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3 years ago

8

45.21/.3 I don't know

1 answer:

Elina [12.6K]3 years ago

5 0

45.21 ÷ 0.3

= 150.7

hope i helped

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Given that f(x) =3x^2 - 6x + 11 ,find the values of a,b and c for which f(x) = a(x - b)^2 + c

sertanlavr [38]

First you have to complete the square. The first step would be 3x^2-6x=-11. Then you divide -6 by 2 and square the number you get. 3x^2-6x+9=-11+9. 3x^2-6x+9=-2. Factor out the three to get 3(x^2-2x+3)=-2. You can't factor what is in the parenthesis. You should then add two to each side. 3(x^2-2x+3)+2.
A=3
B= I have no clue sorry.
C=2

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4 years ago

If you're good at trig pleaseeee help meee<br><br><br> Find the value of theta to the nearest minute

Kamila [148]

Answer:

Step-by-step explanation:

using sin formula

let third angle=α

$\frac{sin~\alpha }{7.9} =\frac{sin 18}{8.4} \\sin \alpha=\frac{7.9}{8.4} \times sin~18\\\alpha=sin^{-1} (\frac{7.9}{8.4} \times sin18)\\\approx 16 ^\circ 54'\\\theta=180-(18+16^\circ 54')\\=180-34^\circ54'\\=145^\circ 06'$

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3 years ago

At an agility cclass there are 22 heads and 74 legs. how many humans and how many dogs are in agility class

creativ13 [48]

There are 7 humans and 15 dogs
7+15= 22 heads
7×2=14 legs for humans
15×4=60 legs for dogs
14+60=74 legs

7 0

3 years ago

Please help me to solve the question. (chapter angle between two lines)

dsp73

Answer: $\bold{x^2-\dfrac{181}{13}xy+12y^2=0}$

<u>Step-by-step explanation:</u>

$\tan \theta =\dfrac{y}{x}\quad \longrightarrow \theta=\tan ^{-1}\bigg(\dfrac{y}{x}\bigg)$

$\text{Given:}\quad \theta =\tan^{-1}\bigg(\dfrac{1}{13}\bigg)\quad \longrightarrow x=13,y=1$

Insert x = 13 and y = 1:

x² + 2hxy + 12y² = 0

(13)² + 2(13)(1) + 12(1)² = 0

169 + 26h + 12 = 0

26h + 181 = 0

26h = -181

$h=-\dfrac{181}{26}$

$\text{Insert:}\ h=-\dfrac{181}{26}$

$x^2 + 2\bigg(-\dfrac{181}{26}\bigg) xy + 12y^2 = 0$

$\bold{x^2 -\bigg(\dfrac{181}{13}\bigg) xy + 12y^2 = 0}$

8 0

3 years ago

If the student has already read 2525 of the pages, how long will it take them to read the rest of the book? _____ minutes Your a

Alja [10]

The number of pages the student can read in a minute is an illustration of rates.

The time left to complete the whole book is 90 minutes

From the complete question, the student's rate is:

$\mathbf{Rate = 50\ pages/hr}$

The number of pages is:

$\mathbf{Total = 100\ pages}$

First, we calculate the time to read the whole book

$\mathbf{Total\ Time = \frac{Total\ pages}{Rate}}$

$\mathbf{Total\ Time = \frac{100\ pages}{50\ pages/ hr}}$

$\mathbf{Total\ Time = 2\ hours}$

The number of the student has read is:

$\mathbf{Pages = 25}$

Next, we calculate the time spent on the 25 pages

$\mathbf{Time\ Spent = \frac{Pages}{Rate}}$

$\mathbf{Time\ Spent = \frac{25\ pages}{50\ pages/hr}}$

$\mathbf{Time\ Spent = 0.5\ hr}$

Convert to minutes

$\mathbf{Time\ Spent = 30\ minutes}$

So, the time left is:

$\mathbf{Time\ Left = Total\ Time - Time\ Spent}$

This gives

$\mathbf{Time\ Left = 2\ hours- 30\ minutes}$

$\mathbf{Time\ Left = 1\ hour, 30\ minutes}$

Convert to minutes

$\mathbf{Time\ Left = 90\ minutes}$

Hence, the time left is 90 minutes

Read more about rates at:

brainly.com/question/18065083

5 0

3 years ago