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3 years ago

15

Find the product. simplify if possible. -1/3 times (8 1/7)

2 answers:

mestny [16]3 years ago

8 0

You could change the second fraction into an improper one making it 57/7. When you multiply fractions you multiply straight across so the product would be -57/21. This can be simplified to -19/7 or -2 5/7 if you want to write it as a mixed number. That makes the answer B.

Inessa05 [86]3 years ago

6 0

The answer is b -25/7

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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>

$step - 1 : \: define$

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

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

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

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

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

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

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

$t = \frac{ 3± \sqrt{ 9 + 100} }{2}$

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

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

$t = 6.7 \\ t = - 3.7$

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

$\huge \therefore \: t = 6.7$

5 0

3 years ago

A brother and a sister are in the same math class. there are 8 boys and 20 girls in the class. one boy and one girl are randomly

Pavlova-9 [17]

<h2>the answer i thinkk is 2/20 because since there ae 20 children, then the brother and sister each have a 1% chance, hope this helped!</h2>

7 0

3 years ago

The equation of a line of best fit relating the number of cats c at an animal shelter to the number

WINSTONCH [101]

ANSWER 155 cats

Step by step explanation

No. of dogs = 50=d
No. of cats = 3.5x50- 20
=175-20
=155 cats

8 0

3 years ago

66.64 rounded to the nearest cent

Zolol [24]

It would just be 66.6

4 0

2 years ago

Write an equivalent expression to present patricia total earnings this week 7h + 135 + 5h = ?h + ?

Paul [167]

Answer: 12 h + 135

Step-by-step explanation: 7h +135 + 5h = ?h + ?

7h +5h +135

=12h +135

So u combine like terms together which are 7h and 5h which gives you 12 h.And then you have 135 left,so you add 12h to 135.

Ps.If you don't know what like terms are.I will explain down below.

Like terms are variable that are the same.For an example 4y and 3y are like terms .Another example is 1/3 xy and 6xy .

Hope this helps :) and if it does please give brainliest .

8 0

2 years ago