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Daniel [21]
2 years ago
15

Find the value of x in the isosceles triangle shown below

Mathematics
2 answers:
olasank [31]2 years ago
7 0
X=10 you’ll have to break down your equation to solve the square root.
egoroff_w [7]2 years ago
6 0

Answer:

x = 10

Step-by-step explanation:

if there 2 same triangle then they are right triangle

By using Pythagorean theorem for 1 of right triangle, we have

\sqrt{74} ^{2} = 7^{2} + (\frac{x}{2}) ^{2}

74 = 49 + \frac{x^{2}}{4}

74 - 49 = \frac{x^{2}}{4}

25 = \frac{x^{2}}{4}

therefore, x = \sqrt{25*4} = \sqrt{100} = 10

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Step-by-step explanation:

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Marcus has 731 books he puts about the same number of books on each of nine shelves in his bookcase about how many books are on
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The maximum value of the function: f(x)= -5 x ^2 +30x-200 is?
VARVARA [1.3K]

Answer:

\displaystyle    - 155

Step-by-step explanation:

we are given a quadratic function

\displaystyle f(x) =  - 5 {x}^{2}  + 30x - 200

we want to figure out the minimum value of the function

to do so we need to figure out the minimum value of x in the case we can consider the following formula:

\displaystyle x _{ \rm  min} =  \frac{ - b}{2a}

the given function is in the standard form i.e

\displaystyle f(x) = a {x}^{2}  + bx + c

so we acquire:

  • b=30
  • a=-5

thus substitute:

\displaystyle x _{ \rm  min} =  \frac{ - 30}{2. - 5}

simplify multiplication:

\displaystyle x _{ \rm  min} =  \frac{ - 30}{ - 10}

simply division:

\displaystyle x _{ \rm  min} =  3

plug in the value of minimum x to the given function:

\displaystyle f (3)=  - 5 {(3)}^{2}  + 30.3 - 200

simplify square:

\displaystyle f (3)=  - 5 {(9)}^{}  + 30.3 - 200

simplify multiplication:

\displaystyle f (3)=  - 45  + 90- 200

simplify:

\displaystyle f (3)=   - 155

hence,

the minimum value of the function is -155

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2 years ago
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