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3 years ago

33.63 miles in 3 hours what is the speed in miles per hour

2 answers:

8 0

11.21 miles because first of all you need to divide 33.63 by 3 plus is you do 11.21x3= 33.63 this expression is the inverse operation so this will be to check your work I hope this was helpful :)

Sveta_85 [38]3 years ago

6 0

11.21 miles because you divide 33.63 by 3 and you'll get your answer.

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A company's weekly profit can be modeled by the equation y=-0.5x^2+50x-300 where y is the profit (in dollars) and x is the numbe

Lerok [7]

Answer:

Step-by-step explanation:

The number of items sold that gives the max profit is found in the vertex of this quadratic, (h, k). Lucky for us we have a formula for k that will give us exactly what we are looking for, and nothing else.

$k=c-\frac{b^2}{4a}$ where a = -.5, b = 50, and c = -300:

$k=-300-\frac{50^2}{4(-.5)}=-300+1250=950$

The max profit is $950 per week

8 0

3 years ago

two buildings are 60 feet apart across a street. A person on top of the shorter building finds the angle of elevation of the roo

inessss [21]

Answer:

The height of the taller building is $64\ ft$

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the value of h1

with the angle of elevation

we know that

$tan(20\°)=\frac{h1}{60}$

$h1=60*tan(20\°)$

step 2

Find the value of h2

with the angle of depression

we know that

$tan(35\°)=\frac{h2}{60}$

$h2=60*tan(35\°)$

step 3

Find the height of the taller building

The height of the taller building is the sum of h1 plus h2

$60*tan(20\°)+60*tan(35\°)=60*(tan(20\°)+tan(35\°))=64\ ft$

3 0

3 years ago

Read 2 more answers

I NEED HELP PLS THIS IS DUE IN 3 HOURS

Mariulka [41]

Answer:

Part 1) $x^{2} -2x-2=(x-1-\sqrt{3})(x-1+\sqrt{3})$

Part 2) $x^{2} -6x+4=(x-3-\sqrt{5})(x-3+\sqrt{5})$

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

Part 1)

in this problem we have

$x^{2} -2x-2=0$

$a=1\\b=-2\\c=-2$

substitute in the formula

$x=\frac{-(-2)(+/-)\sqrt{-2^{2}-4(1)(-2)}} {2(1)}\\\\x=\frac{2(+/-)\sqrt{12}} {2}\\\\x=\frac{2(+/-)2\sqrt{3}} {2}\\\\x_1=\frac{2(+)2\sqrt{3}} {2}=1+\sqrt{3}\\\\x_2=\frac{2(-)2\sqrt{3}} {2}=1-\sqrt{3}$

therefore

$x^{2} -2x-2=(x-(1+\sqrt{3}))(x-(1-\sqrt{3}))$

$x^{2} -2x-2=(x-1-\sqrt{3})(x-1+\sqrt{3})$

Part 2)

in this problem we have

$x^{2} -6x+4=0$

$a=1\\b=-6\\c=4$

substitute in the formula

$x=\frac{-(-6)(+/-)\sqrt{-6^{2}-4(1)(4)}} {2(1)}$

$x=\frac{6(+/-)\sqrt{20}} {2}$

$x=\frac{6(+/-)2\sqrt{5}} {2}$

$x_1=\frac{6(+)2\sqrt{5}}{2}=3+\sqrt{5}$

$x_2=\frac{6(-)2\sqrt{5}}{2}=3-\sqrt{5}$

therefore

$x^{2} -6x+4=(x-(3+\sqrt{5}))(x-(3-\sqrt{5}))$

$x^{2} -6x+4=(x-3-\sqrt{5})(x-3+\sqrt{5})$

5 0

3 years ago

9/10 + 9/10 + 9/10<br>HELP NEEDED ASAP PLSSSSSSSSS PLSSS ILL GIVE U MAX POINTS IF U HELP PLSSSSS

n200080 [17]

27/10 or 2 7/10 here hope this helped

7 0

3 years ago

Read 2 more answers

Can someone help me do this ?how do i solve for Y

marin [14]

7x+5y=20
move y by itself

7x+5y=20
minus 7x from both sides
7x-7x+5y=20-7x
0+5y=20-7x
5y=20-7x
divide both sides by 5
5y/5=(20-7x)/5
y=(20-7x)/5
y=(20/5)+(-7x/5)
$y=4- \frac{7x}{5}$

7 0

3 years ago