find the possible values of t

t = $\frac{-20±\sqrt{20^{2}-4(-16)(65) } }{2(-16}$

$\frac{-5+\sqrt{285} }{8}$ OR

$\frac{-5-\sqrt{285} }{8}$

Keywords: Quadratic

Learn more about quadratic at

#LearnwithBrainly

7 0

3 years ago

Read 2 more answers

In a new scale drawing of the same room, the length of the room measures 4 inches. What is the scale of the new drawing?

nirvana33 [79]

Answer:

6 feet = 1 inch

Step-by-step explanation:

The actual length of the room = 24 feets

The new scaled lengtb of the room = 4 inches

The scale of a drawing = actual length / scaled or model length

Hence, scale used = 24 feet / 4 inch = 6 feet / 1 inch

The scale of the new drawing :

6 feet : 1 inch

6 feet length of actual room length is equivalent to 1 inch length on the drawing

6 0

3 years ago

The race speeds for the top eight cars in a 200-mile race are listed below. Use the range rule of thumb

koban [17]

Answer:13.4

Step-by-step explanation:idk what the range rule of thumb is but I just found the range. 189.2-175.8=13.4

7 0

4 years ago

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What is the intermediate step in the form (x+a)^2=b as a result of completing the square for the following equation? Please help

barxatty [35]

Answer:

${( \bold {\purple{ \boxed{ x + 7}}})}^{2} = \: \bold {\purple{ \boxed{ 9}}}$

Step-by-step explanation:

$- 2 {x}^{2} - 28x = 80 \\ \\ - 2( {x}^{2} + 14x) = 80 \\ \\ {x}^{2} + 14x = - 40 \\ \\ {x}^{2} + 2.x. \bold{ \red{7 }}+ 49 = - 40 + 49 \\ (add \: square \: of \: 7 \: both \: sides)\\ \\ {x}^{2} + 14x + {7}^{2} = 9 \\ \\ {( \bold {\purple{ \boxed{ x + 7}}})}^{2} = \: \bold {\purple{ \boxed{ 9}}}$

6 0

3 years ago

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.

Rama09 [41]

Answer:

Step-by-step explanation:

math

3 0

3 years ago