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alexira [117]
3 years ago
12

Which expression has a value of 17?

Mathematics
2 answers:
Ivahew [28]3 years ago
5 0
The second choice is the answer
fiasKO [112]3 years ago
5 0

Answer:

(12 + 15) \div 3 + 2 \times4

Step-by-step explanation:

<u>*Follow the PEMDAS order of operations*</u>

<u />\left(12+15\right)\div \:3+2\times \:4

<u>calculate within parentheses;-</u>

<u />\left(12+15\right)

=27\div \:3+2\times \:4

<u>Divide:-</u>

<u />27\div3=9

=9+2\times \:4

<u>Multiply:-</u>

<u />2\times \:4=8

=9+8

=17

<u>OAmalOHopeO</u>

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kirill [66]

Answer:Mean: 52.5

Median:54

Mode: 47

Step-by-step explanation:

5 0
3 years ago
PLEASEE HELP!!
Alex777 [14]

Answer:

<h2>A)t=6.7</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
  • quadratic equation
  • quadratic equation word problems
  • solving quadratic
<h3>given:</h3>

h(t) = -4t² + 12t + 100

<h3>to solve:</h3>

t

<h3>tips and formulas:</h3>
  • <u>the</u><u> </u><u>Ball</u><u> </u><u>will</u><u> </u><u>hit </u><u>the</u><u> ground</u><u> </u><u>when</u><u> </u><u>the</u><u> height</u><u> is</u><u> </u><u>0</u>
  • <u>solving</u><u> </u><u>quadratics </u><u>using</u><u> </u><u>quadratic</u><u> formula</u>
  • <u>PEMDAS</u>
<h3>let's solve: </h3>

step - 1 :  \: define

- 4 {t}^{2}  + 12t + 100 = 0

step - 2 :  \\ divide \: both \: sides \: by \:  - 4

{t}^{2}  - 3t - 25 = 0

step - 3 :  \\ solve \: the \: quadratic

formula :  \\ x =  \frac{ - b± \sqrt{ {b}^{2} - 4ac }  }{2a}

define \: a ,b \: and \: c \\ which \: are \: 1, - 3 \: and \:  - 25 \: respectively

t =  \frac{ - ( - 3)± \sqrt{ {( - 3)}^{2} - 4.1. - 25 }  }{2.1}

t =  \frac{  3± \sqrt{ 9    + 100}  }{2}

t = \frac{3 +  \sqrt{ 109 } }{2}

t =  \frac{3  -  \sqrt{ 109 } }{2}

t = 6.7 \\ t =  - 3.7

as \: we \: know \: time \: cannot \: be \: negative

\huge \therefore \: t = 6.7

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Answer

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Step-by-step explanation:

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